CAN interface between two STM32F373C8 microcontrollers

[Hassanfraz]

Hi, I want to use CAN interface to transfer integer data from one micro controller to another. I am using STM32F373C8 microcontrollers. Please brief me the hardware connection too, from google I understand following.

uC1-------------------uC2

CAN_H----------------CAN_H

CAN_L------------------CAN_L

GND----------------------GND

But in our case we have , CAN_Tx and CAN_Rx pins. I have also swapped the pins for transmission. The boards are placed quite close to each other. I have implemented the ChatGPT code, but it stucks some where in receiving. I am attaching my main file here. Please guide me as soon as possible

[STTwo-32 · Accepted solution]

Hello @Hassanfraz and welcome to the ST Community 😊.

I suggest you to use this exemple as a start for your project. This Can guide you on the configurations of your project. 

PS: don't forget to take a look at the README file of the project.

Best Regards.

STTwo-32 

[Hassanfraz]

Please look at my question again, I think there is any hardware issue. I am not using any discovery board, I have two independent controllers and connections are as below. 

        uC1         ------------------       uC2

CAN_TX(A12)------------------CAN_RX(A11)

CAN_RX(A11)------------------CAN_TX(A12)

GND----------------------GND

Furthermore when i compile the software it struck in the transmit routine, on the following line.

if (HAL_CAN_AddTxMessage(&CanHandle, &TxHeader, TxData, &TxMailbox) != HAL_OK)

{

/* Transmission request Error */

Error_Handler();

}

 Please guide me about the hardware as well.