Re: [Mspgcc-users] Fwd: New MSP430 GCC version release available!
On 2015-09-21, Peter Bigot <big...@acm.org> wrote: > I no longer use MSP430 and at some point will stop updating my > archive. Earlier this summer I was using the upstream gcc+binutils > (5.0.0-based at the time, selected specifically for C++14 support), > built as documented at > http://pabigot.github.io/bsp430/msp430elf.html. Stock GNU tools work > fine with MSP430 now, though they sometimes do lag in applying > patches that appear in the TI fork. Only the device-specific headers > and linker scripts from TI (also in my archive) are necessary when > using upstream versions. Things have come a long way since I first started using mspgcc about 11 years ago. I'm glad TI stopped dragging their feet and acting generally obstructive and got behind gcc. I'm no longer an active user of the '430, but I'd like to extend my personal thanks to everybody who worked on mspgcc over the years (especially in the old days) -- and thanks/congratulations to whoever at TI finally slapped some sense into management at TI and got them to support gcc. Back in the day it must have been embarassing to many at TI to see how highly everbody regarded Atmel due to thier commitment to gcc and open-source. [Expecially considering how annoying and hard to support the AVR architecture was compared to the '430.] -- Grant Edwards grant.b.edwardsYow! Will this never-ending at series of PLEASURABLE gmail.comEVENTS never cease? -- ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] .data initialization not working
On 2014-12-08, Nicholas Clifton ni...@redhat.com wrote: Hi Peter, Nick: Are you saying that the linker scripts are changing so that a global variable definition like this: int myvar = 43; will result in myvar being stored in RAM, and no initialization of it so the value of myvar when main starts is not 43? No. I am saying that myvar will be stored in the .data section of the executable image and that its value in this image, will be set to 43. In addition the section header for the .data section will be set to an address in RAM, so that when the executable is loaded into the MCU's memory the correctly initialised variable will be ready to be used. That makes no sense. Code is is flash. On startup, where is that 43 going be? If it's not in flash, where? What has changed is the presumption of where the executable is stored before it starts executing. Previously there was an implicit assumption that the executable would be stored in the ROM of the system and that at program startup there would have to be an explicit copying of data from the ROM image into RAM. That's how embedded microprocessors that run from flash _work_. With the current linker scripts there is an assumption that the executable is stored externally, and it is brought into system memory before execution begins. So you're assuming that an MSP430 with a few KB of flash and a few hundred bytes of RAM is running some sort of OS that's going to load the program from disk into RAM and run it? With this scenario there is no need to copy data between ROM and RAM as the data is just loaded directly into RAM. By _WHAT_? -- Grant Edwards grant.b.edwardsYow! Life is a POPULARITY at CONTEST! I'm REFRESHINGLY gmail.comCANDID!! -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151iu=/4140/ostg.clktrk ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] .data initialization not working
On 2014-12-08, Peter Bigot big...@acm.org wrote: Unfortunately this list doesn't support attachments. Perhaps somebody could put it on E2E and add a pointer. Interesting that TI proposed a solution that doesn't work for ROM resident applications, which are all but the most infinitesimal subset of the applications that use an MSP430. (It's so implausible I'm half convinced I don't understand exactly what's happened here.) I agree. This is completely baffling. Either somebody has incorrectly described what's going on, or we're all supposed to hook up disk-drives and blocks of SDRAM to our '430s and run some sort of OS on them. -- Grant Edwards grant.b.edwardsYow! I'm having a RELIGIOUS at EXPERIENCE ... and I don't gmail.comtake any DRUGS -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151iu=/4140/ostg.clktrk ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] .data initialization not working
On 2014-12-08, Eric Price pr...@smartmote.de wrote: to me the change to the TI linker scripts simply makes no sense None at all. It seems to be assuming that an MSP430 is running some sort of OS with some sort of external non-volatile storage from which it loads/runs programs. -- Grant Edwards grant.b.edwardsYow! Okay ... I'm going at home to write the I HATE gmail.comRUBIK's CUBE HANDBOOK FOR DEAD CAT LOVERS ... -- Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server from Actuate! Instantly Supercharge Your Business Reports and Dashboards with Interactivity, Sharing, Native Excel Exports, App Integration more Get technology previously reserved for billion-dollar corporations, FREE http://pubads.g.doubleclick.net/gampad/clk?id=164703151iu=/4140/ostg.clktrk ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] msp430-elf-g++ optimizing out main()
On 2014-09-23, Wylder Keane wylder.ke...@gmail.com wrote: I've been using the new msp430-elf-g++ released on 2014-09-03 to build and debug, and while attempting to reduce the binary size I've added the following arguments for the compilation and linking phases (except gc-sections is linker only). -fdata-sections -ffunction-section -nodefaultlibs --gc-sections While greatly reducing the code space, it also seems to think main() isn't a root and optimizes it away... needless to say this isn't very good. A would guess that the -nodefaultlibs option is preventing the inclusion of the standard startup code, which is what normally calls main(). That unresolved reference to main is what would normally cause the linker to pull in main. You can probably work around it by passing -u main to the linker, but unless there is startup code calling main it won't really matter whether it's linked in or not. -- Grant Edwards grant.b.edwardsYow! Should I do my BOBBIE at VINTON medley? gmail.com -- Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer Achieve PCI DSS 3.0 Compliant Status with Out-of-the-box PCI DSS Reports Are you Audit-Ready for PCI DSS 3.0 Compliance? Download White paper Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog Analyzer http://pubads.g.doubleclick.net/gampad/clk?id=154622311iu=/4140/ostg.clktrk ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] msp430-elf-g++ optimizing out main()
On 2014-09-23, Wylder Keane wylder.ke...@gmail.com wrote: Interesting that main() is not considered a root with gcc. The crt0.S start code which references main is in the binary that is generated event with the nodefaultlibs call. So you end up with an uresolved reference to main when using --gc-sections et al? -- Grant Edwards grant.b.edwardsYow! Your CHEEKS sit like at twin NECTARINES above gmail.coma MOUTH that knows no BOUNDS -- -- Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer Achieve PCI DSS 3.0 Compliant Status with Out-of-the-box PCI DSS Reports Are you Audit-Ready for PCI DSS 3.0 Compliance? Download White paper Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog Analyzer http://pubads.g.doubleclick.net/gampad/clk?id=154622311iu=/4140/ostg.clktrk ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Unable to use LARGE MEMORY MODEL with RH GCC
On 2014-05-30, Eric Decker cire...@gmail.com wrote: CCS is Code Composer Studio which is basically a gui front end to the gcc toolchain. Is that thing still around? It used to be so bad that the TI FAE I knew told everybody to avoid it at all costs and referred to it as Code Composter. Perhaps it's improved... Remember: an IDE is no substitute for knowing how to use the underlying toolchain. -- Grant -- Time is money. Stop wasting it! Get your web API in 5 minutes. www.restlet.com/download http://p.sf.net/sfu/restlet ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] msp430-elf-gcc upcoming release
On 2014-04-22, DJ Delorie d...@redhat.com wrote: I was surprised to see DJ's comment that there actually was no standard system interface; the standard interface I was referring to is the one documented at http://neptune.billgatliff.com/newlib.html The key to a successfully ported newlib is providing stubs that bridge the gap between the functionality newlib needs, and what your target system can provide. This bridge is what I was referring to. Newlib calls read() but does not provide an implementation of it. Libgloss provides various target-specific implementations of read(), the one I wrote for msp430 uses CIO to communicate with the simulator/debugger. Why is newlib calling read(), and from what is it expecting to read? I was expecting for MSP430 to also simply implement the functions stubbed in newlib's libnosys, but at first glance it looks like the CIO one uses different names, and maybe doesn't support all the same functions. Hmmm... it should be all the same names. I only changed the existing libgloss hooks. But, I don't always do all the hooks, usually only write() and exit() are needed for our testing. Again, why should newlib be calling write() and what is it expecting to write _to_? What does it expect exit() to do? -- Grant Edwards grant.b.edwardsYow! Did you move a lot of at KOREAN STEAK KNIVES this gmail.comtrip, Dingy? -- Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] msp430-elf-gcc upcoming release
On 2014-04-23, Peter Bigot big...@acm.org wrote: Again: whatever the environment wants it to do. In my case, I'm using printf(3c) in my code, and I want it to output to one of the UARTs, which newlib accommodates by using write(2) to descriptor 1, just like any other standard C library. This works because I supply a _write() function that does that. But it's not called like a normal C function, it goes through some sort of syscall interface so you don't actually link your _write() function with newlib? Or maybe it sends the data to an LCD. Maybe exit() starts blinking a red LED if the return code isn't zero. Whatever any of the system functions do, it's my choice, and I like that newlib allows me that control. Hmm. Is there an option to build a non-hosted version of newlib which doesn't assume any underlying OS support. -- Grant Edwards grant.b.edwardsYow! Is it 1974? What's at for SUPPER? Can I spend gmail.commy COLLEGE FUND in one wild afternoon?? -- Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] msp430-elf-gcc upcoming release
On 2014-04-23, DJ Delorie d...@redhat.com wrote: But it's not called like a normal C function, it goes through some sort of syscall interface so you don't actually link your _write() function with newlib? It *is* called like a normal C function. You really do just link libgloss.a (or your equivalent) in with your app like you would any other library. I see. I guess to me a syscall interface implies something other than a normal C function call to a function that's linked with the caller. -- Grant Edwards grant.b.edwardsYow! In Newark the at laundromats are open 24 gmail.comhours a day! -- Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] msp430-elf-gcc upcoming release
On 2014-04-22, Peter Bigot big...@acm.org wrote: I expect there'll be some issues with newlib as well; it appears to use a unique syscall interface that I haven't tried to reverse engineer. I don't understand. A syscall API is usually the interface between libc code (which is running in user mode) and an underlying OS kernel that's running in protected mode. Into what What OS kernel is newlib expecting to be able to make syscalls? For example, the syscall interface I deal with is the API between either glibc or uclibc and the Linux kernel. It's architecture specific, since the the mechanism for swithcing to/from protected mode usually has to be done in assembler. It's typically something like: * Load parameters in to specific registers * Execute some variety of SWI instruction to generate a hardware exception/interrupt. -- Grant Edwards grant.b.edwardsYow! Actually, what I'd at like is a little toy gmail.comspaceship!! -- Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] MSP430 GCC goes Red Hat
On 2013-12-12, Mitnacht, Thomas t-mitna...@ti.com wrote: For all of you interested in an official beta version of the MSP430 GCC have a look at the latest MSP430 blog post http://e2e.ti.com/blogs_/b/msp430blog/archive/2013/12/09/you-beta-believe-it-gcc-and-ccsv6.aspx From the above page: The new BETA version of GCC for MSP430 has arrived and offers a full open source tool chain including the GCC compiler, BinUtils, GDB Debug, and DLLv3. What is DLLv3? It sounds frighteningly Microsoftesque... -- Grant Edwards grant.b.edwardsYow! I hope the at ``Eurythmics'' practice gmail.combirth control ... -- Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831iu=/4140/ostg.clktrk ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Size of global variable
On 2013-07-29, ravim ravi.mandl...@gmail.com wrote: My apologies if I am asking something irrelevant to this forum. We are using mspgcc and mspdebug for our project. We are facing some issues with what we assume might be stack overflow. The timer interrupts stops working after around 2 hours, however device still receives packets. Also, when we reset the device after timer gets stuck, they never turn back on unless we re-install the code. We are trying to debug. I wanted to know if there is any possible way we can know the size of global variables in the binary? Not easily, no. It's pretty easy to find the total size of non-automatic initalized variables (section .data) and total size of non-automatic uninitialized variables (.bss) by looking at a linker map file or by using the size or objdump commands on the linked ELF file. You can generate a linker file by passing the -Map mapfilename option to the linker. If you are using the gcc binary to do the linking, then you can tell it to pass an option on to the linker by using the -Wl option: gcc -Wl,-Map,foo.map -o foo.elf file1.o file2.o file3.o However, I'm not aware of a simple way to find the sizes of only the _global_ variables and not include local variables that have a static storage class (The .bss and .data sections include both global and local variables). This will help us narrow down a few specifics. We know there is something in TinyOs when we make, it let us know size of global variables, we are looking for something similar in mspdebug. Why mspdebug? -- Grant Edwards grant.b.edwardsYow! I want a VEGETARIAN at BURRITO to go ... with gmail.comEXTRA MSG!! -- Get your SQL database under version control now! Version control is standard for application code, but databases havent caught up. So what steps can you take to put your SQL databases under version control? Why should you start doing it? Read more to find out. http://pubads.g.doubleclick.net/gampad/clk?id=49501711iu=/4140/ostg.clktrk ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] mspgcc Red Hat release
On 2013-07-08, Brendan Conoboy b...@redhat.com wrote: On 07/04/2013 07:10 PM, Peter Bigot wrote: I have no information about Red Hat's toolchain other than what's been announced here, but: Red Hat's MSP430 toolchain is entirely unrelated to mspgcc. I am unaware of any information having been provided related to support for libc or specific MCUs in this new work. While msp430mcu and msp430-libc might work with some fiddling, it's not clear they're needed, I very much doubt they're the intended solution, and they certainly don't incorporate any changes to accommodate Red Hat's implementation. There is now msp430 support in newlib: http://www.cygwin.com/ml/newlib/2013/msg00362.html Since we did a clean re-implementation of the MSP port we can't comment on the pre-existing mspgcc library solutions: We really don't know. Our plan is to support and enhance standard upstream infrastructure. For libc this means newlib. How does newlib compare with the old msp430 libc when it comes to size? In the past, when I've tried newlib for embedded work it was _huge_. -- Grant Edwards grant.b.edwardsYow! Th' MIND is the Pizza at Palace of th' SOUL gmail.com -- This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] mspgcc undefines too-many-bits shifts in weird way
On 2013-04-21, Paul Sokolovsky pmis...@gmail.com wrote: It's all nice and good. But there's difference between undefined, any value and weird. No, there isn't. Undefined means _exactly_ that: you might get any value -- no matter how wierd you think it. Because too many bits shifts may be undefined in C standard, but shifts by arbitrary number of bits are very well defined in arithmetic - and by very definition of (unsigned) shift, any value shifted by more bits than available in its representation is 0. That's not what the C standard says. That's logical, that's what users know, that's what they expect from compiler, They're wrong to expect that. If the standard says the result is undefined, then expecting anything in particular is wrong. So, msp430-gcc just masks out higher bits of shift count, and in this case leaves original value intact. Which turns term ((1 BITS) - 1), which is common to do BITS-modular arithmetic, and would be expected to just optimize out in case of a full type, into an expression killer with infinite loops, etc. ensuing. If you write incorrect code, you oughtn't be surprised when it behaves incorrectly. -- Grant Edwards grant.b.edwardsYow! Will this never-ending at series of PLEASURABLE gmail.comEVENTS never cease? -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] mspgcc undefines too-many-bits shifts in weird way
On 2013-04-21, Paul Sokolovsky pmis...@gmail.com wrote: On Sun, 21 Apr 2013 17:06:51 -0500 Peter Bigot big...@acm.org wrote: This decision was intentional, as documented in https://sourceforge.net/p/mspgcc/bugs/118/. My recollection is that the choice of how to make things consistent was informed by similar behavior in the contemporaneous gcc for x86 or at least one other target architecture. Thanks for the reference. So, I tested it with x86 gcc 4.4, 4.5, 4.6, 4.7 (packages as shipped by Ubuntu), all of them produce mathematically expected result. That's irrelevent. msp430-gcc 4.5.3, 4.7.0 both produce unexpected result. That's per the standard. If you write code that depends on some particular behavior for somethign that's undefined, then that code is wrong. -- Grant Edwards grant.b.edwardsYow! I'm wearing PAMPERS!! at gmail.com -- Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Compiler optimization bug?
