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mƎALLEm
mƎALLEmBest answer
ST Technical Moderator
September 30, 2024

Hello @Erice ,

PA11 and PA12 are already used by the USB and this prevents you to use FDCAN on these pins: 

SofLit_0-1727690152386.pngSofLit_1-1727690207567.png

You can use FDCAN on pins PD0 (FDCAN1_Rx) and PD1 (FDCAN1_Tx) on CN9 zio connector:

From the board's user manual:

SofLit_2-1727690420188.png

Hope I answered your question.

 

To give better visibility on the answered topics, please click "Best answer" on the reply which solved your issue or answered your question.
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3 replies

TDK
TDK
September 28, 2024

> PA11 and PA12 are configured to fail in FDCAN1 mode

There's not enough information in your post to be useful.

How to write your question to maximize your chance... - STMicroelectronics Community

 

Perhaps pins are being used by something else. Perhaps the code is insufficient. Perhaps the pins are not hooked up as you think they are. Review the schematic or user manual to verify availability and connectivity.

"If you feel a post has answered your question, please click ""Accept as Solution""."
Imen.D
ST Technical Moderator
September 30, 2024

Hello @Erice ,

Please provide more details on your issue.

Check if you have conflicts with other functions on your board.

When using STM32CubeMX, select PA11 and PA12 in the Pinout View and make sure to use the alternate function FDCAN1_Rx/Tx according to the GPIO you are using (PA11 or PA12).

Please see the following screenshot

ImenD_0-1727688014359.png

PS: I've updated your STM32H7 label to STM32H5 (since you say in the title that you're using STM32H5).

In order to give better visibility on the answered topics, please click on 'Best answer' on the reply which solved your issue or answered your question. Thanks
mƎALLEm
mƎALLEmBest answer
ST Technical Moderator
September 30, 2024

Hello @Erice ,

PA11 and PA12 are already used by the USB and this prevents you to use FDCAN on these pins: 

SofLit_0-1727690152386.pngSofLit_1-1727690207567.png

You can use FDCAN on pins PD0 (FDCAN1_Rx) and PD1 (FDCAN1_Tx) on CN9 zio connector:

From the board's user manual:

SofLit_2-1727690420188.png

Hope I answered your question.

 

To give better visibility on the answered topics, please click "Best answer" on the reply which solved your issue or answered your question.
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