Output comparison pulse problem

hao · ‎2024-11-14

On the stm32h750, I want to use 4 channels to implement pwm waves with different phases in the output comparison mode of tim8. Chanel's mode selection switches on match. The stages are 0% 25% 50% 75%. When the phase is zero (sConfigOC.Pulse = 1-1), the waveform does not flip, while other channels flip according to the set phase.

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Sarra.S · ‎2024-11-15

Hello @hao, welcome to ST community,

Could you share your TIM8 configuration?

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hao · ‎2024-11-16

My configuration in tim8 is as follows

Sarra.S · ‎2024-11-21

Hello @hao,

For channel1, the counter starts at 0 and immediately matches the compare value (0) -since it's configured as toggle on match- then the counter starts counting up (to reach 999), there is no further match within the same period, and the output remains in its toggled state

Is that clear?

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