FDCAN Tranceiver on STM32G0B

[PDeng.1]

Hi all,

I have a CAN 2.0 network up and running with a F407 and some F103. I added a board with a G0B (fdcan). I couldn't get my hands on a FDCAN-tranceiver. I tried to get it working in classic mode (from repository example) with a CAN2.0 tranceiver. I cannot receive any message.

So my question is:

• Is it even possible to configure the G0B to work with a classic CAN2.0 tranceiver?
• If yes, what would the FDCAN config look like

Thank you in advance!

Best regards,

Philipp

[mƎALLEm]

Hello,

You can configure FDCAN in Classic mode (CAN2.0) in STM32 MCUs and use a transceiver throughput up to 1Mb/s, you don’t need FDCAN transceiver in your use case as other CAN nodes are in Classic mode.

The FDCAN frame format configuration in classic mode:

  hfdcan.Init.FrameFormat = FDCAN_FRAME_CLASSIC;

 In the Tx header of the frame to send, you need to disable the bitrate switching and set the frame to classic CAN:

  TxHeader.BitRateSwitch = FDCAN_BRS_OFF;
  TxHeader.FDFormat = FDCAN_CLASSIC_CAN;

Hope that helps you as well as others ..