SPIslave replies with wrong bytes to SPI master

[JohnnyK (Jan Kamidra)]

Hello,

it seems there is probably a problem with SPI on STM targets

Weird SPISlave behaviour with STM32f767ZI and Raspberry Pi

I have been trying to get SPI communication between an STM32f767ZI Nucleo (slave, MBed v6) and a Raspberry Pi 3B+ (master, Raspbian buster) to work, but have been having issues with incorrect bytes being received/sent. In my test setup, I have SPI1 of the Pi connected to SPI1 of the STM board. I tested the SPI functionality by running a Python script on the Pi (which does 10 transfers with the bytes 0 to 10) and having the STM echo the received bytes. I used 100KHz and mode 0. The following i…

BR, Jan