This is a follow-on to a previous discussion, which discussion quickly
drifted into language-lawyering:
https://www.mail-archive.com/mspgcc-users@lists.sourceforge.net/msg10619.html
I am trying to use the msp430 simulator built into gdb and am having
trouble getting anywhere.
I'm using Ubuntu
Could you try the gdb from the FSF's source tree? It's version 7.7
and has the RH simulator in it. However, I don't think the profiling
results from the RH simulator will be useful to you if you want
cycle-accurate counts, but it will show you every single instruction
being executed.
Also,
I am not concerned about cycles at the moment, just bit-exact simulation of
the CPU.
The msp430-run program looks useful, thank you. (Except the msp430-run
programs packaged by Debian segfault immediately.)
I've compiled gdb-7.7 with --target=msp430 and it works!
Is there any best way to pass
Is there any best way to pass data in / out of the simulator? I
guess I can use the run program and set up a memory region for the
input data, and write a little main() to feed it into through the
algorithm. But if there's an easier way, I'd like to hear about it
before I do it the hard
On Tue, Jun 3, 2014 at 11:57 AM, DJ Delorie d...@redhat.com wrote:
Is there any best way to pass data in / out of the simulator? I
guess I can use the run program and set up a memory region for the
input data, and write a little main() to feed it into through the
algorithm. But if
On Tue, Jun 3, 2014 at 1:10 PM, Mark Rages markra...@gmail.com wrote:
On Tue, Jun 3, 2014 at 11:57 AM, DJ Delorie d...@redhat.com wrote:
Is there any best way to pass data in / out of the simulator? I
guess I can use the run program and set up a memory region for the
input data, and
Wait, a write() syscall made in the msp430 binary can show up on stdout of
the simulator? How does that work? Do I need to link in any special
function for that?
The RH simulator (msp430-elf-run, not msp430-run) supports TI's CIO
interface, at least for write(), which means the RH simulator
You need to be using msp430-elf-gcc for that feature, not mspgcc as
Right, as previously agreed on, we're using msp430-foo for the
non-RH tools, and msp430-elf-foo for the RH tools.
--
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On Tue, Jun 3, 2014 at 1:26 PM, DJ Delorie d...@redhat.com wrote:
Wait, a write() syscall made in the msp430 binary can show up on stdout of
the simulator? How does that work? Do I need to link in any special
function for that?
The RH simulator (msp430-elf-run, not msp430-run) supports
Will TI be providing sufficient documentation on the CIO API that the
msp430 implementation can be completed, thus making the system
interface usable in other frameworks?
I have enough information to finish the msp interface, I've just had
no reason to do so so far. CIO doesn't have exit()
On Tue, Jun 3, 2014 at 1:55 PM, DJ Delorie d...@redhat.com wrote:
Will TI be providing sufficient documentation on the CIO API that the
msp430 implementation can be completed, thus making the system
interface usable in other frameworks?
I have enough information to finish the msp interface,
Is this documented? How can I write drivers to this standard?
That's the catch. It's not documented. I have a sample
implementation from TI that I used (with permission) to write the
simulator/libgloss code.
In general, though, the target side works like this: fill up a
command buffer at
That doesn't really help the rest of us, though.
Yup, I've complained to TI about that. I'll bring it up again.
I'm interfacing with other external hardware including LCDs and FAT
file systems, and I want to re-use the standard libc interface at
the application layer.
Could you elaborate
On Tue, Jun 3, 2014 at 2:55 PM, DJ Delorie d...@redhat.com wrote:
file systems, and I want to re-use the standard libc interface at
the application layer.
Could you elaborate on this? Are you talking about real hardware
talking to real peripherals, or is there a host involved?
I'd already
I'd already outlined my expectations in the earlier thread; see for
example
http://www.mail-archive.com/mspgcc-users@lists.sourceforge.net/msg12038.html.
If the msp430 version supplies a weak definition of _write() (not
write())
newlib uses either write() or _write() depending on which
On Tue, Jun 3, 2014 at 12:55 PM, DJ Delorie d...@redhat.com wrote:
Will TI be providing sufficient documentation on the CIO API that the
msp430 implementation can be completed, thus making the system
interface usable in other frameworks?
I have enough information to finish the msp
Can you elaborate on branch-to-self opcode?
Any branch opcode that branches to itself, i.e. a one-opcode infinite
loop.
1: BR #1b
This also works with any indirect or conditional branch, as long as
the target of the branch is the address of the branch opcode. Here's
the code in the
You can do that with the RH newlib as long as you don't link in
libgloss's versions of the low-level routines - i.e. remove -lgloss
from your link line and add -lbspacm.
To clarify: don't link in -lnosys if you're not compiling with -msim
or don't link in -lsim if you are compiling with -msim
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