PWM led pin configuration

RE: PWM led pin configuration

AndyM — Tue, 10 Oct 2023 13:47:50 GMT

Update

There problem was that one of the LED pins had an overlapping assignment with another component
After that got resolved the PWM works just fine with the LEDs

Thank you for help

RE: PWM led pin configuration

Øivind — Mon, 09 Oct 2023 15:53:19 GMT

Hi,

For that api, you want the device to be the node containing:

compatible = "pwm-leds";

which is the parent node.

You need CONFIG_LED=y and CONFIG_PWM=y

You can also try using DEVICE_DT_GET() instead of device_get_binding(). DEVICE_DT_GET() needs the node identifier for the pwmleds node.

RE: PWM led pin configuration

AndyM — Fri, 06 Oct 2023 14:21:29 GMT

My bad, the API call made is

led_on(_led_pwm, led_num);

Anything in the schematics and the dts or dtsi that jumps out?

What are my options to troubleshoot?

Thank you

RE: PWM led pin configuration

Øivind — Fri, 06 Oct 2023 13:36:50 GMT

Hi,

led_set_brightness() is probably not from the api you want to use.
Take a look at the sample at zephyr/samples/basic/blinky_pwm
And the api in zephyr/include/zephyr/drivers/pwm.h