On Thu, Sep 29, 2011 at 11:38 AM, steve ayer <a...@handhelds.org> wrote:
> hi peter,
>
> that was it!
>
> i assumed that stopping the watchdog in sw (fourth line of the app) was
> enough. damn!
>
It should be, assuming the first three lines are comments or declarations.
The C runtime code is expected to pet the watchdog while it's in control, so
once main is entered you should have close to the full 32ms to chain it up
if you don't want it barking.
If you're getting a watchdog before your code in main() is executed, and
you're not using __init functions or static C++ constructors or overriding
linker sections or otherwise messing with the C runtime code, there's a bug
and I'd like to see a reproducing test case filed on the mspgcc tracker at
http://sourceforge.net/tracker/?atid=432701&group_id=42303&func=browse.
Peter
>
> thanks very much,
>
> steve
>
>
> On 09/29/2011 12:33 PM, Peter Bigot wrote:
>
>> Are you using -mdisable-watchdog, or otherwise stopping the watchdog
>> from resetting your board 32ms after power-up? The current msp430
>> toolchain does not do this automatically like the old one did.
>>
>> Peter
>>
>> On Thu, Sep 29, 2011 at 11:12 AM, steve ayer <a...@handhelds.org
>> <mailto:a...@handhelds.org>> wrote:
>>
>> hi folks,
>>
>> last summer (july 2010) i bought a ti eval board for the 5438 and
>> proceeded to pull together and test the dirt-simple devel pieces before
>> proceeding on to trying to work with tinyos on this mcu.
>>
>> short story is that is used the then-current mspgcc4; wrote my own bsl
>> so that i had a boilerplate for modding tos-bsl to support this mcu;
>> wrote a ~25-line blink in c to test it.
>>
>> result: i could compile, objcopy -> ihex, bsl, and execute blink on
>> the
>> little eval board. nothing elaborate or fancy:
>>
>> msp430-gcc -mmcu=msp430x5438 -o blink.exe blink.c
>> msp430-objcopy --output-target=ihex blink.exe blink.ihex
>> bsl /dev/ttyUSB0 blink.ihex
>>
>> happiness, now i could try out real stuff. then i got sidetracked
>> until
>> now.
>>
>> following all of work of peter bigot, eric decker, razvan, et. al on
>> the
>> uniarch toolchain, i pulled the latest assembled bits (most easily from
>> tinyprod.net <http://tinyprod.net>, thanks guys) and went back to
>>
>> step one.
>>
>> after the requisite header/prototype changes to blink.c, everything
>> seems to work properly, except that the code doesn't run. (yes, i can
>> install the old ihex and make the board blink again).
>>
>> a quick comparison of the working ihex file with the new one i see that
>> they're vaguely similiar, the addresses/sizes of the code/vectors seem
>> right, but...
>>
>> i did try adding the -mcpu=430xv2 flag to the compile line, but that
>> makes no difference in the ihex.
>>
>> can anyone please offer a pointer on how to proceed?
>>
>> thanks,
>>
>> steve ayer
>>
>>
>>
>>
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