Posted on June 05, 2018 at 17:09Hi,
I have been doing a little work recently with the STM8S003k3 Discovery board, where I attempting to create a 800Hz signal with a 80/20 duty cycle. The issue I am experiencing is that I have no output on the pin!
Now I'm almost certain that loading values etc are correct and this is instead a order of operations issue, with that being said, what is the correct procedure for register configuration etc?
At the moment I am working as follows:
1. Set HSI and enable clock to timer 2
2. Initialise GPIO for input floating no interrupt PB6 & PB7.
3. Initialise GPIO for output push-pull fast mode PD2 (Timer 2 CH3).
4. Set prescaler and set ARR (*MSB first), (**PSCR LSB first).
5. Set CCR3 with value to obtain 80% duty cycle.
6. Set CCER2->CC3P = 0, active high.
7. Set CCMR3->OCM = 6, PWM 1 mode.
8. Set CCER2->CC3E = 1, enable CAPCOM3 output.
9. Set CR1-> CEN = 1, run the timer.
I understand that there is constraints regarding the order in which certain registers can be set which I have tried to avoid.
Can anyone see what I'm missing or suggest some recommendations?
Many Thanks,
A.D
#timer-2 #pwm #stm8s #pwm-configuration
