PWM driven LEDs on Thingy:52

[Grzegorz Blach]

I'm trying to drive LEDs using PWM on Thingy:52 and Zephyr OS. It works when I connect external diodes to GPIOs, but built-in LEDs are connected to I/O expander instead.

Can someone point me how to drive I/O expander pin with PWM?

[ovrebekk]

Hi again

When I started to look into this I realized the sx1509 library currently only allows for setting and clearing pins, not using the PWM functionality built into the sx1509 device. 

A pull request has been created to add this functionality, but it is not yet pulled into the Zephyr master branch:

https://github.com/zephyrproject-rtos/zephyr/pull/28060

There is no exact date set for merging this PR, but according to the developer it should not be very far out. 

Best regards
Torbjørn

[Grzegorz Blach]

This patch does the job. Thanks.

[ovrebekk]

That is good news, I will consider this case resolved then