How to completely disable PWM in the nRF Connect SDK?

[HauJohn]

I have checked the PWM library in the nRF Connect SDK, and it seems that the library does not support init and deinit functions. The function pwm_set_pulse_dt(&pwm_led, 0) only sets the pulse width to 0, but the PWM module is still running, right? So, if I want to completely deinitialize the PWM module, I need to use the nrfx library, correct?

[Håkon Alseth]

Hi,

Your understanding is correct, the Zephyr PWM API does not have a init/de-init function. 

When setting either 0 or 100% duty cycle, the PWM will effectively be disabled and the GPIO API will be used to either set or clear the pin in question:

https://github.com/nrfconnect/sdk-zephyr/blob/v3.7.99-ncs1/drivers/pwm/pwm_nrfx.c#L197-L202

 

In addition, you can use pm_device API (pm_device_action_run function) to suspend / resume the PWM peripheral.

 

Kind regards,

Håkon