Posted on November 20, 2015 at 10:00Hi!
I have to generate a PWM that
must be quite closely synced to an external signal of 50 Hz (to avoid any drifts).
From the documentation contents of STM8S008F/K of it using the TIM1 external trigger (ETR) to reset the PWM/Timer counter (and relying on the commutation event to implement some stepwise updates of the PWM) would be the optimal way to go.
Alas, as of my understanding, the STM8S003
F microchip does not have a TIM1 external trigger pin (TIM1_ETR) that can be selected as trigger source.
The alternative would be to rely on high priority interrupts. I would like to avoid this to interfere as little as possible on the other software components (essential decoding of a signal), although at 50Hz that might be negligible - not tested yet.
So my question ultimately being: Did I miss something and there effectively is an pin-in that I can use as trigger source for TIM1 on the chip or is there some other approach to sync the PWM that I do not see?
