Softblink in NCS/Zephyr

RE: Softblink in NCS/Zephyr

john23094 — Tue, 10 Oct 2023 15:47:45 GMT

Hi Vidar,

That code was really useful thanks very much for that. It's behaving now exactly how I I wanted it!

RE: Softblink in NCS/Zephyr

Vidar Berg — Tue, 10 Oct 2023 11:43:06 GMT

Hi,

I've quickly put together an example using the NRFX PWM driver in case it helps, please see attached.

devzone.nordicsemi.com/.../4848.hello_5F00_world_5F00_pwm_5F00_softblink.zip

Much of the code was copied from the pwm peripheral example in the nRF5 SDK.

RE: Softblink in NCS/Zephyr

john23094 — Tue, 10 Oct 2023 11:07:44 GMT

Hi Vidar,

Power is a concern but CPU availablility is the highest concern at the moment.

I actually read the source code for softblink lib. and saw that actually it was just using a timer and ISR to step and increase the duty cycle which is actually a lot more inefficient than I thought it was.

Yes I actually went on to read the PWM module doc. directly and I can do what I want by configuring it, so I will use it directly.

RE: Softblink in NCS/Zephyr

Vidar Berg — Tue, 10 Oct 2023 11:00:18 GMT

Hi,

There isn't a soft blink implementation in Zephyr that does not require CPU involvement as far as I can tell. Is power consumption a concern in your application? If not, I think the easiest solution will be to implement it with PWM using the nRFX api directly.

Best regards,

Vidar