as of now, FDCANv1 already allows basic functionality on STM32G4xx. However, it is not yet possible to configure the global CKDIV register which is required to change the clock divider for the FDCAN-peripheral. Said CKDIV register can only be written as part of the FDCAN1 interface configuration.
After previous consultation with you, I've written a small patch, allowing for static configuration of aforementioned CKDIV register inside can_lld_init() and added appropriate checks as part of the configuration options, etc.
The patch itself already runs on my system, but there are a few points that could be improved upon depending on your liking:
- Add defines for all possible values of the CKDIV's PDIV field (32 defines in total)
- Autoenable FDCAN1 instead of only checking whether it's enabled
If you want me to, I'll gladly change anything.
Best regards,
preisi