On 2013-02-08, Robert Henig rhe...@redwoodsys.com wrote: gSlaTxFrame.payloadPtr is a char*, so gSlaTxFrame.payloadPtr[gSlaTxFrame.pos]. You are more expert then me with compilers so I won't argue. But it is strange to me that or'ing char into the low byte of an unsigned short causes the high byte of the short to become 0xff. You're not or-ing a char into the low byte of an unsigned short. You're promoting a char to an short, and then or-ing that short short into the destination unsigned short. When the signed char is promited to a 16-bit integer, it is sign-extended (that's what the sxt instruction is for). 0x00-0x7f promotes to 0x-0x007f 0x80-0xff promotes to 0xff80-0x That's the way it works according to the C language standard. If the sxt instruction wasn't there, the generated code would be wrong. I will do some tests to verify. += instead of |= fixes the problem in the code. Only if you can assume the low byte of the destination is 0x00 to start with. If not, then you won't get the right result. A better solution would probably be: short-dest |= (unsigned char)whatever; If you're just shuffling 8-bit wide chunks of data around, always, always, always use unsigned char. Or better yet, uint8_t. -- Grant Edwards grant.b.edwardsYow! Will the third world at war keep Bosom Buddies gmail.comoff the air? -- Free Next-Gen Firewall Hardware Offer Buy your Sophos next-gen firewall before the end March 2013 and get the hardware for free! Learn more. http://p.sf.net/sfu/sophos-d2d-feb ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Follow-ups for TI compiler (CCS) and mspgcc
On 2012-10-29, Peter Bigot big...@acm.org wrote: Since a Code Composer Studio license gets you full compiler support for ARM and MSP430 (and I think C2K) microcontrollers on two hosts covering Windows and Linux for about $450, it's a reasonable next step for somebody going beyond hobbyist needs. It's good to hear that TI supports Linux! It's been a long time coming, but they still seem to have beaten IAR... (Being a command-line--oriented developer, I do find it a little confusing that CCS = Code Composer Studio seems to refer to the development environment, whereas the compiler is a separately versioned anonymous component, which I think I'm calling TI Compiler where it needs to be identified.) I assume that one can ditch the pointy-clicky IDE and use the TI compiler with make? -- Grant Edwards grant.b.edwardsYow! DIDI ... is that a at MARTIAN name, or, are we gmail.comin ISRAEL? -- The Windows 8 Center - In partnership with Sourceforge Your idea - your app - 30 days. Get started! http://windows8center.sourceforge.net/ what-html-developers-need-to-know-about-coding-windows-8-metro-style-apps/ ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] MSP430 GCC goes Red Hat
On 2012-10-26, David Brown david.br...@hesbynett.no wrote: Another issue is that TI make and sell their own msp430 toolchain - Code Composer Studio. I would like to hear exactly how TI see CCS and gcc fitting together and/or competing. It is certainly possible for TI to support both toolchains, but it could be a delicate path to tread. TI is still prentending that Code Composter for the '430 is real? The last time I went to an MSP430 event (which was a few years ago), the FAE openly discouraged people from trying CC for the '430. He told everybody to use IAR for playing with eval kits (he also briefly mentioned gcc). World+dog seemed to be of a single mind: that CC for the 430 was useless, but management at TI didn't want to admit it in public. -- Grant Edwards grant.b.edwardsYow! In 1962, you could buy at a pair of SHARKSKIN SLACKS, gmail.comwith a Continental Belt, for $10.99!! -- WINDOWS 8 is here. Millions of people. Your app in 30 days. Visit The Windows 8 Center at Sourceforge for all your go to resources. http://windows8center.sourceforge.net/ join-generation-app-and-make-money-coding-fast/ ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] MSPGCC Code Size vs IAR
On 2012-05-16, Stefan N?rnberger s...@zelle79.org wrote: If it is purely about code size you should definitely compile without the debugging symbols (drop the -g switch). This should reduce the size of the binary dramatically. If that's true, it's a compiler bug isn't it?. Enabling debug symbols should not affect the generated code or the size of the resulting text segment. Enabling debug symbols with certain types of optimization doesn't always produce usable results (in terms of setting breakpoints on particular source lines, single-stepping, etc.), but it shouldn't produce a larger code size. -- Grant Edwards grant.b.edwardsYow! We have DIFFERENT at amounts of HAIR -- gmail.com -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Stack push inside inline assembly
On 2012-04-17, JMGross msp...@grossibaer.de wrote: Access to word members inside a packed struct is NOT done as a word read/write, but through a rather complex chainof operation, because the alignment of the struct and therefore of the member is unknown. Why is the alignment of a structure member unkown? Unless the structure is packed, the alignemnt should be known. -- Grant Edwards grant.b.edwardsYow! I'm definitely not at in Omaha! gmail.com -- Better than sec? Nothing is better than sec when it comes to monitoring Big Data applications. Try Boundary one-second resolution app monitoring today. Free. http://p.sf.net/sfu/Boundary-dev2dev ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Stack push inside inline assembly
On 2012-04-17, Grant Edwards grant.b.edwa...@gmail.com wrote: On 2012-04-17, JMGross msp...@grossibaer.de wrote: Access to word members inside a packed struct is NOT done as a word read/write, but through a rather complex chainof operation, because the alignment of the struct and therefore of the member is unknown. Why is the alignment of a structure member unkown? Unless the structure is packed, the alignemnt should be known. Actually, now that I think about it, the alignment of fields in packed structures is known as well: bitfields are aligned on bit boundaries, everyting else is aligned to byte boundaries. -- Grant Edwards grant.b.edwardsYow! It don't mean a at THING if you ain't got gmail.comthat SWING!! -- Better than sec? Nothing is better than sec when it comes to monitoring Big Data applications. Try Boundary one-second resolution app monitoring today. Free. http://p.sf.net/sfu/Boundary-dev2dev ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Want use gettimeofday function , but there is no sys/time.h in the include directory.
On 2012-02-24, steve ayer a...@handhelds.org wrote: not necessarily. you can certainly provide a device with a seed timestamp that will carry through an app's runtime. What happens when the app is idle and the processor sleeps with the clos shut down? there's also ntp for folks who run an ip stack on top of their radio. -- Grant Edwards grant.b.edwardsYow! My haircut is totally at traditional! gmail.com -- Virtualization Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Want use gettimeofday function , but there is no sys/time.h in the include directory.
On 2012-02-24, Peter Bigot big...@acm.org wrote: On Fri, Feb 24, 2012 at 10:09 AM, N. Coesel n...@nctdev.nl wrote: At 16:37 24-2-2012, Grant Edwards wrote: On 2012-02-24, steve ayer a...@handhelds.org wrote: not necessarily. you can certainly provide a device with a seed timestamp that will carry through an app's runtime. What happens when the app is idle and the processor sleeps with the clock shut down? You work around that. Maybe a hardware RTC? IMHO there is very little point in trying to argue time and date functions are irrelevant to a microcontroller environment. I'm not arguing that they're irrelvent, I'm just wondering if it makes sense to talk about trying to write a universal gettimeofday() function for inclusion in the library. A lot of devices do need to keep track of date time. Instead of re-inventing the wheel its better to use a different (small) C library which has these functions and stay Posix compliant. Agreed; the underlying function might have to be user-provided just as putchar is for msp430-libc, but the API should be standard. I'm not sure I see the point of the extra layer. Are there other library functions besides gettimeofday() that would call the underlying, user-provided function-that-isnt-gettimeofday? -- Grant Edwards grant.b.edwardsYow! I want to dress you at up as TALLULAH BANKHEAD and gmail.comcover you with VASELINE and WHEAT THINS ... -- Virtualization Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Want use gettimeofday function , but there is no sys/time.h in the include directory.
On 2012-02-24, Peter Bigot big...@acm.org wrote: On Fri, Feb 24, 2012 at 12:30 PM, Grant Edwards grant.b.edwa...@gmail.comwrote: On 2012-02-24, Peter Bigot big...@acm.org wrote: On Fri, Feb 24, 2012 at 10:09 AM, N. Coesel n...@nctdev.nl wrote: A lot of devices do need to keep track of date time. Instead of re-inventing the wheel its better to use a different (small) C library which has these functions and stay Posix compliant. Agreed; the underlying function might have to be user-provided just as putchar is for msp430-libc, but the API should be standard. I'm not sure I see the point of the extra layer. Are there other library functions besides gettimeofday() that would call the underlying, user-provided function-that-isnt-gettimeofday? My point is that there is value in re-using the POSIX API including struct timeval and gettimeofday/settimeofday, which have commonly understood and documented semantics, rather than inventing a new time representation and way to manipulate it. Agreed. It may be that gettimeofday is the fundamental function that must be user-provided. That was my question. (Although clock_gettime() might be an alternative to consider, especially since it's paired with clock_getres(), which could be useful.) Yes, it looks like those might be a better base. AFAICT, you can implement gettimeofday() on top of clock_gettime(), but not the other way around. Once you have gettimeofday with struct timeval, you can add localtime/gmtime and struct tm, and then strftime, and you can interact with your RTC with a well-known API. -- Grant Edwards grant.b.edwardsYow! Well, O.K. at I'll compromise with my gmail.comprinciples because of EXISTENTIAL DESPAIR! -- Virtualization Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Simulation and algorithm timing
On 2012-01-07, David Brown david.br...@hesbynett.no wrote: On 06/01/12 20:30, Grant Edwards wrote: On 2012-01-06, steve ayera...@handhelds.org wrote: of course, you could put a wire on an unused gpio pin and put the device on a scope; that will give you accurate timing of code segments. In my experience that's usually the easiest method by far... One thing to watch out for here is that when you write something like: ... setPinHi(); test code ... setPinLo(); ... you might not be timing all of the test code, or only the test code. The compiler can often move the code around the setPin statements, especially if they are macros or functions that the compiler can see during the compilation. True. When measuring timings like that it's always a good idea to have a peek at the assembly to make sure you're measuring what you think you're measuring. When working with the 3.x msp430 compiler, I never saw it move any code from inside a set-pin/clear-pin pair to outside, but it's certainly allowed in many circumstances. You can try to convice the compiler not to do so by inserting memory barriers or moving test code into a function and calling it, but I've never had to. It's quite possible that the 4.x compiler is more aggressive about moving stuff around. When working on low level stuff like an MSP430, I pretty much always have my Makefiles set up to generate mixed C/assmebly language listings so that it's easy to keep an eye on what the compiler is doing. One advantage of that is that you quickly learn what C constructs are handled efficiently by the compiler wand what aren't -- you learn that the smallest, fastest way to do things in C on an MSP430 is not the same as on an AVR. -- Grant -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Simulation and algorithm timing
On 2012-01-07, Peter Bigot big...@acm.org wrote:
On Sat, Jan 7, 2012 at 9:00 AM, Grant Edwards grant.b.edwa...@gmail.com
wrote:
It's quite possible that the 4.x compiler is more aggressive about
moving stuff around. ?When working on low level stuff like an MSP430,
I pretty much always have my Makefiles set up to generate mixed
C/assmebly language listings so that it's easy to keep an eye on what
the compiler is doing. ?One advantage of that is that you quickly
learn what C constructs are handled efficiently by the compiler wand
what aren't -- you learn that the smallest, fastest way to do things
in C on an MSP430 is not the same as on an AVR.
The 4.x compilers (especially 4.6.x) do optimize much more
aggressively, but if you use the defined peripheral registers like
P2OUT mspgcc had better not re-order them across sequence points,
since those are marked volatile. If you do see something like this,
it's almost certainly a bug and I'd appreciate it being reported on
the SF tracker.
However the test code might be non-volatile, and as such GCC is
still free to move it outside the set/clear pair (AFAICT). The GCC
documentaion I've found appears to indicate that the restriction on
moving code across sequence points only affects volatile accesses.
Quoting from
http://gcc.gnu.org/onlinedocs/gcc-4.5.3/gcc/Volatiles.html#Volatiles
The minimum either standard specifies is that at a sequence point
all previous accesses to volatile objects have stabilized and no
subsequent accesses have occurred.
Note that the GCC docs only say that _volatile_ accesses can't be
moved across sequence points. More searches reveal similar statements
along with a few seemingly well-informed postings where it is
explicitly stated that non-volatile accesses may be moved across
sequence points.
For example from http://blog.regehr.org/archives/28 (which appears to
be a rather well-informed article):
Summary: Most compilers can and will move accesses to non-volatile
objects around accesses to volatile objects, so don't rely on the
program ordering being respected.
I don't know if it's still an issue, but at one point he mentions a
volatile bug in MSP430:
Compilers are not totally reliable in their translation of accesses
to volatile-qualified objects. I've written extensively about
this subject elsewhere, but here's a quick example:
volatile int x;
void foo (void) {
x = x;
}
The proper behavior of this code on the actual machine is unambiguous:
there should be a load from x, then a store to it. However, the port
of GCC to the MSP430 processor behaves differently:
$ msp430-gcc -O vol.c -S -o -
foo:
ret
[I don't know which version of mspgcc that refers to, and it's not
really related to our topic but it does lead me to believe that the
author knows what he's talking about.]
Anyhow I can't find anywhere in GCC docs that say non-volatile
accesses can't be moved across sequence points or volatile accesses.
If sequence points and volatile accesses only constrain ordering of
accesses to volatile objects, and what you're timing doesn't involve
volatile objects, then adding sequence points doesn't matter.
However, adding a memory barrier ought to do the trick. I think.
Pointers to GCC docs actually stating what to expect would be
most welcome...
--
Grant Edwards grant.b.edwardsYow! I KAISER ROLL?!
at What good is a Kaiser Roll
gmail.comwithout a little COLE SLAW
on the SIDE?
