Posted on May 24, 2018 at 03:42
Hello everyone, I am using STM32F072C8 with MAX3051 CAN BUS transceiver to gather CAN bus data from a vehicle.
Below is the main part ofmycode.
while (1)
{
main_counter++;
sprintf(print_buf1, '\r\n%d | main_counter: %d | interrupt_counter: %d |',data1,main_counter,interrupt_counter);
HAL_USART_Transmit(&husart1, print_buf1, sizeof(print_buf1), HAL_MAX_DELAY);
}
void HAL_CAN_RxCpltCallback(CAN_HandleTypeDef *hcan)
{
if (hcan->pRxMsg->StdId == 0x102)
{
interrupt_counter++;
data1 = hcan->pRxMsg->Data[3];
}
if (HAL_CAN_Receive_IT(hcan, CAN_FIFO0) != HAL_OK)
{
Error_Handler();
}
}�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?�?
The code works fine as I have tested it with several vehicles.
However, it does not work with this vehicle model that I recently tested. The CAN Bus interrupt stop working causing the data not to be updated. I have checked the vehicle's CAN Bus data structure using a CAN Bus tool and it is the same with past vehicles that I have worked with.
Below is the serial monitor output for working interrupt:
87| main_counter: 1 | interrupt_counter:6|
87
| main_counter:2| interrupt_counter: 11 |
88
| main_counter:3| interrupt_counter:16|
88
| main_counter:4| interrupt_counter:21|
89
| main_counter:5| interrupt_counter:26|
89 | main_counter: 6 | interrupt_counter: 31 |
.. and so on
Below is the serial monitor outputwhen the interrupt stop working:
87| main_counter: 1 | interrupt_counter:6|
87
| main_counter:2| interrupt_counter: 11 |
88
| main_counter:3| interrupt_counter:16|
88
| main_counter:4| interrupt_counter:16|
88
| main_counter:5| interrupt_counter:
16
|
88 | main_counter: 6 | interrupt_counter:16 |
... and so on
So I was wonderingwhy the interrupt stop working after a few moment. Could this be a firmware issue? Is there anyway to reset the interrupt in the main loop? Thank you for reading.
#can-bus #canbus
