PWM In and Out using same Timer problem

adamajames2 · ‎2008-09-01

Posted on September 02, 2008 at 07:32

adamajames2 · ‎2011-05-17

Posted on May 17, 2011 at 12:43

Hello,

I was/am trying to generate a PWM signal (41KHz) using Timer 2 channel 3 (PWM1) and then for testing read back the signal on channel 2 (PWMI). However the frequency I read using TIM_GetCapture2(TIM2) is always incorrect (it just reads 4). The Duty Cycle I read using TIM_GetCapture1(TIM2) is correct.

I have tried doing all of this using Timer 3 and get the same frequency issue and I've tried different frequencies for the output wave.

I have so far had to use Timer 2 to generate the signal and Timer 3 to read the signal and this works without problem, but does use an extra timer, which i'll probably need later.

Should it be possible? Am I doing something wrong?

Adam