--
Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex
infrastructure or vast IT resources to deliver seamless, secure access to
virtual desktops. With this all-in-one solution, easily deploy virtual
desktops for less than the cost of PCs and save 60% on VDI infrastructure
costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox
___
Mspgcc-users mailing list
Mspgcc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Simulation and algorithm timing
On 2012-01-07, Peter Bigot big...@acm.org wrote: On Sat, Jan 7, 2012 at 10:28 AM, Grant Edwards grant.b.edwa...@gmail.com wrote: However the test code might be non-volatile, and as such GCC is still free to move it outside the set/clear pair (AFAICT). [...] Anyhow I can't find anywhere in GCC docs that say non-volatile accesses can't be moved across sequence points or volatile accesses. If sequence points and volatile accesses only constrain ordering of accesses to volatile objects, and what you're timing doesn't involve volatile objects, then adding sequence points doesn't matter. However, adding a memory barrier ought to do the trick. ?I think. Yes, today I think you're right. I've always been a bit fuzzy on this stuff, so don't bet the farm on my opinions. It seems to be a common belief in embedded programmers that compilers aren't allowed to (and won't) move anything past a volatile access, but I've never been able to find any convincing basis for that belief. In fact, that's what I thought back in early December when I added cycle timing to test430 and found a situation where the compiler helpfully moved the test code out from between the start/stop counter reads. I did something that stopped that from happening, though I don't remember what; it wasn't a memory barrier. Later in December, the topic arose again in the context of the thread at http://gcc.gnu.org/ml/gcc/2011-12/msg8.html, during which discussion I became convinced any such move was a compiler error, apparently because I mis-read Richard Guenther's response in http://gcc.gnu.org/ml/gcc/2011-12/msg00026.html. The discussion there ultimately revealed an underlying gcc bug that will eventually be fixed in a 4.7.x release, so confusion about the issue is common even among those who are expected to know better. I don't have a complete copy of the C standard, but some of the excerpts I have read certainly didn't make anything any clearer in my mind. I think reading standards like that is a skillset that takes a lot more work/practice than I've put in. Pointers to GCC docs actually stating what to expect would be most welcome... The current version of what you cited (http://gcc.gnu.org/onlinedocs/gcc/Volatiles.html) is the best I know of, That is clearer than the older versions. Now, if only I wasn't perpetually confused over what's a sequence point and what isn't... [I know it's well defined, but that doesn't mean I can remember it correctly.] -- Grant Edwards grant.b.edwardsYow! I'm thinking about at DIGITAL READ-OUT systems gmail.comand computer-generated IMAGE FORMATIONS ... -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Simulation and algorithm timing
On 2012-01-06, steve ayer a...@handhelds.org wrote: of course, you could put a wire on an unused gpio pin and put the device on a scope; that will give you accurate timing of code segments. In my experience that's usually the easiest method by far... -- Grant Edwards grant.b.edwardsYow! S!! I hear SIX at TATTOOED TRUCK-DRIVERS gmail.comtossing ENGINE BLOCKS into empty OIL DRUMS ... -- Ridiculously easy VDI. With Citrix VDI-in-a-Box, you don't need a complex infrastructure or vast IT resources to deliver seamless, secure access to virtual desktops. With this all-in-one solution, easily deploy virtual desktops for less than the cost of PCs and save 60% on VDI infrastructure costs. Try it free! http://p.sf.net/sfu/Citrix-VDIinabox ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Breakpoints in MSPDebug
On 2012-01-03, Jesse Frey jmf...@alaska.edu wrote: you can use msp430-objdump -dS object files disassemble and intermixed source and disassembly. you can also go the other way with msp430-addr2line Another option I often use is to tell the assmebler to produce a listing file: main.elf: main.c msp430-gcc -g -Wa,-ahl=main.lst -Wall -Werror [...] -o main.elf main.c -- Grant Edwards grant.b.edwardsYow! My life is a patio at of fun! gmail.com -- Write once. Port to many. Get the SDK and tools to simplify cross-platform app development. Create new or port existing apps to sell to consumers worldwide. Explore the Intel AppUpSM program developer opportunity. appdeveloper.intel.com/join http://p.sf.net/sfu/intel-appdev ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Trouble with mspgcc (ld.exe and memory.x)
On 2011-12-12, William Lopes williamlopes@gmail.com wrote: Now I understood. Then I can to program using ELF file only? What is command for this? mspdebug will happily program using the ELF version. Yes, you can program an MSP430 part using the ELF file. The mspdebug program is one way to do that: http://mspdebug.sourceforge.net/ -- Grant Edwards grant.b.edwardsYow! ! Now I understand at advanced MICROBIOLOGY and gmail.comth' new TAX REFORM laws!! -- Learn Windows Azure Live! Tuesday, Dec 13, 2011 Microsoft is holding a special Learn Windows Azure training event for developers. It will provide a great way to learn Windows Azure and what it provides. You can attend the event by watching it streamed LIVE online. Learn more at http://p.sf.net/sfu/ms-windowsazure ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] link question
On 2011-09-26, Bustamante, Paul pbustama...@ceit.es wrote: When I have a 10 functions in a file funcs.c, and I only use one of them, when I link to the main program (main.c), all the functions in the file funcs.c are included in the .elf file. How I can link that only the functions that I use will be included in the .elf file? Compile with the -ffunction-sections option (you may also want the -fdata-sections option), then link with the --gc-sections option. The -ffunction-sections option will place each function in a separate memory section (-fdata-sections does the same thing for variables). The --gc-sections linker option will discard any sections that are not referenced. IIRC, there have been a couple recent versions where support for those features was broken, but I think it's all fixed now. -- Grant Edwards grant.b.edwardsYow! I want EARS! I want at two ROUND BLACK EARS gmail.comto make me feel warm 'n secure!! -- All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2dcopy1 ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Stack checking
On 2011-08-29, JMGross msp...@grossibaer.de wrote: I've been reading this thread for a while and it makes me wonder if there is some kind of tool which can analyze the code and determine the stack usage? I think this may be a safer route than to depend on a real-time stack check. The big question is: what do you do when the stack overflows? Just resetting the MCU is probably not an option so you'll have to add extra code to handle such an 'exception'. That does not seem very trivial to me. Stack usage is a dynamic thing and happens at real-time. Unless you code a benchmarck that always executes exactly the same way, there is no way to determine stack usage. That's not always true. I theory, if your call tree is static (no calls via pointers or other computed means), then you can determine the stack usage by static examination of the call tree since the frame size for each function is know. Then you have to add on top of that the stack usage by the interrupts (if you don't nest interrupts, that's pretty straight-forward) Some minor, small projects might be analyzeable, but for the majority, it's up to you to guess and hope :) If you're lucky, you can do your prototyping and testing with a chip that has extra RAM. That way you can allocate plenty of stack space to each thread, fill the stack with an identifiable pattern, and then measure the stack usage after have done stress-testing testing that covers as much of the call tree as possible. Then you multiply your measured stack usage by a fudge-factor and cross your fingers. -- Grant -- Special Offer -- Download ArcSight Logger for FREE! Finally, a world-class log management solution at an even better price-free! And you'll get a free Love Thy Logs t-shirt when you download Logger. Secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsisghtdev2dev ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] ld flag --gc-sections not working any more?
On 2011-08-05, William Chops Westfield wes...@mac.com wrote: On Aug 4, 2011, at 8:18 AM, Peter Bigot wrote: --gc-sections should now be fixed : Use of msp430-ar will work as expected Hmm. So is there a tool that will take a source module (with multiple functions) compiled with the relevant compiler options (-ffunction-sections and -fdata-sections) and produce a random-access library of the sort you would have gotten if you had broken down the source to file-per-function? No, that's not possible in the general case [see below]. That way you'd get benefit with or without special linker support... Not really. One of the great things about the --gc-sections method is that you can have private data/functions that are shared by all of the public functions in a file. Let's say you split the file up into separate files: one for each function (private or public) and one for each global or file-scope variable. The result? You have to make all of the functions publically visible and all of the data shared by those fuctions publically visible. For example, my module may consist of 5 publically visible functions, 1 publically visible variable, 7 private functions, and 12 priviate variables. Using --gc-sections I have one object file which exposes 6 global symbols. Splitting it up would create 25 object files and 25 global symbols, and all of the module's private data and fuctions are now visible to the rest of the program. It's all about encapsulation and controlling namespace clutter. It could be easily argued that those features should have been provided by the C language design, and I wouldn't disagree. But, they weren't. We're pretty much stuck with C, and --gc-sections goes a long ways in patching a major hole in C's design. Personally, I think Modula-2/3 or Ada are all probably better suited for embedded systems use than C, but that's pretty much a moot point. C++ tried to fix some of C's encapsulation and namespace shortcomings, but the result was a complete dog's breakfast. -- Grant Edwards grant.b.edwardsYow! Is it 1974? What's at for SUPPER? Can I spend gmail.commy COLLEGE FUND in one wild afternoon?? -- BlackBerryreg; DevCon Americas, Oct. 18-20, San Francisco, CA The must-attend event for mobile developers. Connect with experts. Get tools for creating Super Apps. See the latest technologies. Sessions, hands-on labs, demos much more. Register early save! http://p.sf.net/sfu/rim-blackberry-1 ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] ld flag --gc-sections not working any more?
On 2011-08-05, Peter Bigot pabi...@users.sourceforge.net wrote: On Fri, Aug 5, 2011 at 12:06 AM, William Chops Westfield wes...@mac.com wrote: On Aug 4, 2011, at 8:18 AM, Peter Bigot wrote: --gc-sections should now be fixed ? : ?Use of msp430-ar will work as expected Hmm. ?So is there a tool that will take a source module (with multiple functions) compiled with the relevant compiler options (-ffunction-sections and -fdata-sections) and produce a random-access library of the sort you would have gotten if you had broken down the source to file-per-function? I personally don't know of such a tool; it seems --gc-sections is the way this is need is expected to be met. FWIW, as an experiment I added the flags to msp430-libc and it seems to work, though the savings is naturally not particularly impressive (90 bytes of a 28KB image from a monolithic TinyOS program). The benefit is seen mainly when you want to reuse code or build multiple versions of a program with different features enabled. For example, you write a library module providing a half-dozen publically visible functions: it may have another half-dozen private functions and some private data. In a given program you may only use one or two of the public functions. Without --gc-sections you have come up with a set of preprocessor macros to enable/disable the building of individual public functions. Then inside the module you need even more complex cpp magic to figure out which private functions and data are needed based on which public functions have been enabled. Then you have to re-compile the module everytime the configuration changes. Either that, or you replace your single object file with a dozen plus object files and you expose all of the module's private data to everybody and his dog. If you're just bulding multiple versions of one program with different features enabled, --gc-sections allows you to do that without having to recompile anything -- it's all handled at the link stage. If you want to build the full-fat version, you link in all the files. If you don't want features A and B, you don't link in object files A and B. The linker figures out what other functions/data aren't need now that A and B have been left out, and those functions get left out as well. -- Grant Edwards grant.b.edwardsYow! Somewhere in DOWNTOWN at BURBANK a prostitute is gmail.comOVERCOOKING a LAMB CHOP!! -- BlackBerryreg; DevCon Americas, Oct. 18-20, San Francisco, CA The must-attend event for mobile developers. Connect with experts. Get tools for creating Super Apps. See the latest technologies. Sessions, hands-on labs, demos much more. Register early save! http://p.sf.net/sfu/rim-blackberry-1 ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] ld flag --gc-sections not working any more?
On 2011-08-03, Peter Bigot big...@acm.org wrote: There should be no reason to use --gc-sections. Why not? I've been using it for over a decade and find it very useful. -- Grant Edwards grant.b.edwardsYow! Spreading peanut at butter reminds me of gmail.comopera!! I wonder why? -- BlackBerryreg; DevCon Americas, Oct. 18-20, San Francisco, CA The must-attend event for mobile developers. Connect with experts. Get tools for creating Super Apps. See the latest technologies. Sessions, hands-on labs, demos much more. Register early save! http://p.sf.net/sfu/rim-blackberry-1 ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] ld flag --gc-sections not working any more?
On 2011-08-03, Peter Bigot big...@acm.org wrote: The library archives are built so that unreferenced functions are not linked in. There are other files in most projects besides the library archives. ;) Furthermore, I believe gc-sections operates on whole sections, not functions, so unless you have code built with -ffunction-sections it would make no difference. Yes, in order for gc-sections to be useful you need to use -ffunction-sections and -fdata-sections -- and that's generally how people use it. Until the binutils update from half an hour ago, I have no reason to believe mspgcc supported -ffunction-sections correctly. The old 3.x version did. I used it for years. (The linker changes will not be back-ported to the 4.5.3 LTS release.) The same should hold for -fdata-sections. Are you saying that -fdata-sections is broken in recent versions of mspgcc? If you see a reduction in code size when you use --gc-sections, and what it removes really wasn't necessary, figure out why it got put in there in the first place and fix it there. That's pretty narrow-minded. When reusing code, it's _very_ useful to be able to put a set of related functions in a single file so that you can avoid name-space issues and only expose certain selected names in the global namespace. If all of the functions aren't needed for a given project, you -ffunction-sections and -gc-sections can be used to discard the ones that aren't needed. This has been a common way of doing things for a long time. I've been using it for at least a dozen years and I certainly didn't invent it. I don't see how you can decided all of a sudden that it's not valid. Putting each function in a separate file produces a big mess both -- both in relation to namespace pollution and managing source files. -- Grant Edwards grant.b.edwardsYow! ... the HIGHWAY is at made out of LIME JELLO and gmail.commy HONDA is a barbequeued OYSTER! Yum! -- BlackBerryreg; DevCon Americas, Oct. 18-20, San Francisco, CA The must-attend event for mobile developers. Connect with experts. Get tools for creating Super Apps. See the latest technologies. Sessions, hands-on labs, demos much more. Register early save! http://p.sf.net/sfu/rim-blackberry-1 ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] ld flag --gc-sections not working any more?
On 2011-08-03, aliko ali.tli...@gmail.com wrote: To correct issue I've changed couple of lines in memory.x file as where suggested in one forum. from: KEEP(*(.init)) *(.init0) /* Start here after reset. */ *(.init1) /* User definable. */ *(.init2) /* Initialize stack. */ *(.init3) /* Initialize hardware, user definable. */ *(.init4) /* Copy data to .data, clear bss.*/ *(.init5) /* User definable. */ *(.init6) /* C++ constructors. */ *(.init7) /* User definable. */ *(.init8) /* User definable. */ *(.init9) /* Call main(). */ to: KEEP(*(.init)) KEEP(*(.init0)) /* Start here after reset. */ KEEP(*(.init1)) /* User definable. */ KEEP(*(.init2)) /* Initialize stack. */ KEEP(*(.init3)) /* Initialize hardware, user definable. */ KEEP(*(.init4)) /* Copy data to .data, clear bss.*/ KEEP(*(.init5)) /* User definable. */ KEEP(*(.init6)) /* C++ constructors. */ KEEP(*(.init7)) /* User definable. */ KEEP(*(.init8)) /* User definable. */ KEEP(*(.init9)) /* Call main(). */ Yep, that's the solution. And now firmware works good. The size of firmware using gc-sections is 77% of that not using it and it does metter I think. Of course it does. -- Grant Edwards grant.b.edwardsYow! I'll eat ANYTHING at that's BRIGHT BLUE!! gmail.com -- BlackBerryreg; DevCon Americas, Oct. 18-20, San Francisco, CA The must-attend event for mobile developers. Connect with experts. Get tools for creating Super Apps. See the latest technologies. Sessions, hands-on labs, demos much more. Register early save! http://p.sf.net/sfu/rim-blackberry-1 ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] compiler optimization bug in mspgcc4?
