Not able to transmit and receive CAN frames using CANFD classic mode on STM32G0B1CBT3

[vrushalighorpade]

Hi,

I am using STM32G0B1CBT3 controller and would like to send and receive data in classic mode. I have configured all necessary parameters using cubemx but the buffer is getting full when I call this function HAL_FDCAN_AddMessageToTxFifoQ(&hfdcan1, &TxHeader, TxData).

The CAN termination is connected properly.

Following are my configuration settings:

[Saket_Om]

Hello @vrushalighorpade,

For your application, I recommend referring to the example located at Projects/STM32G0C1E-EV/Examples/FDCAN/FDCAN_Classic_Frame_Networking.  It includes a .ioc file for STM32CubeMX, allowing you to easily customize the configuration to suit your specific needs.

[vrushalighorpade]

Hi,

I have  modified .ioc file example file based on my requirement but no success.

[mƎALLEm]

Hello @vrushalighorpade and welcome to the community,

As per your main.c, you are using Normal mode:

 

 hfdcan1.Init.Mode = FDCAN_MODE_NORMAL;

 

1- What board are you using? custom or ST board example: NUCLEO-G0B1?

2- Are you using a CAN transceiver?

3- Did you connect another CAN node on the bus?

4- This CAN timing is not optimized for good operation:

 

 hfdcan1.Init.NominalPrescaler = 16;
 hfdcan1.Init.NominalTimeSeg1 = 3;
 hfdcan1.Init.NominalTimeSeg2 = 4;

 

Your sample point needs to be between 75% and 85%. So please decrease the prescaler as much as possible and increase BS1 and BS2 in such way: BS1 ~= (75% to 85%)x(BS1+BS2).

Please also review this article.

[vrushalighorpade]

Thank You for your reply. Now buffer overflow error is solve by making changes in transceiver but still I am experiencing CAN frame receive and transmit issue.

Not able to transmit and receive CAN frames using CANFD classic mode on STM32G0B1CBT3 

Following are the answers for your questions

1- What board are you using? custom or ST board example: NUCLEO-G0B1?

Ans : I am using custom Board with STM32G0B1CBT3

2- Are you using a CAN transceiver? 

Ans : Yes, TCAN1044AVDRQ1e

3- Did you connect another CAN node on the bus?

Ans : At another end I have connected PCAN USB adapter and checking CAN messages on Busmaster/PCAN View

4- This CAN timing is not optimized for good operation:

Ans : Tried to optimize the prescaler but no success.

Anything else am I missing?

Thank You. 

[vrushalighorpade]

As I am using normal mode and classic frame format is it necessary to configure following parameters for normal mode as well?

 

 

[Karl Yamashita]

Test in loopback mode.

If it works then it's hardware issue. If it doesn't work, then something in your code.