How to make the FDCAN with DMA.

[Karthick008]

Hi, I'm not able to find any DMA available with CAN peripheral in STM32G4. After going deep search I found there's no such native DMA request available for CAN peripherals. So, I want to know is it true that STM32 controllers don't come with DMA with FDCAN/CAN. If available, then kindly share me the reference for making it work. Since, I want to have fast data transfer, and if I use the FDCAN with interrupt based, it will overload my CPU cycles. Thanks in advance.

[Saket_Om]

Hello @Karthick008

DMA cannot be used with FDCAN on STM32G4 because the peripheral does not provide DMA request lines.

[mƎALLEm]

FDCAN and CAN cannot be used with DMA on all STM32 not specific to STM32G4 family.

 

[Andrew Neil]

Follow-up question: How to handle high-volume FDCAN data without DMA?