Skip to main content
K
Karthick008
Associate II
July 2, 2025
Solved

How to make the FDCAN with DMA.

  • July 2, 2025
  • 3 replies
  • 495 views

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.

Best answer by Saket_Om

Hello @Karthick008

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

3 replies

S
Saket_OmBest answer
Technical Moderator
July 2, 2025

Hello @Karthick008

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

"To give better visibility on the answered topics, please click on ""Accept as Solution"" on the reply which solved your issue or answered your question.Saket_Om"
    mƎALLEm
    mƎALLEm
    Technical Moderator
    July 2, 2025

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

     

    "To give better visibility on the answered topics, please click on ""Accept as Solution"" on the reply which solved your issue or answered your question."
      Andrew Neil
      Andrew Neil
      Super User
      July 3, 2025

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

      A complex system that works is invariably found to have evolved from a simple system that worked.A complex system designed from scratch never works and cannot be patched up to make it work.
      Terms & ConditionsAccessibility statement