STM32F4xx Rework of HAL CAN driver: examples?

[Stefan Meyre]

Posted on February 01, 2018 at 21:39

Hello!

The HAL CAN driver for the STM32F4 got reworked lately (december 2017). I try to port my code from the old to the new drivers (compatibility break). There is a brief driver description in the update history but it would be also very helpful to get some example code to speed up porting ;-). I did look up the Cube STM32F4 sample codes but it seems all the CAN samples got deleted (not yet developed?).... Also the HAL description is still version 5 and the new API is not yet worked in. Correct, or did I miss anything?

Cheers, Stefan

[Levs Levs]

Posted on July 05, 2018 at 19:20

Hello guys,

 will be update this CAN driver also on the STM32F1 firmware package?

Best regards,

Levs

[DTerr]

Not sure about the STM32F1 but I have heard that STM32F0 is due the 17th week of 2019.

[Eich]

Hi !

One additional topic...

Filter configuration also changed a bit, what is the replacement for the "FilterNumber" ? And how can I change the interrupt priority. Could that be still done by HAL_NVIC_SetPriority(CAN2_RX0_IRQn...)?

Regards,

Dirk

[AErns]

Hello Szymon.

I'm struggling to find a very simple and up to date can example, just to see some activity on the Tx pin.

You are talking about a  customers presentation just above, but what do you mean by "Please find it attached"? - I can't see any attachments anywhere.

Regards Allan

[JSzuc]

Hi Szymon!

I try the example on an stm32f103c8t6 and its working fine, but I cant change the filter config to "_IDLIST", Its simply not work anymore in any combination of the mask and id… May be I missed something...

Regards.

J.

[RAlex]

Hi szja681.5541402147734006E12,

I began recently with Microcontroller and STM32 and I stumbled over the same issue.

If you are using a standard-ID ( CAN_TxHeaderTypeDef TxHeader; TxHeader.IDE = CAN_ID_STD;)

and Filterscale 32Bit (sFilterConfig.FilterScale = CAN_FILTERSCALE_32BIT;)

you have to shift FilterIDHigh and FilterMaskIdHigh by 5 Bits to the left.

E.g.

sFilterConfig.FilterIdHigh = 0x0123<<5; 
sFilterConfig.FilterMaskIdHigh = 0x0123<<5;

This is IMO due to the register in the Tx Mailbox.

Here is picture from the STM32F103 Reference Manual .

As you can see the Std-Id is from [31:21].

If you don't shift the Filter ID the comparison will fail.

Because the STD-ID is left justified in the comparing Mailbox.

Here is a pic from the register Organisation.

Mapping is your Mailbox register.I hope this will help someone.

Pictures are taken from the reference manual and are not my property.

Greetings

Rene

[MarcV]

Not sure if anyone is still looking for examples of the new HAL CAN driver like I was just this week. The in my opinion most useful yet simple example can be found here:

https://github.com/timsonater/stm32-CAN-bus-example-HAL-API