hi, 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.
-steve On 01/06/2012 01:21 PM, Peter Bigot wrote: > On Fri, Jan 6, 2012 at 12:08 PM, Mark Rages<markra...@gmail.com> wrote: >> Hi, >> >> I have a moderately complex algorithm implemented on the MSP430. >> >> Since profiling is the first step towards optimization, I would like >> to measure the timing of this algorithm in instruction cycles using >> free software. I have looked around before and gotten answers like >> "msp430-gdb has a simulator" but not actually seen an example of how >> it might be used to count instruction cycles. >> >> Has anyone done this before? I would especially appreciate seeing a >> script or Makefile rule as an example of this. > > It's probably possible to get this information from a simulator (mspdebug, > or mspsim; google for refs), but the simplest solution would be to > configure a timer to use SMCLK with the divisors set so it counts MCLK > ticks, and read the timer counter before and after the algorithm executes. > > The test430 > infrastructure<https://sourceforge.net/projects/mspgcc/files/test430/>includes > this feature for most of its supported platforms, though only to > 16-bit counter resolution: more than that would require an interrupt > handler to count rollovers. A basic cycle timer example is in > tests/sanity<http://mspgcc.git.sourceforge.net/git/gitweb.cgi?p=mspgcc/test430;a=blob;f=tests/sanity/test.c;h=643ae58a08da3c692927f284668525fa2038352e;hb=HEAD>. > An example of counter rollover tracking is in the > freqcount<http://mspgcc.git.sourceforge.net/git/gitweb.cgi?p=mspgcc/test430;a=blob;f=demos/launchpad/freqcount/test.c;h=d9190559d0d8a1befaf5f773732112426870a1cb;hb=HEAD>demo > for the launchpad. > > Of course, if you can't run the algorithm without using all available > timers on the MCU, you're back to having to find a simulator. > > Peter > >> >> Regards, >> Mark >> markrages@gmail >> >> > ------------------------------------------------------------------------------ >> 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 > > > > ------------------------------------------------------------------------------ > 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 ------------------------------------------------------------------------------ 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