On 2011-07-13, Ricky Wong Yung Fei yfwongri...@gmail.com wrote: I know I could actually compare the assembly outputs of the both OS image, but before I do so, I would like to confirm the likelihood of this being a bug as I'm not very good with gcc internals e.g. when programs work in O0 but not O1 and above, is it normally a bug with the optimizer? With other more widely used backends, I'd say it's almost always a programming error (e.g. a missing volatile keyword). The MSP430 backend doesn't have as many miles on it as the IA32, ARM, or SPARC backends, so there's more of a chance it is an optimizer-induced backend bug. Narrowing it down to a specific bit of code is the only way to tell... -- Grant Edwards grant.b.edwardsYow! What GOOD is a at CARDBOARD suitcase ANYWAY? gmail.com -- AppSumo Presents a FREE Video for the SourceForge Community by Eric Ries, the creator of the Lean Startup Methodology on Lean Startup Secrets Revealed. This video shows you how to validate your ideas, optimize your ideas and identify your business strategy. http://p.sf.net/sfu/appsumosfdev2dev ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] modulo
On 2011-05-10, Miriam Dali miriamd...@yahoo.fr wrote: Thank you for your answer , I'm really sorry my question was not clear :( I wrote a simple code in C, but when I port it to mspgcc it doesn't give me the right value. This is a part of my code: unsigned short int xk=3588, yk=47541, yk1, sig=10, de=1; unsigned long int xk1; xk1=( xk+(sig*(yk-xk)*de)); yk1=xk1 % 65535; the result that I expect is xk1=443118 and yk1=49908, but in mspgcc it gives me xk1=yk1=49902 I don't know where is the fault may be in the type choice? sig*(yk-xk)*de is too big to fit in 16 bits, so the result of that is getting truncated, and which wrong answer you get will depend on the order in which the mulitply operations are done. You need to tell the compiler to calculate xk+(sig*(yk-xk)*de using 32-bit operations not 16-bit operations, so make one of the variables on the right hand side (e.g. yk) a long integer. -- Grant Edwards grant.b.edwardsYow! I want a WESSON OIL at lease!! gmail.com -- Achieve unprecedented app performance and reliability What every C/C++ and Fortran developer should know. Learn how Intel has extended the reach of its next-generation tools to help boost performance applications - inlcuding clusters. http://p.sf.net/sfu/intel-dev2devmay ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] modulo
On 2011-05-10, Miriam Dali miriamd...@yahoo.fr wrote: Thank you for your answers, I tried to cast yk to long int as you said, the result that I get is: xk1=fffbc2ee, and yk1=49898 it's the same result when I cast all the variables Show us the code. -- Grant Edwards grant.b.edwardsYow! Hey, wait at a minute!! I want a gmail.comdivorce!! ... you're not Clint Eastwood!! -- Achieve unprecedented app performance and reliability What every C/C++ and Fortran developer should know. Learn how Intel has extended the reach of its next-generation tools to help boost performance applications - inlcuding clusters. http://p.sf.net/sfu/intel-dev2devmay___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] official mspgcc forum
On 2011-05-04, msp430 microcontrollerfr...@gmx.at wrote: hello mspgcc community, There is a mspgcc forum at: http://develissimo.com/forum/ We want it to make it the official mspgcc forum! This mailing list is the official mspgcc forum. develissimo is a NEW 2011 electronic platform targeting open source development only! There are great advantages over mailing-lists: I call BS on that.. The Forum should support you with fine layout, Web forums are a huge waste of time. I monitor a dozen or two mailing lists in only a few minutes per day. I use slrn pointed news.gname.org, but there are other equally efficient methods. Were I to attempt to do the same via web forums it would waste hours of my time. the possibility to communicate via PMs(personal messages), hide your personal data such as email from the outside world, control and share social networking data, and a bunch of other nice features, such as: +Show new posts since last visit +Mark all topics as read +Search functions +Chang layout via different included stylesheets. +Add avatar +User defined settings +User ability to write their own electronic blogs etc. Hopefully you will join us! Not a snowball's chance in a CAT scanner. Other interesting electronic related forums are: MSPDebug, Eclipse, KiCAD, Ktechlab, SDCC, GCC, Programming Sections, C, C++, Java, Python, and a lot more! Develissimo launched March 2011 and has reached production stage. Have a look at http://develissimo.com/ main page. best greetings Raphael from develissimo.com ps: lets move from old style mailing lists to new 2011 Forums. Let's not. Mailing lists are brilliant for this sort of thing. We forums are screen-wasting time-sinks designed primarily to sell ads. -- Grant Edwards grant.b.edwardsYow! over in west at Philadelphia a puppy is gmail.comvomiting ... -- WhatsUp Gold - Download Free Network Management Software The most intuitive, comprehensive, and cost-effective network management toolset available today. Delivers lowest initial acquisition cost and overall TCO of any competing solution. http://p.sf.net/sfu/whatsupgold-sd ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Anyone know what RWM in the TI 5438 means?
On 2011-04-06, JMGross msp...@grossibaer.de wrote: Ah. ?I guess I got taken in by TI calling the MSP430 a RISC machine. Yea, that's a lie. I asked a TI FAE about that when it came up in his power-point sleep--a-thon. He admitted it was a lie. I'd say technically its marketing. There's a difference? There's a difference between a lie, not telling the whole truth and simplifying things. The MSP isn't a CISC too. It's more RISC than CISC I disagree. It lacks almost all of the characteristics typical of a RISC architecture: * fixed, single-clock execution? No. * fixed width instructions? No. * load/store architecture? No. * pipelined? No. * Harvard architecture? No. * branch delay slot? No * small instruction count? Yes. Not all RISC architectures have all of the above, but simply having a small instruction count just isn't good enough IMO. (and has all advantages of a CISC by not having the drawbacks), so yes, it's not RISC but RISC-like. But you cannot explain ten pages of how RISC like it is when writing an ad. So RISC is much closer to the truth than CISC, and there's no 'MISC' in the middle. Also, RISC is no trademark and no otherwise protected term. It's a (not protectable) acronym and using it does not tie you to any definition. It's different to saying it follows the RISC standard, which would be a lie if such a 'standard' did exist. However, the cited description of a RISC processor is no standard at all, just a description. RISC is indeed a rather loose term based on a variety of criteria -- all but one of which (small instruction count) are not met by the MSP430. I really like the MSP430 architecture, but it's not a RISC processor. It's an elegently stripped-down CISC processor. -- Grant Edwards grant.b.edwardsYow! This PORCUPINE knows at his ZIPCODE ... And he has gmail.comVISA!! -- Xperia(TM) PLAY It's a major breakthrough. An authentic gaming smartphone on the nation's most reliable network. And it wants your games. http://p.sf.net/sfu/verizon-sfdev ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Anyone know what RWM in the TI 5438 means?
On 2011-04-06, JMGross msp...@grossibaer.de wrote: Well, I like it too, but it is definitely not a stripped-down CISC. It is a fresh start with the RISC idea in mind, but not following the established implementations of this idea. I just don't see how not following the the established idea of what RISC is can result in something that should be call RISC. To me, it looks more like a PDP11 redesign with 16 registers instead of 8. Unfortunately, increasing the register set size required that some of the PDP11's orthogonality had to be thrown out. Saying that it cannot be RISC without having the listed attributes is like saying you may not call yourself a human without blonde hair, blue eyes and being tall. (which is nonsense, as we all know) :) Saying it's RISC without following the commonly accepted idea of what RISC is just seems like redifining RISC to mean anything at all. -- Grant Edwards grant.b.edwardsYow! I just had my entire at INTESTINAL TRACT coated gmail.comwith TEFLON! -- Xperia(TM) PLAY It's a major breakthrough. An authentic gaming smartphone on the nation's most reliable network. And it wants your games. http://p.sf.net/sfu/verizon-sfdev ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Anyone know what RWM in the TI 5438 means?
On 2011-04-05, Eric Decker cire...@gmail.com wrote: On Mon, Apr 4, 2011 at 8:43 PM, Steve Underwood ste...@coppice.org wrote: A large part of the MSP430 instruction set is read-modify-write. How do you think all those memory to memory operations work? Ah. I guess I got taken in by TI calling the MSP430 a RISC machine. Yea, that's a lie. I asked a TI FAE about that when it came up in his power-point slee--a-thon. He admitted it was a lie. -- Grant Edwards grant.b.edwardsYow! RELATIVES!! at gmail.com -- Xperia(TM) PLAY It's a major breakthrough. An authentic gaming smartphone on the nation's most reliable network. And it wants your games. http://p.sf.net/sfu/verizon-sfdev ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Changes to mspgcc CRT capabilities in uniarch release
On 2011-03-17, JMGross msp...@grossibaer.de wrote: - Urspr?ngliche Nachricht - Von: Grant Edwards Gesendet am: 16 Mrz 2011 17:51:51 It's not only that the datasheets talk about disabling the watchdog. Disabling an already disabled watchdog does no harm. neither is enabling it again a problem, if you actively want to use it. But not enabling it when the docs say it is enabled What docs say it's enabled when main() is entered in an app built with mspgcc? The processor datasheet says that after a BOR/POR/PUC the WDT is enabled. And that's still true. The processor datasheet is mute about the behavior of startup code that's shipped with compilers. Disabling it by inherently placed default compiler code, especially if this is neither well documented nor easily to prevent, is worse than bad. I agree that the behavior needs to be documented and there should be an option to specify that the WDT not be disabled during startup. IMHO, leaving it enabled during startup would have been more desirable. Not only more desireable, but a MUST. But, it wasn't done that way, and we can't decide now that it MUST have been. I think a way to prevent the startup code from disabling the WDT is an absolute requirement. indeed. Here we totally agree. But, as long as there's a way to get either behavior, I don't think changing the default behavior should be undertaken lightly. Not if 'the way' means writing your own startup code (in assembly language) or using compiler-specific switches, attrivutes and other things, just to get the expeccted default behavior. Agreed. Replacing the startup code with user-written code isn't a good-enough option. besides being less than not obvious, it also digs the gap between mspgcc and the 'official' MSP compilers even deeper. However, being unprotected for some milliseconds (which is an eternity) while you think you are, isn't good. In fact, it is way worse than being protected when you don't think you are :) Is an option to prevent the WDT from being disabled by startup code insufficient for that scenario? Yes, if it is not the default behavior. Imagine a PC where the BIOS will silently switch off the UDMA without an option to enable it, My hypothetical stated that there _was_ an option to leave it enabled. You seem to be knocking down a straw man. -- Grant Edwards grant.b.edwardsYow! I feel like a wet at parking meter on Darvon! gmail.com -- Colocation vs. Managed Hosting A question and answer guide to determining the best fit for your organization - today and in the future. http://p.sf.net/sfu/internap-sfd2d ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Changes to mspgcc CRT capabilities in uniarch release
On 2011-03-16, JMGross msp...@grossibaer.de wrote: - Urspr?ngliche Nachricht - Von: Chris Liechti Gesendet am: 15 Mrz 2011 20:26:40 It's not only that the datasheets talk about disabling the watchdog. Disabling an already disabled watchdog does no harm. neither is enabling it again a problem, if you actively want to use it. But not enabling it when the docs say it is enabled What docs say it's enabled when main() is entered in an app built with mspgcc? while it has been disabled by the compiler _does_ do harm. IMHO, leaving it enabled during startup would have been more desirable. I think a way to prevent the startup code from disabling the WDT is an absolute requirement. But, as long as there's a way to get either behavior, I don't think changing the default behavior should be undertaken lightly. There are many devices where the MCU is only powered when an event occurs. The MSP is no chip for a router that runs for mothn without reboot. It is for devices which require low power consumption. And the lowest is shutting down when not required. :) That's what the new .5 LPMs were designed for. However, being unprotected for some milliseconds (which is an eternity) while you think you are, isn't good. In fact, it is way worse than being protected when you don't think you are :) Is an option to prevent the WDT from being disabled by startup code insufficient for that scenario? a hardware watchdog is also often used to protect against programming errors (e.g. not enough stack space for all combinations of interrupts and foreground code). this kind of protection is not needed during startup as the code there is proven (and interrupts locked). Using a WDT for dixing software bugs is very bad style. What happens? The device resets and runs into the same condition again. It's a dirty way to 'fix' defective code or faulty program design. One might claim that having a backup generator available to power the cooling pumps in a nuclear reactor is bad style too, but I'm not going to argue against that! -- Grant Edwards grant.b.edwardsYow! I'm having an at EMOTIONAL OUTBURST!! But, gmail.comuh, WHY is there a WAFFLE in my PAJAMA POCKET?? -- Colocation vs. Managed Hosting A question and answer guide to determining the best fit for your organization - today and in the future. http://p.sf.net/sfu/internap-sfd2d ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Include files for assembler
On 2011-03-05, Matt mkni...@tesco.net wrote: If you use a .S suffix for the assmebly file, then you can assemble them with gcc, and it'll do the normal cpp stuff. Thanks Grant. That works a treat on the command line. I just need to work out how to make Eclipse do it! You're on your own there. I've tried Eclipse a couple times, and both times left a pretty bad taste in my mouth. -- Grant -- What You Don't Know About Data Connectivity CAN Hurt You This paper provides an overview of data connectivity, details its effect on application quality, and explores various alternative solutions. http://p.sf.net/sfu/progress-d2d ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Include files for assembler
On 2011-03-05, Matt mkni...@tesco.net wrote: I'm using mspgcc-4.4.5/Eclipse/Ubuntu to compile a mixed C and asm project for 'F2013. I have assembler functions in their own .S file that use some TimerA registers. Is there a way to make GNU assembler recognise C-style header files? If you use a .S suffix for the assmebly file, then you can assemble them with gcc, and it'll do the normal cpp stuff. -- Grant Edwards grant.b.edwardsYow! Wow! Look!! A stray at meatball!! Let's interview gmail.comit! -- What You Don't Know About Data Connectivity CAN Hurt You This paper provides an overview of data connectivity, details its effect on application quality, and explores various alternative solutions. http://p.sf.net/sfu/progress-d2d ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] mspgcc4 version 20110213 released
On 2011-02-14, Peter Bigot pabi...@users.sourceforge.net wrote: The package has now been reduced to include patches only for the actively developed upstream releases: binutils 2.21, gcc 4.4.5, and gdb 7.2. And, of course, the immortal insight 6.8.1. ITYM the undead insight 6.8.1. ;) [I must admit that once-upon-a-time I did find the combined C/assembly/register display useful when debugging some startup code.] -- Grant Edwards grant.b.edwardsYow! My life is a patio at of fun! gmail.com -- The ultimate all-in-one performance toolkit: Intel(R) Parallel Studio XE: Pinpoint memory and threading errors before they happen. Find and fix more than 250 security defects in the development cycle. Locate bottlenecks in serial and parallel code that limit performance. http://p.sf.net/sfu/intel-dev2devfeb ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] mailing list administrivia
