Help with CAN Communication on STM32H753ZI (Nucleo/Custom Board)

[Harish__123]

Hello everyone,

I am working with an STM32H753ZI board and I want to set up CAN communication. I’m a bit confused about what changes I need to make.

Here are my main questions:

1. Does the STM32H753ZI use the regular CAN peripheral or the newer FDCAN peripheral?

2. In CubeMX, which settings (baud rate, prescaler, seg1, seg2, etc.) are recommended for 500 kbps?

3. Since the H753ZI board doesn’t have an onboard CAN transceiver, which external transceiver IC (e.g., MCP2551, SN65HVD230, TJA1050, etc.) would be best to use with it?

4. Are there any example CubeIDE projects or reference codes specifically for CAN/FDCAN on the STM32H7 series?

5. How to setup the pinout  configuration and clock configuration.

I want to make sure I configure the peripheral and wiring correctly before testing. Any guidance, example code, or links to reference materials would be greatly appreciated.

Thanks in advance!

[mƎALLEm]

Hello and welcome to the community.

Many questions to answer here.. Not obvious to give all the details but I can help. Next time better to split different questions in different thread.

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1.Does the STM32H753ZI use the regular CAN peripheral or the newer FDCAN peripheral?

Answer: You can configure FDCAN in Classical mode: see this example in Cube HAL: https://github.com/STMicroelectronics/STM32CubeH7/tree/master/Projects/STM32H743I-EVAL/Examples/FDCAN/FDCAN_Classic_Frame_Networking

2- In CubeMX, which settings (baud rate, prescaler, seg1, seg2, etc.) are recommended for 500 kbps?

I propose to read this article for Classical CAN communication: How to use FDCAN to create a simple communication with a basic filter

For FDCAN communication: STM32 FDCAN running at 8 Mb/s on NUCLEO boards

3- Since the H753ZI board doesn’t have an onboard CAN transceiver, which external transceiver IC (e.g., MCP2551, SN65HVD230, TJA1050, etc.) would be best to use with it?

Answer: SN65HVD230 is more suitable as it's 3.3V tranceiver. But MCP2551 could be used (you need to ensure its VIHmin level of 2V for the transmit)

4- Are there any example CubeIDE projects or reference codes specifically for CAN/FDCAN on the STM32H7 series?

Answer: Yes: See: https://github.com/STMicroelectronics/STM32CubeH7/tree/master/Projects/STM32H743I-EVAL/Examples/FDCAN

5- How to setup the pinout  configuration and clock configuration.

Answer: You need to activate the FDCAN peripheral, there will be two pins that will be activated/configured automatically. If you need to change them you need to do it in the Pinout view.

You need also to use HSE either with a crystal or another source like STLINK-MCO: please read this article: How to use STLINK-V3 MCO output on Nucleo boards as a precise clock source for STM32 

Hope I answered all your questions.