How to read CAN BUS with STM32F091RC + MCP2551 transreceiver?

[JBond.1]

Hi I am trying to read car CAN BUS with STM32F091RC + MCP2551 transreceiver. All I am getting is empty header and data. I guess my setup is incorrect, anyone can advice how to setup?

This is my setup:

	CAN_TxHeaderTypeDef   TxHeader;
	CAN_RxHeaderTypeDef   RxHeader;
	uint8_t               TxData[8];
	uint8_t               RxData[8];
	uint32_t              TxMailbox;
 
	HAL_CAN_Start(&hcan);
 
  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */
		/* Get RX message */
		if (HAL_CAN_GetRxMessage(&hcan, CAN_RX_FIFO0, &RxHeader, RxData) != HAL_OK)
		{
			/* Reception Error */
			Error_Handler();
		}
		
		if (
			RxData[0] != 0 ||
			RxData[1] != 0 ||
			RxData[2] != 0 ||
			RxData[3] != 0 ||
			RxData[4] != 0 ||
			RxData[5] != 0 ||
			RxData[6] != 0 ||
			RxData[7] != 0 ||
			RxHeader.DLC != 0 ||
			RxHeader.ExtId != 0 ||
			RxHeader.FilterMatchIndex != 0 ||
			RxHeader.IDE != 0 ||
			RxHeader.RTR != 0 ||
			RxHeader.StdId != 0 ||
			RxHeader.Timestamp != 0
		)
		{
			BSP_LED_On(LED2);
		}
  }

[JBond.1]

Any help? I am reading can and getting all zeros when connected to car CAN bus. Why could I get zeroes?

I have connected transreceviver to PB8 and PB9.

[JBond.1]

My code available here:

https://github.com/JuMalIO/CAN

any help?

[JBond.1]

#define HAL_CAN_ERROR_PARAM          (0x00200000U) /*!< Parameter error

As I understand I am getting this error. What does this error mean and how to fix it?

[Tesla DeLorean · Accepted solution]

>>Any help?

Unfortunately multiple degrees of separation in terms of chips, tools, and libraries.

Suspect you'll need to search/grep the library source to understand specifically what is not liked in your parameters, presumably clocks, quanta, or other combination of thing that the library determines to be internally inconsistent.

[JBond.1]

It started working!

I have calculated correct quantas by this video:

https://www.youtube.com/watch?v=rpE5UvQDcy4&list=PLERTijJOmYrApVZqiI6gtA8hr1_6QS-cs&index=14

www.bittiming.can-wiki.info

Does power source matter? Can each CAN node be on different power source? Also different power source for transceiver?

Power source does not matter?

[E.Rosas]

This file is not available on GitHub. Do you still have the files available?