On 2010-11-30, JMGross msp...@grossibaer.de wrote: - Urspr?ngliche Nachricht - Von: Matthias Andree Gesendet am: 29 Nov 2010 12:15:21 The list is driven by Mailman, so you can subscribe with all your accounts that you need to post from and set all but one to nomail mode, i. e. you can post because you're subscribed, but you don't receive copies. Interesting. How does one know this if he's not the list maintainer? You point a browser at the link in the header of every message: https://lists.sourceforge.net/lists/listinfo/mspgcc-users Or you send a message to the help address that's in the headers of every message: mailto:mspgcc-users-requ...@lists.sourceforge.net?subject=help And how does this work? I'm sure there is a howto somewhere and if you know 'how to' you'll find the howto. :) It's all in the headers. All mailing lists put everything you need to know to subscribe, unsubscribe, or adjust your settings in the headers of every message. Your webmailer should offer the opportunity to save local copies anyways, such as Auto-Bcc, sent folders, or thereabouts. Yes. The webmailer. Then the copies are in a private folder of the mailer, and not where they are on my main system. Anyway, as I said before, there i sno sense in forcing people to rearrange their organisation to fit this group. As the reuired reorganisation needed of a different group may be incompatible, leaving people to decide to use one of them but not both. That's surely not the intention of a mailing list. I'm not sure what you're saying in that paragraph. The proposed changes for this list will make it the same as many, many other lists. If your mail client is so bad, perhaps you'd be better off reading the list via gmane.org: http://news.gmane.org/gmane.comp.hardware.texas-instruments.msp430.gcc.user Personally, I use a news client and point it at gmane's NNTP server. Also, why keeping a copy in sent when the mail already bounces back through the list (unless it is rejected)? Bounce means something very specific in the context of e-mail and mailing lists. I don't think you mean bounce. I'm sure there are many people who see it the same. Yet since they'll never appear here, you'll never know of them and therefore you might think there are none. :) Your messages don't usually appear threaded but start new threads. This is a nuisance. Hmm, well, I didn't know and will look into this, but I doubt there's anything I can do. Yes there is: 1) Use a working mail client (web-based or otherwise). Gmail works fine. 2) Use the web UI at gmane.org. 3) Use an NNTP client pointed to gmane.org's NNTP server. The mailing program I usually use is a portable low-footprint program that does not mess with the inbox unless I explicitely tell it so. The mailing program you usually use is broken. It's a but like the old Windows Messaging 2.0. Download of headers only, unless you click on a mail and so on. I got it from my hoster and I'm happy with it for ten years now (with updates, of course). Small, fast, portable, useful. And it normally does its job. Except it seems to be broken in several respects, or you wouldn't be breaking thread nor complaining now about how your mail client works with mailing lists who require posters to subscribe. It allows plain text posting by subscribers, so what's the point? Plain text posting is a technique from the last milennium and neither up-to-date nor commonly available unless you're system administrator and deliberately configure your system against the default. Whatever. Feel free to start your own mailing list. -- Grant Edwards grant.b.edwardsYow! Do you think the at Monkees should get gas on gmail.comodd or even days? -- Increase Visibility of Your 3D Game App Earn a Chance To Win $500! Tap into the largest installed PC base get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Application size
On 2010-11-25, JMGross msp...@grossibaer.de wrote: msp430-size -t program.elf For more details: msp430-objdump --headers program.elf For even more details, tell the linker to produce a map file, and look at that. -- Grant -- Increase Visibility of Your 3D Game App Earn a Chance To Win $500! Tap into the largest installed PC base get more eyes on your game by optimizing for Intel(R) Graphics Technology. Get started today with the Intel(R) Software Partner Program. Five $500 cash prizes are up for grabs. http://p.sf.net/sfu/intelisp-dev2dev ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] mailing list administrivia
On 2010-11-16, Peter Bigot p...@peoplepowerco.com wrote: 1) I propose to change the list management so that email to it from people who are not subscribed is immediately bounced (saying that the list requires subscription for posting), rather than put into a pending bucket where Chris or I have to look at it. If it's worth our time to read, it's worth the sender's time to subscribe so they can see responses. Sounds reasonable to me. It would be nice of the change in status was reflected at Gmane.org, but even if it isn't, people will figure it out. 2) Anybody who subscribes from an address that implements a screening filter like Boxbe so that mail to the list results in a request to add yourself to the recipient's Guest List will be summarily unsubscribed. Maybe I'll send an email saying why. I won't bother to add myself to your guest list to tell you that it's happened. Manage your spam without inconveniencing me, thank you very much. No problem with that. -- Grant Edwards grant.b.edwardsYow! I just remembered at something about a TOAD! gmail.com -- Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today http://p.sf.net/sfu/msIE9-sfdev2dev ___ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
Re: [Mspgcc-users] Creating .lst files with C code
On 2010-07-02, JMGross msp...@grossibaer.de wrote: Von: N. Coesel Gesendet am: 01 Jul 2010 14:19:57 I too use objdump to generate a complete project listing from the elf file. I've never seen that work except for extremely trivial programs. It has, however, some serious drawbacks. As in it doesn't work? :) Not only that jumps and calls are not printed with their symbolic name, also the source code in the listing is sometimes (often) from a completely different file or from different lines of the same file. So it is virtually useless. AFAIK this is the result of compiling with optimisation on. If you want a proper list file with source code mixed in, you should compile without optimisation (-O0) and with full debugging enabled (IIRC -g3). At least thats how it works for me when using GCC in general. No, its not an optimization problem. The individual .lst files of the object files are fine. Sometimes, the source is a bit mangled by optimization, (and sometimes, the assembler will show som boguse unreachable code warnings too due to optimization, but in general it fits. At least the source is form the same function. But in the global .lst file that objdump generates, the source code is a real mess. Generating source listings from a linked program using objdump has never worked for any target architecture I've tried. IMO, you're beating your head against the wall trying to generate source listings with objdump. Generating them for individual files by passing appropriate flags to the assembler has always worked on all the architectures I've used (though I can't vouce for gcc 4.x on the '430, it works fine with 3.x). I can't find a pattern too. Sometimes the source code is okay, somethimes it is a completely different part of the right file, sometimes it is from a completely different source file not related to the code at all. That's the behaivior I've always seen when trying to generate source listings using objdump. If I switch on some more info in the global .lst, the comments show 'File a, line x' yet the source code is from file b, line x or even line y. So the info is there (File a line x would be correct). Even the path of file a is shown correctly (so using VPATH is not aproblem) But then somehow things get messed up. Seems that objdump is unable to extract line x in file a and extracts line y from file b instead. Based on how completly it's broken and how long it's been that way, I assumed that it wasn't supposed to work... -- Grant Edwards grant.b.edwardsYow! I have accepted at Provolone into my life! gmail.com
Re: [Mspgcc-users] Creating .lst files with C code
On 2010-06-30, Diane Gagne drose.ga...@gmail.com wrote: I am in the process of moving from mspgcc 3.2.3 to mspgcc4, but I am having trouble with the creation of the .lst files. When my source is compiled with the 3.2.3 the list files have the C code printed in them along with the assembly. Using the same makefile, and compiling with the mspgcc4 the C code goes away which makes it harder to read. I realize that objdump will give me close to what I am looking for, but those files do not have the jumps listed. Is there a way to get the C code back, maybe a default option changed that I do not realize? Can you give us a hint as to what options are you using to generate the listing? -- Grant Edwards grant.b.edwardsYow! I just remembered at something about a TOAD! gmail.com
Re: [Mspgcc-users] Unused functions occupying unnecessary memory
On 2010-06-22, JMGross msp...@grossibaer.de wrote: If I understood the linker scripts correctly, the linker will put all .text and .text.* compiler segments into the linker text segment. After the unreferenced .text.* sections are discarded, the remaining ones will all be placed into the .text section in the output file. As I undestood you, the linker should do this for any (complete) object file anyway, independently of the gc-sections setting. The discarding of unreferences sections is enabled by the --gc-sections linker option. Yet it doesn't. Any object file is put into the binary, whether referenced or not. Unless you specify the --gc-sections option linker option. So there are no empty segments to be discarded by -gc-sections. I'm not sure what empty segments you're talking about. segments - = sections. I think I got the 'empty' by browsing the ld option description. Or i dedutcted it from your expression of discarded unused content. unused != empty Are you _sure_ you passed the -gc-sections flag to the linker? no (see below) First, both -ffunction-sections and -gc-sections flags are commented out in your makefile. I tried with and without. The version I posted was the last test (without both). Second, it's '--gc-sections' not '-gc-sections' I tried both :) And both would have produced an error/warning using your posted makefile, which should have prompted you to try figure out what you were doing wrong rather than claiming the feature didn't work: $ make msp430-gcc -g -ffunction-sections --gc-sections -Wa,-ahl=main.lst -O2 -Wall -Werror -mmcu=msp430x149 -Wa,-ahld=main.lst -o main.elf main.c cc1: unrecognized option -fgc-sections' make: *** [main.elf] Error 1 $ make msp430-gcc -g -ffunction-sections -gc-sections -Wa,-ahl=main.lst -O2 -Wall -Werror -mmcu=msp430x149 -Wa,-ahld=main.lst -o main.elf main.c cc1: warning: c-sections': unknown or unsupported -g option msp430-objcopy -O srec main.elf main.hex Third, if you uncomment them and add the second hyphen, you're still not passing --gc-sections flag to the linker, you're passing it to the compiler (which should have resulted in a error message). If you want to pass the --gc-sections flag to the linker via the gcc command line, you need to use either -W,--gc-sections or -Xlinker --gc-sections That's the point. (or nearly, according to the GC manual, it is -Wl,x (which works) Right. Sorry about the typo. I read the ld documentation and missted the fact that the compiler gets the options first, even if added to LDFLAGS. The ld documentation has no way of knowing what program you're passing LDFLAGS to in your Makefile. Nevertheless, I don't understand why foo() is added to the binary by the linker default, while it is not referenced and in its own object file. Because you didn't pass the --gc-sections flag to the linker to tell it to discard unreferenced sections. With the use of -Wl, I come to this conclusion: 1) without --gc-sections, the linker keeps ALL code passed to it in an object file, no matter whether anything in an object file is referenced or nothing at all. Yes. Thats why I said you have to use both the -ffunction-sections and --gc-sections options. 2) with use of --gc-sections, the linker will ignore any object files content, if nothing in this object file is referenced from outside Yes. 3) using -ffunction-sections AND --gc-sections, the compiler will put any function in its own .text.* (sub)section and the linker will discard any of them which is not referenced, even if in the same object file as other, referenced code. Yes. Since 1) is the default, binary files may be unnecessary large by default. Yes. Thanks for your clarifications. It makes life a bit easier for me (I can skip some #ifdefs now in the modules), now that I know (I think) how it really works. -- Grant Edwards grant.b.edwardsYow! I don't understand at the HUMOUR of the THREE gmail.comSTOOGES!!
Re: [Mspgcc-users] Unused functions occupying unnecessary memory
ihex $(TRGDIR)/$(NAME).elf $(BINDIR)/$(NAME).hex $(NAME).txt : $(NAME).hex $(TITXT) -o $(BINDIR)/$(NAME).txt $(BINDIR)/$(NAME).hex all: $(NAME).txt $(SIZE) $(TRGDIR)/$(NAME).elf ## BLOCK 8) make instruction to delete created files ## clean : $(SRC) $(ASRC) @echo deleting files... $(RM) $(addprefix $(OBJDIR)/,$(OBJ)) $(addprefix $(OBJDIR)/,$(OBJ:.o=.lst)) $(RM) $(TRGDIR)/$(NAME).a $(RM) $(TRGDIR)/$(NAME).elf $(RM) $(TRGDIR)/$(NAME).lst $(RM) $(BINDIR)/$(NAME).hex $(RM) makefile.d @echo rebuilding dependencies... $(CC) -mmcu=$(MCU) -E -MM -I. -I$(INCSRC) $^ makefile.d @echo CLEAN complete. ## calculate dependencies # #makefile.d : $(SRC) $(ASRC) # $(CC) -mmcu=$(MCU) -E -MM -I. -I$(INCSRC) $^ makefile.d # -E stop after preprocessing, output preprocessor output # -M create include rule isntead of preprocessor output # -MM like -M but ignore includes from system directory ## dependecies, add any dependencies you need here ### -include makefile.d if 'dummy.c' is included to the SRC-line, the function foo() is placed into the binary, even if never referenced or used. Based on your explanations, I'd expect it to never appear there (unreachable). Thank you for posting a real example. Now we can figure out what's going on. First, both -ffunction-sections and -gc-sections flags are commented out in your makefile. Second, it's '--gc-sections' not '-gc-sections' Third, if you uncomment them and add the second hyphen, you're still not passing --gc-sections flag to the linker, you're passing it to the compiler (which should have resulted in a error message). If you want to pass the --gc-sections flag to the linker via the gcc command line, you need to use either -W,--gc-sections or -Xlinker --gc-sections -- Grant Edwards grant.b.edwardsYow! I want you to MEMORIZE at the collected poems of gmail.comEDNA ST VINCENT MILLAY ... BACKWARDS!!
Re: [Mspgcc-users] Unused functions occupying unnecessary memory
On 2010-06-21, Grant Edwards grant.b.edwa...@gmail.com wrote: Thank you for posting a real example. Now we can figure out what's going on. First, both -ffunction-sections and -gc-sections flags are commented out in your makefile. Second, it's '--gc-sections' not '-gc-sections' Oops. That one's my fault. I just noticed that I've been typing it incorrectly with a single preceding hyphen during this discussion. Third, if you uncomment them and add the second hyphen, you're still not passing --gc-sections flag to the linker, you're passing it to the compiler (which should have resulted in a error message). If you want to pass the --gc-sections flag to the linker via the gcc command line, you need to use either -W,--gc-sections or -Xlinker --gc-sections -- Grant Edwards grant.b.edwardsYow! Xerox your lunch at and file it under sex gmail.comoffenders!
Re: [Mspgcc-users] Unused functions occupying unnecessary memory
On 2010-06-15, Grant Edwards grant.b.edwa...@gmail.com wrote: On 2010-06-15, JMGross msp...@grossibaer.de wrote: The suggested compiler/linker flags, however, let the compiler treat each function as a separate compilation unit, starting at its own 0-offset address. [...] Also, it keeps the compiler for doing optimizations like common subexpression elimination or using the most efficient way to call functions or access variables, as they are all referenced as externals. I'd also be interested in seeing examples of that. I've only got one MSP430 project laying around at the moment, and it's pretty small: only about 1KB of code. Compiling with -O2 generates the exact same code with -ffunction-sections as it does without. If somebody does come across a situation where -ffunction-sections causes worse (or just different) code to be generated, it would be nice if you could let the list know. Even if there isn't anything we can do to improve the code generation, it will at least allow other mspgcc users to make an intelligent tradeoff decision. -- Grant Edwards grant.b.edwardsYow! ONE LIFE TO LIVE for at ALL MY CHILDREN in ANOTHER gmail.comWORLD all THE DAYS OF OUR LIVES.
Re: [Mspgcc-users] Unused functions occupying unnecessary memory
On 2010-06-18, JMGross msp...@grossibaer.de wrote:
I dug out some older project files and if I understand their old
makefile correctly, all object files were put into a library (.a) and
then this was fed into the linker. So maybe this was the reason for
the missing code if the project object files inside the library
weren't in the right order.
That will indeed cause problems. For pretty much all of the linkers
I've used, libraries were only processed once at the point in the file
list where they were encountered. If an object file later in the list
needs something from a library that has already been processed, that
symbol will go unresolved.
If you do come across a case of -ffunction-sections and -gc-sections
not working, please post it. It should work, and I know for a fact
that it used to.
Following example:
Any project (does not matter which).
Compiled with -ffunction-sections and linked with -gc-sections.
Now add a dummy function
void foo(void){};
After compilation, the function foo is in a segment called .text.foo.
So -ffunction-sections work.
After linking, the function is in the linked binary. Binaries are identical,
no matter whether -gc-sections was used or not.
As I've said, doing that works fine for me.
By post an example I meant provide source files and a makefile the
exhibit the problem so that we can try to fix it.
