STM32 CAN Communication Reliability in Multi-FDCAN Configurations

[tauqirashraf]

Hello everyone,

I am currently working with an STM32G4 series MCU using multiple FDCAN peripherals and would like to hear about other developers' experiences regarding CAN communication reliability and synchronization.

In projects where both FDCAN1 and FDCAN2 are active, have you encountered any challenges related to:

• Clock configuration and synchronization
• Bit timing calculations
• Bus load handling
• Message filtering across multiple instances
• Error recovery and bus-off situations

I'm particularly interested in best practices for configuring multiple FDCAN instances to ensure stable communication in automotive and industrial applications.

Any recommendations, examples, or lessons learned from real-world deployments would be greatly appreciated.

Thank you in advance for sharing your experience

[mƎALLEm]

Hello ​@tauqirashraf and welcome to the ST community,

What I can propose is to refer to this knowledge base articles / links. They are not answering all of your questions but they can help.

 

Bit Timing Calculator for CAN FD

Good luck