RE: nrfx pwm PERIODEND Event missing

JasonJibrail — Thu, 15 May 2025 09:16:55 GMT

Thanks Kenneth,

I might try this - for now I've used the EGU and PPI to accomplish what I needed

RE: nrfx pwm PERIODEND Event missing

Kenneth — Tue, 13 May 2025 11:50:15 GMT

Hello,

I guess you would need to use the nrfx_pwm api directly (instead of the zephyr pwm or pwm_nrfx api).

There is possible starting example here:
https://github.com/too1/ncs-nrfx-pwm-simple-example/blob/master/src/main.c

I expect you need to add the pwm callback to the nrfx_pwm_init, e.g.:

irq_enable(PWM1_IRQn);

nrfx_pwm_init(&my_pwm, &config0, pwm_isr_handler, NULL);

ISR_DIRECT_DECLARE(pwm_isr_handler)
{
  nrfx_pwm_irq_handler();
  ISR_DIRECT_PM();
}
void nrfx_pwm_irq_handler() {
...
  if (nrf_pwm_event_check(NRF_PWM1, NRF_PWM_EVENT_PWMPERIODEND)) {
   nrf_pwm_event_clear(NRF_PWM1, NRF_PWM_EVENT_PWMPERIODEND);
...
}
}

Not tested, but something like that,
Kenneth