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Re: [DEV] STM32G4xx support
Posted: Sun Mar 07, 2021 11:28 pm
by mobyfab
Re: [DEV] STM32G4xx support
Posted: Sun Mar 07, 2021 11:29 pm
by mck1117
Re: [DEV] STM32G4xx support
Posted: Wed Jun 30, 2021 8:43 am
by 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?
Re: [DEV] STM32G4xx support
Posted: Thu Jul 01, 2021 10:31 am
by 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.
Re: [DEV] STM32G4xx support
Posted: Tue Jul 13, 2021 9:04 pm
by Apache
Hey, I'm back with a diff
Re: [DEV] STM32G4xx support
Posted: Tue Jul 13, 2021 9:32 pm
by Giovanni
Apache wrote: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
Re: [DEV] STM32G4xx support
Posted: Fri Jul 16, 2021 11:14 pm
by mck1117
Giovanni wrote:Good work, could you post a patch here?
mck1117 wrote:Giovanni wrote:I've attached a patch to this post - let me know if that works.
any progress on getting the patch merged?
Re: [DEV] STM32G4xx support
Posted: Fri Jul 16, 2021 11:29 pm
by 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?
Re: [DEV] STM32G4xx support
Posted: Fri Jul 16, 2021 11:31 pm
by mck1117
Re: [DEV] STM32G4xx support
Posted: Fri Jul 16, 2021 11:56 pm
by mck1117
Apache wrote: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).
Apache wrote: 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.