Color instability for ws2812B leds on RPI4B

[aleksas]

Version

1.0.0

Describe the bug

On Raspbery Pi 4b modified code to flicker in a 500 cycle loop from default color (RED) to none (color 0x00) with 8ms delay . Most of the times color goes from red to turned off, but sometimes all leds shine white color for some cycles and then go back to switching between red and off.

pxl-20230427-085501541-4_gHR0oSRA.mp4

Tried to play with SPI speed and one_code / zero_code values without any significant improvement.

Reproduce

App executed using following command:
ws2812b -e write --number 24

Expected behavior

Stable flickering between RED and turning off

Additional context

No response

[libdriver]

It may be related to the timing reset signal, and we have fixed this issue. You can pull and test again.

[aleksas]

Issues still present after update

PXL_20230524_122507975.mp4

It may also be related to this issue/feature in RPI itself