raspberry pi 4 neopixel spi issue Moderators: adafruit_support_bill, adafruit

[thaamike]

Hi,

I have connected raspberry pi 4 to WS2812 led's using pin gpio 10 (spi). After the first led is written correctly all the other leds go white. I noticed with my scope that the frequency drops from about 800kHz to 400kHz. Sometimes is happens after the 2nd write or 3rd. But the frequency just drops so that the leds see wrong information.

When is use the other GPIO's that are mentioned in the neopixel uber guide i have no problems at all. Only GPIO10 has issues.

Any idea how this could be fixed?