[DEV] STM32G4xx support

[mobyfab]

You can generate a patch directly from github:
https://github.com/ChibiOS/ChibiOS/comp ... dcan.patch

[mck1117]

You can generate a patch directly from github:
https://github.com/ChibiOS/ChibiOS/comp ... dcan.patch

TIL, thanks!

[Apache]

Hello, I created a thread about a problem I have with the FDCAN driver, and I was advised to ask here.

I've been developping an application on nucleo f303k3 which implements bxCAN. I ported the code to nucleo g431 but I'm not able to get a CAN signal out of the chip (other peripherals work fine). It looks like an init or a config problem, because when I try to send a CAN 2.0 frame I always get a MSG_OK, event when the board is not plugged to a tranceiver. I checked the clocks and they seem ok, (using pll clk1 as input of the peripheral). I checked the pins alternate mode, seems ok too. I noticed that the CANTxFrame struct is different in the FDCAN implementation but it should be retro-compatible from what I've seen.

I tried the patch made by mck1117, it fixes some things in the init but it's behaving in the same way. Maybe that's my config that doesn't work?

I used this

Code: Select all

CANConfig const canConfig = {
    .DBTP = 0x100C20,
    .CCCR = 0,
    .TEST = 0,
};

Can anyone help me?

[Apache]

Hi, I managed to solve my problem.

For the record, I had to implement a function fdcan_clock_start that restarts the clock before clearing the INIT bit in the CCCR register. This functions clears the CSR bit and waits for the CSA bit to be cleared.

[Apache]

Hey, I'm back with a diff

[Giovanni]

Hey, I'm back with a diff

Hi,

I think I lost track of all changes... does this patch include everything compared to trunk?

Giovanni

[mck1117]

Good work, could you post a patch here?

I've attached a patch to this post - let me know if that works.

any progress on getting the patch merged?

[russian]

This thread how has two separate patches, not sure what's the relationship between those.

rusEFI cares about https://github.com/ChibiOS/ChibiOS/comp ... dcan.patch right?

[mck1117]

rusEFI cares about https://github.com/ChibiOS/ChibiOS/comp ... dcan.patch right?

correct

[mck1117]

Hey, I'm back with a diff

I just had a look at this diff, and it looks like I actually already made all these changes in my branch, except for adding the call to fdcan_clock_start. Do you really need to add that? It works just fine on an H7 (same IP from Bosch) exactly as it is on my fork (https://github.com/mck1117/chibios/tree/h7-fdcan).

Maybe that's my config that doesn't work?

For one, you need to set both DBTP and NBTP. Be careful: they have different formats.