I am using the 4 PWMC channels to output to LED's. Each time a PWMC cycle of channel 0 is finished, an interrupt is triggered. In this interrupt, I then write new values to the 4 PWMC channels. What happens is that sometimes, after a while, suddenly one (which one is random) of the 4 PWMC channels stops working - in this case, I can only measure a DC output on the oscilloscope anymore, not a pulse. So it's like the hardware just stopped working.

What could cause the PWMC channel to stop working? Is there some known bug about this? I read somewhere in this forum that the minimum value one should output on the PWMC is not 1, but 2. Is this true?

If anybody could only give me a hint what's wrong here, I'd be endlessly thankful as I am on time pressure and this is driving me mad...

You can't write new values to the PWM registers if their counter is less than 2. If you do, it can censored it up.

This is how I got around it:



Basically just wait until the counter is no longer less than 2.