Onother example. Once again any project. One object file was added to
the project, containing the above function. Again the binaries are
identical, no matter whether -gc-sections was used or not. foo() was
always part of the binary.
Is it possible that if not ld itself then the linker scripts have
been altered in a way that breaks -gc-sections?
That's possible. If you can post an example that fails for you and
works for us, then we can start trying to track down the source of the
problem.
I'd really like to put this kind of options (including optimization
settings) into the appropriate source file only (by a pragma) instead
of having them active for the whole project (unless one wants to make
rather complex makefiles)
yes, that would be nice, but it would be very difficult due to some
fundamental architecture decisions that were made in both gcc and
binutils a long time ago.
Not really.
OK, then submit a patch.
Based on what I've seen from my work on gcc and binutils, it looked
pretty difficult to me. Perhaps my understanding of gcc/binutils
internals isn't as good as yours.
The last fix to gcc for -ffunction-sections -fdata-sections support
went in at the end of May 2008, so I would expect the 12/2008 build of
gcc to work. I'm not sure what ld 060404 means. ld should have
version number like 2.19.3. What I can say is that it worked for me
the last time I tried it, and others have reported it working more
recently.
D:\msp430-ld -v
GNU ld version 060404 20060404
D:\
Hmmm, now that you ask, I checked the file date and it was May 2006.
Looks like I called the wrong one. :(
The ld version that's called by msp430-gcc is
GNU ld (GNU binutils) 2.18
(I checked the makefile output)
I think that should be recent enough.
Yes, if the linker supports changing address modes, then it does
move the following code.
Then it needs to also adjust all symbolic mode accesses,
even local ones which are not subject to relocation.
Quite some work. And requires a lot special knowledge about the
target system structure.
Yes it does. That's why it's supported on a per-target basis and not
all targets have had support for that sort of thing added.
If the linker goes through the object file, analyzes every
instruction (if it is an instruction)... well, why do we have an
assembler stage? :)
Various reasons -- not the least among them is history: when you
first write a compiler, there is often an existing assembler and
linker that you can use.
Well, I'm better safe than sorry and I guess someone else did too.
Why else is this whole -ffunction-sections thing an option and
disabled by default?
Because it's a somewhat new feature and it's not the way people are
used to having things work. When a new feature gets added, it's
usually disabled by default in order to preserve as much
backwards-compatibilty as possible.
Hmmm, backwards compatibility considerations are only neccessary if
something may have unexpected side-effects to the unaware.
The main side-effect is the way sections are named. It's possible
there are side-effects to the way code is optimized, but I've never
seen that.
--
Grant Edwards grant.b.edwardsYow! What's the MATTER
at Sid? ... Is your BEVERAGE
gmail.comunsatisfactory?
Re: [Mspgcc-users] Unused functions occupying unnecessary memory
turned them off, the code didn't fit into the flash. I know I'm probably starting to sound repetitive, but can you provide a real example so that we can try to fix that feature? And I'm certain that the two functions in question are not referenced ever as I just added them to the code. Also, I added some sections/moved the vector table and the code/data in these sections is never referenced anywhere, yet they are still in the binary. (and I do not explicitely keep them in the linker script). I wonder what's (not) going on. It's ld 060404, part of the mspgcc build from 12/2008. The last fix to gcc for -ffunction-sections -fdata-sections support went in at the end of May 2008, so I would expect the 12/2008 build of gcc to work. I'm not sure what ld 060404 means. ld should have version number like 2.19.3. What I can say is that it worked for me the last time I tried it, and others have reported it working more recently. Even more, I think the linker will keep everything I feed it as source file, whether anything in an object file is ever used or not. I normally only include those object files which _are_ in use, but... I just included a completely unrelated file with never-used functions into the makefile and my binary has grown. So what's wrong? I have no way of knowing unless you provide an example. IIRC, the linker will convert long branches into short/relative jumps at link time. At least it does that for all the other targets I use... interesting. Still two wasted bytes (I don't think the linker will move the following code and adjust any other jumps if necessary), Yes, if the linker supports changing address modes, then it does move the following code. but faster. I wonder if this is done for branches with unrelocated destinations or with already linked ones too? I've only personally witnessed it for instructions containing relocated addresses. I'm just curious. Altering the assembly instructions is nothing a linker should do imho. Then don't enable that option. For Gnu binutils it's called --relax. Also, some addressing modes cannot be used under such a setup. I don't understand why. Can you provide an actual example? I'm not sure whether the compiler ever uses relative addressing modes but I doubt this will be usable if the destination is in a different segment. A fixed distance to the destination is the base of relative addressing. And with separate segments there is no such fixed position. Again, stuff like that can be fixed up at link time. Some things like optmizing addressing modes for far/short destinations have to be done at link time instead of compile time, but I don't see how that hurts anything. The linker messes with the addressing modes? It can. That's really new to me. From the ld man page: --relax An option with machine dependent effects. This option is only supported on a few targets. See section ld and the H8/300. See section ld and the Intel 960 family. On some platforms, the --relax' option performs global optimizations that become possible when the linker resolves addressing in the program, such as relaxing address modes and synthesizing new instructions in the output object file. On platforms where this is not supported, --relax' is accepted, but ignored. I'm not sure if this option does anything for the '430 or not. It's possible that nobody has implimented it for the MSP430. On other targets I've used, it would change addressing modes to speed/shorten code at link time. I thought it worked for the '430, but it's possible (probably even) that I'm remembering another target I was using at the same time as the '430. Isn't it just placing the proper relocated addresses into the holes left by the compiler? Sometimes. Well, I'm better safe than sorry and I guess someone else did too. Why else is this whole -ffunction-sections thing an option and disabled by default? Because it's a somewhat new feature and it's not the way people are used to having things work. When a new feature gets added, it's usually disabled by default in order to preserve as much backwards-compatibilty as possible. Maybe I have been too suspicious and I'm sorry if I wasted your time. I'm not an information source for ongoing compiler/linker development anyway sicne I don't use the latest version. In a production environment, an old compiler with known bugs is better than a new one with perhaps unknown bugs (same for embedded OS versions). We made this mistake once and will never do again unless we're really forced to. Also, my boss pays me for working on the projects, not the compiler :) In his opinion, I'm making too many experiments already, wasting too much time (luckily he _needs_ me) -- Grant Edwards grant.b.edwardsYow! Gibble, Gobble, we at ACCEPT YOU ... gmail.com
Re: [Mspgcc-users] Unused functions occupying unnecessary memory
On 2010-06-17, Przemek Klosowski przemek.klosow...@gmail.com wrote: On Thu, Jun 17, 2010 at 3:01 PM, Grant Edwards grant.b.edwa...@gmail.com wrote: On 2010-06-17, JMGross msp...@grossibaer.de wrote: interesting. Still two wasted bytes (I don't think the linker will move the following code and adjust any other jumps if necessary), Yes, if the linker supports changing address modes, then it does move the following code. FWIW, this is a well-known and tricky problem, because you can get circular dependencies: short addressing at location A can only reach site B if site B also uses short addressing, and vice versa. There's a standard algorithm that deals with, for quite some time---I remember first reading about it in the 80s. Yep, IIRC, it's an example of a large class of non-linear problems that includes modelling of physical systems where changes in the state of a node/cell affects the states of other nodes/cells. You try to find the the best overall approximation to a solution using an iterative approach that makes multiple passes through the data until no more improvements can be made. That sort of an agorithm is called a relaxation algorithm. If I'm remembering things correctly from many years ago, one main groups of problems in that class is calculating the final state of an irregular physical structure when the applied stresses are changed. The structure will relax into a new equilibrium state that minimizes overall strain. Or stress. Or something like that. But don't quote me, I'm an EE. Or maybe I'm incorrectly mixing together unrelated things simply because they all use the world relaxation or relax. -- Grant Edwards grant.b.edwardsYow! I was born in a at Hostess Cupcake factory gmail.combefore the sexual revolution!
Re: [Mspgcc-users] Unused functions occupying unnecessary memory
On 2010-06-16, JMGross msp...@grossibaer.de wrote: I had this happen long time ago when I included the different object files or libraries in the wrong order with GCC under linux. After reordering them so that their contend had already been referenced, all was well. I think I had similar problems (immediately solved) with mspgcc. Those problems were with the --gc-sections feature? It sounds to me like you were linking libraries before you linked the object files that referenced the routines in the library. That's a different, unrelated issue. If these compiler flags allow treating different functions in the same files to be kept or discarded depending of whether they are used, it's obvious that they need to be be considered unused when they haven't been referenced yet. The garbage collection algorithm used by the linker shouldn't depend what order you link the object files. If you've got examples where it seems to matter, please post it because that's a bug and needs to be fixed. (It would be pretty useless to have such a feature if it could be inhibited by circular references of dead code.) True, but that doesn't mean that the object files have to be a partially ordered set. Nodes are not discarded based on a reference-count -- they're discarded based on a reachability. Unless the linker has been greatly improved since then, the problem should be there. Maybe I'm wrong. You seem to be assuming a single-pass linker. It works in two passes. First it reads all of the object files. Then it starts at all of the nodes (symbols) marked as keep and traverses the reference graph marking all reachable nodes. When it's done traversing the graph, it discards any nodes that haven't been reached from the initial set of keep nodes. Are you sure you're not thinking about the requirement that libraries be paritially ordered with respect to referencing objects? About the reduced effectiveness of the optimization, this one is obvious. If the linker is allowed to include or discard parts of a compilation unit depending of their usage, the compiler may not do any optimization that crosses the boundary between functions. I'm afraid that's not at all obvious to me. Example: A C file contains two functions: foo() and bar(). foo() is called by various external functions. bar() is called only by foo(). The compiler can inline bar() without causing any problems. Else either common code may disappear when not linked or a reference is generated that will keep the normally unused other function from being excluded from the build. Sorry, you've lost me. I'm not saying it doesn't happen, but I can't visualize it. Do you have an example? Or the common part is referenced by both with a branch (instead of a relative jump), making the code less efficient. IIRC, the linker will convert long branches into short/relative jumps at link time. At least it does that for all the other targets I use... Also, some addressing modes cannot be used under such a setup. I don't understand why. Can you provide an actual example? Optimizations INSIDE a function are not touched, of course. Only those across functions (e.g. identical exit code). The common subexpression elimination was a bad example. (I was a bit in haste when I wrote this, it was at the end of my office hours) Some things like optmizing addressing modes for far/short destinations have to be done at link time instead of compile time, but I don't see how that hurts anything. -- Grant Edwards grant.b.edwardsYow! This ASEXUAL PIG at really BOILS my BLOOD gmail.com... He's so ... so ... URGENT!!
Re: [Mspgcc-users] Unused functions occupying unnecessary memory
On 2010-06-15, Alex Polbach alex.polb...@wimet.es wrote: I have been noticing that a function that is not used by any module in program gets linked anyway, occupying some precious amount of memory. Suppose that you were sharing a common module but you only needed some functions of it. Is there a way to avoid linking all the unused functions? Yes. Add -ffunction-sections to CFLAGS. Then link add --gc-sections to LDFLAGS. If you also want to discard unused variables, add -ffdata-sections to the compiler flags. See the ld and gcc info pages for details. -- Grant Edwards grant.b.edwardsYow! Here I am in 53 at B.C. and all I want is a gmail.comdill pickle!!
Re: [Mspgcc-users] Unused functions occupying unnecessary memory
On 2010-06-15, Grant Edwards grant.b.edwa...@gmail.com wrote: On 2010-06-15, Alex Polbach alex.polb...@wimet.es wrote: I have been noticing that a function that is not used by any module in program gets linked anyway, occupying some precious amount of memory. Suppose that you were sharing a common module but you only needed some functions of it. Is there a way to avoid linking all the unused functions? Yes. Add -ffunction-sections to CFLAGS. Then link add --gc-sections to LDFLAGS. If you also want to discard unused variables, add -ffdata-sections to the compiler flags. See the ld and gcc info pages for details. NB: I haven't tested these options with mspgcc in a long time, but at one point several years ago they worked fine. -- Grant Edwards grant.b.edwardsYow! Excuse me, but didn't at I tell you there's NO HOPE gmail.comfor the survival of OFFSET PRINTING?
Re: [Mspgcc-users] Unused functions occupying unnecessary memory
On 2010-06-15, Alex Polbach alex.polb...@wimet.es wrote:
Thanks a lot for so fast answers!!
I have added both flags to CFLAGS and LDFLAGS and they work just fine.
Very neat solution.
I'm not sure how much those features get used with mspgcc, but I found
them to be invaluable if you want to share code between projects or if
you want to be able to do different builds of a project that have
different features enabled: when you disable (e.g. with #if/#endif) a
function, then all of the code/data that were used only by that
function is automatically left out. IIRC it worked even when you
disable code with if(0) {}.
When I first implemented those features for mspgcc there were obscure
cases where a function would get discarded when it shouldn't have been
due to omissions in the linker script. AFAIK, that shouldn't be a
problem, but it's something to keep it in mind if you get linker
errors due to inexplicably missing symbols: the solution is to mark
the symbol with the KEEP() command in the linker script.
--
Grant Edwards grant.b.edwardsYow! Will it improve my
at CASH FLOW?
gmail.com
Re: [Mspgcc-users] Unused functions occupying unnecessary memory
On 2010-06-15, JMGross msp...@grossibaer.de wrote: The suggested compiler/linker flags, however, let the compiler treat each function as a separate compilation unit, starting at its own 0-offset address. This means teh compiler will not resolve any local references and let it all to the linker. Since all references are passed to the linker, the linker can link or discard every of these sections depending on the open references. What's references from a different module is kept, what's not referenced will be discarded. But it may happen that parts are discarded bwcause not yet referenced by any of the already loaded modules, bu twill be later and then the reference cannot be resolved as the target had been discarded already. If that happens, it's a bug. Can you post an example of that so it can be fixed? Also, it keeps the compiler for doing optimizations like common subexpression elimination or using the most efficient way to call functions or access variables, as they are all referenced as externals. I'd also be interested in seeing examples of that. -- Grant Edwards grant.b.edwardsYow! I'm a nuclear at submarine under the gmail.compolar ice cap and I need a Kleenex!
Re: [Mspgcc-users] Why would mspgcc complain
On 2010-05-20, Paul F. Sehorne p...@sehorne.org wrote:
I removed the double quotes from around {0x79, 0x56, 0x34, 0x12} and
the error is no more. I still don't know why it works with the quotes
with IAR's compiler
If the original code works with the IAR compiler, then that compiler
is broken (and in a rather odd way).
--
Grant
Re: [Mspgcc-users] Why would mspgcc complain
On 2010-05-20, Paul F. Sehorne p...@sehorne.org wrote:
I'm portiing the TI Chronos Sports Watch firmware from IAR. Why would
mspgcc complain error: invalid initializer
[code]
// In smpl_config.h (changed smpl_config.dat to a header file)
#define THIS_DEVICE_ADDRESS {0x79, 0x56, 0x34, 0x12}
// In nwk_types.h
typedef struct
{
uint8_t addr[NET_ADDR_SIZE];
} addr_t;
// In nwk_globals.c
static const addr_t sMyROMAddress = THIS_DEVICE_ADDRESS; // compiler
complains nwk_globals.c:60: error: invalid initializer
[/code]
That's because your initializer is a string, and addr_t isn't a
string. It's a structure.
