| Author | beginning argument ( Replies received: 2 ) |
| rasmusbunkenborg |
 Posted 19-11-2008 at 10:28 |
Registered on :
11-16-2009
Messages : 3
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Hey
I'm using the stm32f103 and trying to use timer3 as a prescaler for timer1. Everytime timer 3 overflows, it makes timer1 count one up. Or at least that is how I intended it.Usually this works like it should, but sometimes timer1 increased its counter by 2, ,and in rare cases more, instead of just one when timer3 overflows. This I do not understand. could there be something that triggers timer1 besides timer3, or can trgo signal appear out of nowhere? Any hints or ideas are very welcome.
Cheers
Rasmus
[ This message was edited by: rasmusbunkenborg on 19-11-2008 10:36 ]
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| rasmusbunkenborg |
Posted 19-11-2008 at 13:19 |
Registered on :
11-16-2009
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I'm starting to think that the problem is caused by the debugger. I'm using the keil debugger from uvision. It appears that it keeps counting when it reaches a breakpoint. I tried halting the timers through the DBGMCU_CR register, but that doensent seem to work. Do any of you have an idea where i could stop them, or if the plausible that the problem is caused by this.
Regards
Rasmus
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| sjo |
Posted 20-11-2008 at 13:51 |
Registered on :
09-16-2002
From UK
Messages : 624
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Halting the timers through DBGMCU_CR does work in Keil.
Use the provided STM32DBG.ini
Cheers
sjo
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unacceptable timer behaviour