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STM32H743 SPI2 waiting affects other RTOS tasks

Question asked by Joerg Wagner on Jan 9, 2018
Latest reply on Jan 20, 2018 by Joerg Wagner

Hello, this concerns CubeH7 1.1.0.

Simple app with 2 FreeRTOS tasks:


task #1 sends data continously via Ethernet

task #2 calls   i.e.

int waiting_time=0x1000;


to receive 10 bytes or whatever.

Thers is no SPI client connected.


The first task is affected by the waiting time and waits as well, no RTOS behaviour anymore !

The delay depends on the waiting time.


This does not happen when using SPI3 (both are identical)



- Joerg -