--
Grant Edwards grant.b.edwardsYow! I think my career
at is ruined!
gmail.com
Re: [Mspgcc-users] problem converting signed short to abs unsigned long
On 2010-02-24, Carl c...@turner.ca wrote:
Sorry, here is the code for the msp430:
#include io.h
int main(void)
{
short x = -32768;
unsigned long y = -x;
LPM0;
}
And same code as my previous posting for the PC:
#include stdio.h
int main()
{
short x = -32768;
unsigned long y = -x;
printf(sizeof short =%d, x=%d, y=%lu\n, sizeof(short), x, y);
}
As you can see there is no int type used.
Yes, there is. The expression '-x' has a type of int. On
the MSP430, that's 16 bits and has a value of 0x8000. When you
assign that to a long, it gets sign-extended to 0x8000.
On the PC, '-x' is 0x8000, and when assigned to a long,
it's still 0x8000.
Don't take this the wrong way, but I think you need a good
introductory book on C.
--
Grant
Re: [Mspgcc-users] problem converting signed short to abs unsigned long
On 2010-02-23, Carl c...@turner.ca wrote:
Ok, I agree not a problem with abs(). But from a C programmer's point of
view there is a difference in the way the msp430 is handling the
calculation/conversion. For example from my PC:
#include stdio.h
int main()
{
short x = -32768;
unsigned long y = -x;
printf(sizeof short =%d, x=%d, y=%lu\n, sizeof(short), x, y);
}
Output: sizeof short =2, x=-32768, y=32768
While on the msp430 it would give:
Output: sizeof short =2, x=-32768, y=4294934528
If the msp430 was treating the operation as on a short I would
expect the msp430 y variable to have a value in the range of a
short as the result.
I'm not sure why there is a difference
The values being passed to printf and then displayed are
unsigned. On the '430, that's 16 bits. On the PC that's 32
bits.
and maybe the PC gcc is not doing the right thing.
They're both doing the right thing.
Do you know where in the C standard it defines the correct
behavior?
Not off the top of my head.
--
Grant Edwards grante Yow! Did something bad
at happen or am I in a
visi.comdrive-in movie??
Re: [Mspgcc-users] problem converting signed short to abs unsigned long
On 2010-02-23, Carl c...@turner.ca wrote: On Tue, 2010-02-23 at 23:08 +, Grant Edwards wrote: The values being passed to printf and then displayed are unsigned. On the '430, that's 16 bits. On the PC that's 32 bits. A short on both my system and 430 is 16 bits. A long on both my system and the 430 are both 32 bits. I can inspect the memory with gdb. The problem is the upper 16 bits of y on the 430 are set. Why does it do this? On PC: (gdb) p sizeof(y) $1 = 4 (gdb) p /x y $2 = 0x8000 On 430: (gdb) p sizeof(y) $1 = 4 (gdb) p /x y $2 = 0x8000 Unless you provide the code that was run up to that point, there's no way to answer your question. But, I suspect that on the msp430, the value in question was an int at some point and then got converted to a long. On the MSP430, that resulted in the value being sign-extended when it got converted from 16 to 32 bits. On a PC, an int and long are both 32 bits, so there is no sign extension when a value is converted from an int to a long. -- Grant Edwards grante Yow! Am I having fun yet? at visi.com
Re: [Mspgcc-users] Size of functions
On 2009-11-18, N. Coesel n...@nctdev.nl wrote: At 15:54 18-11-2009 +, you wrote: On 2009-11-18, David Brown da...@westcontrol.com wrote: N. Coesel wrote: The old security by obscurity trick, that has /such/ a good reputation? Any means of security is security by obscurity by definition. All protections schemes come down to hiding a secret (obscurity). Whether its a key, a secret algorithm, etc. The phrase security by obscurity is normally taken to mean security by hiding the way it works, i.e., trying to hide the code or algorithm. Exactly. Security by obscurity does not refer to the fact that you need to keep a secret key a secret. It refers specifically to the dependance on keeping the design and implementation of the _algorithms_ a secret. Quoting Paul Schneier in _Secrets__Lies_: A good security design has no secrets in its details. In other words, all of the security is in the product itself and its chageable secret: the cryptographic keys, the passwords, the tokens and so forth. The antithesis is _security_by_obscurity_: The details of the system are part of the security. If a system is designed with security by obscurity then that security is delicate. Later in the same book: Again and again in this book I rail against _security_by_ _obscurity_: proprietary cryptography, closed source code, secret operating systems. Security by obscurity doesn't work. Which is big a misconception! History appears to show otherwise. - If you make the way the lock works publicly available then you need a complex lock and a big key. This security measure relies on the key staying hidden and that it will take a long time to pick the lock. - If you keep the way the lock works secret, You can't. At least not for long. you can keep the lock and the key very simple. This security measure relies on keeping both the lock and the key secret. Trying to pick the lock is an almost impossible task. Both methods require keeping a secret. True. So both methods rely on obscurity anyway! But the phrase security by obscurity (at least as it is used in the software and crypto world) refers _specifically_ to the keep the lock design secret method. You can keep a key secret by not telling anyone. To keep a lock secret you have avoid giving a copy of it to anyone -- IOW the only way to keep a lock secret is to never actually use it. So you're right. A secret lock design is effective as long as it is never used. -- Grant Edwards grante Yow! I'm having a at tax-deductible experience! visi.comI need an energy crunch!!
Re: [Mspgcc-users] Developers: Bazaar branches
On 2009-09-29, JMGross msp...@grossibaer.de wrote: That's what I meant with a 'mesh cloud'. It still needs to be stored somewhere. On a single place (that is hopefully available) or on every single system in a copy, constantly updating with the others (who are hopefully online and have a recent version available). Except that's not how a distributed control system works. It's not the case where there are mutliple mirrored copies of a single repository. SVN uses a single repository on a single server, and there is no mechanism to allow the repository stored in multiple places. If it's not stored somewhere, it is not available, no matter which type of distribution is used. In my opinion, a dedicated server (with some backups) is by far better than a repository that is or is not available and is or is not up to date. I don't think you understand how distributed version control systems work. It's not the same as having a repository that's stored in the cloud. The fact that TortoiseSVN (and I guesst SVN itself does so too) keeps a working base together with the (actually altered) working copy makes it a somewhat distributed repository too, Yup, that's how SVN works. You can do a diff/revert using just the local copy but most all of the other operations still require a live connection to the server. DVCS systems don't. as every user has a certain repository revision (not necessary the newes, depending on the latest update) on its computer and can make DIFF or revert operations without any connection to the repository. True. Unfortunately there is no Linux version of Tortoise (only for SVN itself), but since both are compatible and linux users (at least the programmers) are usually fond of console usage... :) Tortoise doesn't really have anything to do with how SVN works, so it doesn't matter whether or not there's a Linux version. The local snapshot is characteristic of the underlying SVN system. There are plenty of other GUI interfaces to SVN, but there are still fundamental differences in the way than a single-reposity system works and the way that a distributed system works. -- Grant
Re: [Mspgcc-users] Developers: Bazaar branches
On 2009-09-28, JMGross msp...@grossibaer.de wrote: Has anyone thought of using SubVersion? I imagine they have. It's not really distributed the way the systems under discussion are. SVN still uses a single central repository that everybody must have fairly constant access to. -- Grant
Re: [Mspgcc-users] Developers: Bazaar branches
On 2009-09-28, JMGross msp...@grossibaer.de wrote: And for the need of a server, well, yes, sure. Every repository needs to be stored somewhere. No, not really. Without access to the storage place I cannot access the repository. No matter whether it is a dedicated server, some webspace somewhere or a mesh cloud. Some other revision control systems don't rely on a single, central server the way RCS, CVS, SVN do. Such systems are usually referred to as distributed revision control systems. Most open-source development projects tend to be moving away from the single-central-server model to the more distributed model. http://en.wikipedia.org/wiki/Distributed_revision_control -- Grant
[Mspgcc-users] Are there any instructions for building binutils/mspgcc?
I've lost the recipe for building binutils/mspgcc. The shell script I've used for the past few years no longer produces a working toolchain. AFAIK, absolutely nothing has changed. But after building binutils and mspgcc on a new machine I'm now getting errors like this: msp430-gcc -g -O2 -mmcu=msp430x149 -Wa,-ahld=main.lst -o main.elf main.c //home/grante/msp430/gnu/bin/../lib/gcc-lib/msp430/3.2.3/msp2/libgcc.a(_copy_data.o): In function `__do_copy_data': /home/grante/msp430/toolchain/src/gcc-3.2.3/gcc/config/msp430/libgcc.S:(.init4+0x2): undefined reference to `__data_size' /home/grante/msp430/toolchain/src/gcc-3.2.3/gcc/config/msp430/libgcc.S:(.init4+0x8): undefined reference to `__data_load_start' //home/grante/msp430/gnu/bin/../lib/gcc-lib/msp430/3.2.3/msp2/libgcc.a(_clear_bss.o): In function `__do_clear_bss': /home/grante/msp430/toolchain/src/gcc-3.2.3/gcc/config/msp430/libgcc.S:(.init4+0x2): undefined reference to `__bss_size' make: *** [main.elf] Error 1 According to http://www.nabble.com/linking-problems-in-linux-%28undefined-symbols%29-td18834672.html those undefined symbols are fixed by this patch: packaging/patches/binutils-14x1-20x1-20x2-20x3-22x4-42x-42x0-461x.patch Except they're not. There's nothing in that patch that adds the undefined symbols. Rather, those symbols appear to be added by binutils-ld_scripts.patch, but I've not been able to get that patch to apply to binutils 2.17. Is there a list somewhere of what patches you need in what order to build what versions of binutils? -- Grant Edwards grante Yow! If elected, Zippy at pledges to each and every visi.comAmerican a 55-year-old houseboy ...
Re: [Mspgcc-users] some stuff missing from stdio ?
On 2009-02-27, Steve DeLaney onramp...@yahoo.com wrote: Hi all, I'm new to mspgcc so bear with me if these topics are repetitive, but The stdio.h seems incomplete - FILE and fopen(), fclose(), etc. appear to be missing. You're using an MSP430 that has a filesystem on it? This is raising havoc with a port I'm working on which is ANSI C. I'm puzzled how a C99 compiler and libc can have a subset of stdio Read up on the sections of the standards about free-standing C implementations. I don't think stdio.h is required at all for a free-standing implementation. any ideas on the best way to resolve it? Write your own filesystem and FILE I/O libraries I guess. [WTH was all that quoted stuff for?]
Re: [Mspgcc-users] IAR Library conversion
On 2009-02-11, Przemek Klosowski przemek.klosow...@gmail.com wrote: I don't know IAR but I suspect that .r43 are the IAR-generated binary object files for MSP430. If that's the case, you are asking how to link them into a GCC project. This depends on the compatibility of the calling convention used by those two compilers---how they pass parameters, which registers they preserve/clobber across procedure calls, etc. In addition to calling convention issues, there are object file format compatibility issues that will need to be resolved. Both are rather tricky problems. -- Grant Edwards grante Yow! Could I have a drug at overdose? visi.com
Re: [Mspgcc-users] MSP430F5438 support
On 2008-12-16, fgd fgarc...@epicom.es wrote: so, has anyone used gdbproxy with the msp430f5438 ? I've been trying to make it work for some days now, both with the linux and windows version of gdbproxy, but all I get is a message saying could not find device (or device not supported)... When I have tried it from windows, it would work with IAR and code composer, but then if I copy the dll's these programs are using and try to make them work with gdbproxy, I get the above message... has anyone else here seen this problem? Yes. I had the same problem with MSP430F24x0. It worked fine with IAR and CC debuggers, but was not supported by gdb-proxy either under Linux or under Windows (not even when using the .dll files taken from the IAR or CC directories). There was no solution. I offered to help troubleshoot/fix the problem, but offers went unacknowledged. I even went so far as to offer to sign an NDA. Again, ignored. TI's customer support is horrible, and the MSP430 JTAG implementation sucks (both the HW in the part and the software tools support). The MSP430 would be a great part if it wasn't so painful to use. -- Grant Edwards grante Yow! Somewhere in Tenafly, at New Jersey, a chiropractor visi.comis viewing Leave it to Beaver!
Re: [Mspgcc-users] The future of mspgcc / newbie questions
On 2008-12-02, p...@plastitar.com p...@plastitar.com wrote: For the second time I'm trying to build the mspgcc toolchain. While trying to get reoriented I read that the key developer of Insight is putting Insight out to pasture. Insight was always rather fragile for me, but I haven't used it for 5+ years. IMO, there is very little future http://sources.redhat.com/ml/insight/2008-q4/msg00014.html I'm not sure what that has to to with the future of mspgcc. What are the pros and cons of using DDD and GNAT/GPS for MSP430's? I do use DDD once every couple years and it always seems to work fine (though Motif is still as ugly as ever). Personally, I prefer gdb's command line. But, I'm old. -- Grant Edwards grante Yow! I just got my PRINCE at bumper sticker ... But now visi.comI can't remember WHO he is ...
[Mspgcc-users] toolchain build script fails due to missing makeinfo
I've been using the same build script to build msp430 gcc toolchains for 5 years, but it recently stopped working because makeinfo is missing: mkdir -p -- ./libiberty Configuring in ./libiberty configure: creating cache ./config.cache checking whether to enable maintainer-specific portions of Makefiles... no checking for makeinfo... /home/grante//toolchain/src/binutils-2.17/missing makeinfo --split-$ configure: WARNING: *** Makeinfo is missing. Info documentation will not be built. checking for perl... perl checking build system type... i686-pc-linux-gnu Then later the make install fails because the .info files are missing. Except makeinfo _isn't_ missing: $ which makeinfo /usr/bin/makeinfo $ makeinfo --version makeinfo (GNU texinfo) 4.11 Copyright (C) 2007 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. I've even run a few .texi files through makeinfo and it generated .info files just fine. Why does the build process think makeinfo is missing? -- Grant Edwards grante Yow! I wish I was a at sex-starved manicurist visi.comfound dead in the Bronx!!
Re: [Mspgcc-users] toolchain build script fails due to missing makeinfo
On 2008-10-28, Grant Edwards gra...@visi.com wrote: I've been using the same build script to build msp430 gcc toolchains for 5 years, but it recently stopped working because makeinfo is missing: mkdir -p -- ./libiberty Configuring in ./libiberty configure: creating cache ./config.cache checking whether to enable maintainer-specific portions of Makefiles... no checking for makeinfo... /home/grante//toolchain/src/binutils-2.17/missing makeinfo --split-$ configure: WARNING: *** Makeinfo is missing. Info documentation will not be built. checking for perl... perl checking build system type... i686-pc-linux-gnu Then later the make install fails because the .info files are missing. Except makeinfo _isn't_ missing: $ which makeinfo /usr/bin/makeinfo $ makeinfo --version makeinfo (GNU texinfo) 4.11 It appears that texinfo 4.11 is broken/incompatible with older configure scripts. I rolled texinfo back to 4.8, and it's building OK. -- Grant Edwards grante Yow! I smell like a wet at reducing clinic on Columbus visi.comDay!
