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jwz wrote:

Pi 4 SPI lossage.

Dear Lazyweb, any idea why switching from a Pi 3b to a Pi 4b made my MAX7219 start behaving like this? If I switch back, it's behaves properly. Same CF card, so no software differences.

https://jwz.org/b/ykxE

Attachments:

• gifv: 62bedfc637fd9a2a.mp4