How to change the pwm duty every period in nrf52 connect?

RE: How to change the pwm duty every period in nrf52 connect?

JILUNGIE — Thu, 24 Aug 2023 13:51:41 GMT

Thank you for letting me know!

RE: How to change the pwm duty every period in nrf52 connect?

JamesDougherty — Thu, 24 Aug 2023 12:15:28 GMT

Hello - That sample he linked is a Zephyr project. We're using a very similar approach for our motor and display drivers. NRFX is supported in Zephyr and that's what you need to use to get the functionality you're after. However, if you're looking for a pure native Zephyr API example, then you can take a look at the blinky_pwm example https://github.com/zephyrproject-rtos/zephyr/tree/main/samples/basic/blinky_pwm. That example shows the limitation of the Zephyr PWM as you can only set the period for all channels at once and not individual channels. The Zephyr PWM driver does use the same NRFX API that Jared linked to, you can see the driver code here https://github.com/zephyrproject-rtos/zephyr/blob/main/drivers/pwm/pwm_nrfx.c. If you want to set the period for individual channels, then you need to use NRFX directly.

RE: How to change the pwm duty every period in nrf52 connect?

JILUNGIE — Thu, 24 Aug 2023 11:26:03 GMT

Thank you, do you have a sample using zephyr api??

RE: How to change the pwm duty every period in nrf52 connect?

Jared — Thu, 24 Aug 2023 10:23:42 GMT

Hi there,

Here is sample that saves duty cycles in an array and then play it as a PWM sequence,

You can use that sample as a reference,

regards

Jared