I am experiencing an issue with SPI communication on the STM32F746BG microcontroller:Current Setup:SPI2 connected to ADCSPI6 connected to EthernetCurrent Behavior:When testing SPI2 (ADC) alone: Works properlyWhen testing SPI6 (Ethernet) alone: Works properlyWhen using both SPI2 and SPI6 together: SPI2 stops respondingWhen replacing SPI2 with SPI4: Both SPI4 and SPI6 work together properlyQuestion: Why does SPI2 stop responding when used simultaneously with SPI6, while SPI4 works fine in the same configuration?"

Graduate

Question

SPI2 not working on STM32F746BG

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?"

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Super User

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