Re: [Mspgcc-users] msp430-gdbproxy support for 2618 device?
On 2008-10-03, Stephen Glow sg...@embeddedintelligence.com wrote: In the end, it turned out that my problem was that gdbproxy simply doesn't support any of the newer devices under Linux. It's been like that for ages. There are parts that are 3 years old that still aren't supported. This is rather disappointing to me, and a clear example of the problems with closed source utilities. Agreed. It's just another example of TI's generally shoddy JTAG support for the msp430. I ended up getting gdbproxy working under a vmware virtual machine running windows. You're lucky. For the part I've been using, even the Windows version of msp-gdbproxy doesn't work, and neither does mstp430-jtag (windows or Linux). :/ -- Grant Edwards grante Yow! The Osmonds! You are at all Osmonds!! Throwing up visi.comon a freeway at dawn!!!
Re: [Mspgcc-users] Software Toggle Example ( fet140_1.S )
On 2008-09-24, Ralf Hildebrandt ralf-hildebra...@gmx.de wrote: Ali Shah wrote: SetupP1: bis.b #0x05, P5DIR; P5.4 output bis.b #0x06, P5DIR; P5.5 output bis.b #0x07, P5DIR; P5.6 output #0x05 == _0101 in binary #0x06 == _0110 in binary #0x07 == _0111 in binary So it seems your intention is bis.b #(BIT4+BIT6+BIT7), P5DIR ; P5.4-6 output BITx are predefined constants in common.h. mov.b #llo(0x), P5OUT ; Toggle off P5 P5OUT is a byte register. mov.b #0xFF, P5OUT ; Toggle off P5 Let me give you one hint: C-Compilers are great. They generate very good code - especially for the MSP430 which is a C-friedly architecture. Secifically, the C compiler knows about bis and bic instructions and will use them when it can. To take the above as an example, this code will generate a single bis instruction: #define Bit(n) (1(n)) P5DIR |= Bit(4)+Bit(5)+Bit(6); -- Grant Edwards grante Yow! I don't know WHY I at said that ... I think it visi.comcame from the FILLINGS in my rear molars ...
Re: [Mspgcc-users] JTAG Security Fuse
On 2008-06-26, Chris Liechti cliec...@gmx.net wrote: burning the fuse required 7V that the adapter must provide. Further, it looks like the TI USB FET won't work. i though it should? msp430-jtag -l TIUSB --secure might work. Once blown, can the chip (and fuse) be erased via JTAG or firmware? the BSL isn't influenced by the security fuse. the fuse can't be repaired, thus the JTAG is permanently disabled. So it really _is_ a fuse. That's in contrast to Atmel's AVR where they call EEPROM cells fuses. Presumably there's some historical reason for Atmel's use of that term, but it sort of makes them sound dumb when they talk about un-blowing a fuse. -- Grant Edwards grante Yow! Hey, waiter! I want at a NEW SHIRT and a PONY TAIL visi.comwith lemon sauce!
Re: [Mspgcc-users] Most Linux-friendly JTAG interface?
On 2008-06-23, Randall Nortman rnmsp...@wonderclown.net wrote: But I guess the question really just boils down to: parallel port, USB, or other? In my experience, parallel port is both cheaper ($15 from sparkfun.com) and easier to get running. However, parallel port doesn't support spy-bi-wire, so there are a few parts which require USB. That said, USB isn't _that_ hard to set up, but it may require a few hours of futzing around with kernel modules and/or udev rules. -- Grant Edwards grante Yow! Are we THERE yet? at visi.com
Re: [Mspgcc-users] Most Linux-friendly JTAG interface?
On 2008-06-23, Andy Warner an...@pobox.com wrote: On Mon, Jun 23, 2008 at 2:13 PM, Randall Nortman rnmsp...@wonderclown.net wrote: I am a complete MSP newbie, though not new to embedded development. I'm just wondering what kind of JTAG interface is most friendly to developing on a Linux host using mspgcc and related tools. Looks like [...] But I guess the question really just boils down to: parallel port, USB, or other? This is going to sound strong, but if you want good linux support, you might want to consider using AVR/arm instead. I'd have to agree that TI's support for JTAG pretty much sucks. I've never been able to get gdb debugging working for the '23x0 chips (even under Windows). I won't even start in on their non-conformance to the IEEE JTAG specs that makes it impossible to set up a proper chain that incorporates an MSP430. -- Grant Edwards grante Yow! Please come home with at me ... I have Tylenol!! visi.com
Re: [Mspgcc-users] GCC 3.3.6 make fail on 'msp430_emit_return'
On 2008-06-20, Greg Hoover ghoo...@greg-web.net wrote: Well apparently GCC 3.2.3 doesn't support i686 darwin -- I get this error: I tried, unsuccessfully and was told that 3.2.3 was the officially Yes, 3.2.3 is the supported version of the cross compiler. It doesn't matter whether 3.2.3 supports i686 darwin -- you're not building it for i686 darwin. You want to build it for the msp430 target. I've never had any problems building gcc 3.2.3 with any gcc 3.x or 4.x host compiler (I'm currently using 4.1.2 to build 3.2.3). -- Grant Edwards grante Yow! Yes, but will I at see the EASTER BUNNY in visi.comskintight leather at an IRON MAIDEN concert?
Re: [Mspgcc-users] Anybody get non-project debugging to work in CCE? [virus checked]
On 2008-06-11, reinhard.gri...@solutions.endress.com reinhard.gri...@solutions.endress.com wrote: What I want to do is: 1) Reset the processor. 2) Start the processor. 3) Stop the processor. 4) Dump out RAM contents in hex. If TI's debugger can't do that, then I'm going to have to declare it a rather large steaming pile If gdb5.1.2 can do memory dumping, then cce20 should do it for you. But AFAIR gdb can dump memory in a reasonable way since 6.x GDB would do just fine. If msp430-gdbproxy supported the F23x0 parts, I'd be set. I'm amazed at what a mess CCE3 is. TI should just throw in the towel and give up on doing their own development tools -- they're obviously incapable of doing a competent job of it when their own FAEs are warning people to stay away from CCE. Maybe I'll see if I can find a copy of cce20. I'm puzzled why IAR has problems with my board. It works fine with an eval board with a processor from the same family, so there must something specific about my board that is causing problems with IAR that doesn't cause problems with msp430-jtag or Elprotronics. I think I'll disconnect our fancy low-voltage reset circuitry to see if that helps. -- Grant Edwards grante Yow! NANCY!! Why is at everything RED?! visi.com
Re: [Mspgcc-users] msp430-gdbproxy support for 2618 device?
On 2008-06-11, Mat Barnes m.barne...@gmail.com wrote: Can anyone tell me if the '2618 device is supported by any version of msp430-gdbproxy? Unless something dramatic has happened recently the newer devices (x2xx and x4xx) are only supported by the lastest Windows build of msp430-gdbproxy. Where can one get the latest build? The version available at soft-switch.org is over two years old. If you're lucky enough to have have a windows installed machine to use as a proxy then connecting to it from gdb is no different to connecting to a locally running proxy. (Of course you can also do all your development and debugging under windows. I could live with using a windows proxy machine with a '23x0, but I can't find a windows build of gdbproxy that supports it either. -- Grant Edwards grante Yow! I haven't been married at in over six years, but we visi.comhad sexual counseling every day from Oral Roberts!!
Re: [Mspgcc-users] msp430-gdbproxy support for 2618 device?
On 2008-06-11, Stephen Glow sg...@embeddedintelligence.com wrote: Can anyone tell me if the '2618 device is supported by any version of msp430-gdbproxy? I've tried the version on the sourceforge page, and also the version on soft-switch.org, but so far I consistently get an error when starting msp430-gdbproxy: ---msp430-gdbproxy msp430 /dev/ttyUSB0 Remote proxy for GDB, v0.7.1, Copyright (C) 1999 Quality Quorum Inc. MSP430 adaption Copyright (C) 2002 Chris Liechti and Steve Underwood GDBproxy comes with ABSOLUTELY NO WARRANTY; for details use `--warranty' option. This is Open Source software. You are welcome to redistribute it under certain conditions. Use the '--copying' option for details. debug: MSP430_Initialize() debug: MSP430_Configure() debug: MSP430_VCC(3000) error: msp430: External power detected (38) debug: MSP430_Identify() error: msp430: Could not find device (or device not supported) (4) debug: MSP430_VCC(0) debug: MSP430_VCC(3000) error: msp430: External power detected (38) debug: MSP430_Reset(ALL_RESETS) debug: MSP430_Close() msp430-gdbproxy: target_msp430.c:746: msp430_open: Assertion `!msp430_status.is_open' failed. Aborted Sorry if this is a dumb question, is it documented someplace that I'm missing? Nope, that's pretty much what I see when I try to use it with the 23x0 parts also. If this processor isn't supported, are there any plans to update gdbproxy to add support for it? I've been trying for almost a year to find out how one goes about getting support for a specific part added to msp430-gdbproxy. AFAICT, the answer is you don't. How are people working with this chip if it's not supported by gdbproxy? I really just need to program the flash, I can live without a debugger if necessary. Try using msp430-jtag to program flash. Even though gdbproxy doesn't support the 23x0 parts, msp430-jtag does. -- Grant Edwards grante Yow! If I had a Q-TIP, I at could prevent th' collapse visi.comof NEGOTIATIONS!!
Re: [Mspgcc-users] msp430-gdbproxy support for 2618 device? [virus checked]
On 2008-06-11, reinhard.gri...@solutions.endress.com reinhard.gri...@solutions.endress.com wrote: : I could live with using a windows proxy machine with a '23x0, but I can't find a windows build of gdbproxy that supports it either. I'm almost sure that the msp430.dll is the culprit who has to detect the MCU type. So go and get the newest version from your JTAG provider. Mine is from Olimex and I have no problem with the 2618 - at least gdbproxy detects it. I tried multiple different versions of msp430.dll that all worked fine with other applications and the same target. I tried .dll files from both IAR Kickstart and Elprotronics. mspgcc-gdbproxy doesn't recogize the '23x0 with either .dll although other applications do recognize it using the same .dll files. -- Grant Edwards grante Yow! I have many CHARTS at and DIAGRAMS.. visi.com
Re: [Mspgcc-users] msp430-gdbproxy support for 2618 device?
On 2008-06-11, Stephen Glow sg...@embeddedintelligence.com wrote: I'm trying to use msp430-jtag under Linux now, but can't seem to get that working either. I'm using a USB based debugger (MSP-FET430UIF from TI). Do you know if that is supported for this chip under Linux, or does msp430-jtag only work with parallel port debuggers for this device? msp430-jtag works with a USB interface, but getting the USB interface installed and working is a bit tricky. You have to get the right version of the kernel/driver, and then you have to set up a few udev rules to reconfigure the USB driver after it first recognizes the device. IIRC, somebody posted a summary of how to do it a few days back. -- Grant Edwards grante Yow! It's OKAY -- I'm an at INTELLECTUAL, too. visi.com
Re: [Mspgcc-users] msp430-gdbproxy support for 2618 device? [virus checked] [virus checked]
On 2008-06-11, reinhard.gri...@solutions.endress.com reinhard.gri...@solutions.endress.com wrote: : I tried multiple different versions of msp430.dll that all worked fine with other applications and the same target. I tried .dll files from both IAR Kickstart and Elprotronics. mspgcc-gdbproxy doesn't recogize the '23x0 with either .dll although other applications do recognize it using the same .dll files. May be the one contained in http://www.olimex.com/dev/soft/msp430/MSP430-DLL%20drivers%201.021.zip will help? I'll give it a try, but it sure looks to me like it's gdbproxy's fault and not the DLL's fault. -- Grant Edwards grante Yow! Are you still an at ALCOHOLIC? visi.com
Re: [Mspgcc-users] msp430-gdbproxy support for 2618 device? [virus checked] [virus checked]
On 2008-06-11, reinhard.gri...@solutions.endress.com reinhard.gri...@solutions.endress.com wrote: I'll give it a try, but it sure looks to me like it's gdbproxy's fault and not the DLL's fault. So, why does my gdbproxy (windows xp) detects the 2618 correctly? Presumably because your copy of gdbproxy supports the 2618? -- Grant Edwards grante Yow! I'm having an at emotional outburst!! visi.com
Re: [Mspgcc-users] Status of Linux gdbproxy
On 2008-06-11, Stephen Glow sg...@embeddedintelligence.com wrote: Does anyone know exactly what the development status of gdbproxy is at the moment? It seems like lots of people are having problems getting the Linux version of this program to work with newer devices. The files on source forge haven't been updated for well over a year. Has this program been abandoned by it's developers? AFAICT, yes. Why exactly is this software closed source anyway? Because TI wants it that way. My guess is that they're ashamed of the details involved and don't want anybody to see them. From what they have documented of their JTAG implimentation it's apparent that it, um, leaves a bit to be desired. I realize there's some sort of NDA involved, but does anyone know what that covers? The JTAG interface seems to be fairly well documented by TI. How can we fix this problem? I've been asking those questions for a long time. I've volunteered to sign an NDA, I've volunteered to test new versions of gdbproxy, I've volunteered to actually work on gdbproxy, I've volunteered to send hardware for which support is desired. I've never gotten any response at all. -- Grant Edwards grante Yow! Somewhere in Tenafly, at New Jersey, a chiropractor visi.comis viewing Leave it to Beaver!
[Mspgcc-users] Use msp430-jtag to dump my program's RAM contents?
I'm trying to figure out how to use msp430-jtag to stop my program and dump out RAM contents so that I can look at the contents of some buffers my program is filling with state info. Uploading from RAM using the --upload option seems to work (it prints out a bunch of hex data), but the data don't look at like the data that my program is writing. Is it not possible to dump out the state of program variables/buffers using msp430-jtag? -- Grant Edwards grante at visi.com
Re: [Mspgcc-users] Use msp430-jtag to dump my program's RAM contents?
On 2008-06-10, Grant Edwards gra...@visi.com wrote: I'm trying to figure out how to use msp430-jtag to stop my program and dump out RAM contents so that I can look at the contents of some buffers my program is filling with state info. Uploading from RAM using the --upload option seems to work (it prints out a bunch of hex data), but the data don't look at like the data that my program is writing. Oh, I should have added that I've verified that using --upload to read flash definitely works. So it sure looks like the act of running jsmp430-jtag is messing with the contents of RAM. -- Grant Edwards grante Yow! I have a very good at DENTAL PLAN. Thank you. visi.com
[Mspgcc-users] IAR EW can't talk to '2330
Since msp430-gdbproxy doesn't support the '23x0 chips, I'm trying to use IAR EW to download and run a hex file that was generated using mspgcc. Downloading the file works fine using either IAR or Elprotronic's programmer. I can talk to the board all day long with msp430-jtag without a single error. However, IAR reports constat communication errors when I try to actually run the program. If I hit retry a few times, the program actually seems to start, and when I stop the program (after a few retries and communication error dialogs, the program coutner is in the right place and the contents of RAM are correct. Any ideas what would cause constant JTAG communication problems for the IAR debugger that wouldn't affect msp430-jtag or the Elprotronic flash programmer? -- Grant Edwards grante Yow! I can't decide which at WRONG TURN to make first!! visi.comI wonder if BOB GUCCIONE has these problems!
