Driving WS2182 with SPIM hangs on second call when led_strip_update_rgb() is inside k_timer callback.

RE: Driving WS2182 with SPIM hangs on second call when led_strip_update_rgb() is inside k_timer callback.

Naeem Maroof — Tue, 20 Jun 2023 14:09:51 GMT

Good to know that it is working and the problem is resolved.

Best wishes,

Naeem

RE: Driving WS2182 with SPIM hangs on second call when led_strip_update_rgb() is inside k_timer callback.

Caver110 — Mon, 19 Jun 2023 17:26:52 GMT

Switching to using k_work_submit() inside my timer callback worked perfectly. LED module is continuously updating correctly on timer expiration. Thank you

RE: Driving WS2182 with SPIM hangs on second call when led_strip_update_rgb() is inside k_timer callback.

Naeem Maroof — Mon, 19 Jun 2023 13:14:41 GMT

Hi Spencer,

Thank you for contacting DevZone at NordicSemi.

I am not 100% sure what is happening in your case. However, this could be related to thread & ISR priorities or conditional execution (or deadlocks) in your led_update_output() function.

An ISR or callback should be designed to carry out simple and quick tasks and the time consuming (or detailed) processing should be offloaded so that kernel's interrupt handling is robust.

This sample code of using timer to submit work in the workqueue should work if you modify your code accordingly.

BR,
Naeem