TIM1 to TIM3 PWM

pietro2 · ‎2012-10-11

Posted on October 11, 2012 at 09:48

Good morning, i'm working with a stm32F0-Discovery board (cortex M0), i need to change the PWM pin from PA8 (using TIM1) to PC8 (using TIM3), but there is a problem because it works wrong.

In the following codes i highlight the changed lines

the working code (with TIM1/PA8) is the ''START CODE'' attached file

and the chaged code is ''NEW CODE'' attached file.

The effect is that if i press the user button (PA0), then on PC8 pin i see a PWM with about 95% dutycyle, and if PA0 is not pressed then there are nothing on PC8 pin.

Can you help me please?

Tesla DeLorean · ‎2012-10-11

Posted on October 12, 2012 at 01:30

PC8 is TIM3_CH3, you need to be programming it as Channel 3, not channel 1

I'm not sure how the DAC1 was paced on TIM1 in the original.

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pietro2 · ‎2012-10-12

Posted on October 12, 2012 at 10:40

thanks clive