STM32G474RE multiple FDCAN firmware

[KTThomasL]

The STM32G474RE support 3 FDCAN and that fit my design well.  When I checked the nucleo board, the firmware does not have any CAN example.  I searched the ST website, the user, programmer and reference manual do not have any information on the registers and their memory map information.  Although I found “STM32 FDCAN running at 8 Mb/s on Nucleo boards” helpful, it does not give me enough information of the FDCAN 2 & 3’s interrupt vector location, calls, setup and etc.  I need a example template to set up my FDCAN.  Where can I find that?

[Saket_Om]

Hello ​@KTThomasL 

Please refer to the examples below: 

STM32CubeG4/Projects/STM32G474E-EVAL/Examples/FDCAN at master · STMicroelectronics/STM32CubeG4

[mƎALLEm]

Hello ​@KTThomasL and welcome to the ST community,

the user, programmer and reference manual do not have any information on the registers and their memory map

information

The memory mapping is provided in the reference manual RM0440 / Table 3. Memory map and peripheral register boundary addresses

and the FDCAN register description is provided in the same reference manual / Table 421. FDCAN register map and reset values.

As there is no CAN transceiver on that NUCLEO board, no FDCAN example available in Cube package but you can inspire either from the FDCAN examples provided in the CubeHAL with the Eval board or use the knowledge base article: STM32 FDCAN running at 8 Mb/s on NUCLEO boards   and the github hotspot: CKB-STM32-FDCAN-8Mbs

There is no example that shows all 3 FDCAN instances are running at the same time. It's not hard to add another FDCAN instance to the project, that’s the same work to do for all FDCAN instances. 

Hope that helps.