SPI2 not working on STM32F746BG

[zin10]

I am experiencing an issue with SPI communication on the STM32F746BG microcontroller:

• Current Setup:
  • SPI2 connected to ADC
  • SPI6 connected to Ethernet
• Current Behavior:
  • When testing SPI2 (ADC) alone: Works properly
  • When testing SPI6 (Ethernet) alone: Works properly
  • When using both SPI2 and SPI6 together: SPI2 stops responding
  • When replacing SPI2 with SPI4: Both SPI4 and SPI6 work together properly

Question: Why does SPI2 stop responding when used simultaneously with SPI6, while SPI4 works fine in the same configuration?"

[TDK]

Probably a bug in the code. Perhaps interrupts are overloading the system, or DMA is out of bandwidth, or some other issue.