How to overcome FIFO overrun error in CAN communication?

[Ss.61]

Hellow sir/madam,

• I am using stm32f042g6(controller)
• In my CAN communication transmission is working fine but in receiver section i enabled Interrrupt to receive msg's,
• In that i am facing FIFO overrun error <Error Code:0x00000200> after few times of reception process,

{ HAL_CAN_ERROR_FOV0     (0x00000200U) /*!< FIFO0 overrun error */ }

• Help me how to overcome the error / how to reset the FIFO buffer after one reception process completed.

[Javier1]

show us some code.

It would be nice to see the interrupt function youre triggering with the canbus reception and if youre really reading the fifo.

[Ss.61]

Thank you for your response,

• Here is the code i am using this is nothing but simple can rx example

CAN RX EXAMPLE

/* Includes ------------------------------------------------------------------*/

#include "main.h"

#include "stm32f0xx_hal.h"

/* USER CODE BEGIN Includes */

/* USER CODE END Includes */

/* Private variables ---------------------------------------------------------*/

CAN_HandleTypeDef hcan;

static CanTxMsgTypeDef    TxMessage;

static CanRxMsgTypeDef    RxMessage;

/* USER CODE BEGIN PV */

/* Private variables ---------------------------------------------------------*/

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/

void SystemClock_Config(void);

static void MX_GPIO_Init(void);

static void MX_CAN_Init(void);

/* USER CODE BEGIN PFP */

/* Private function prototypes -----------------------------------------------*/

/* USER CODE END PFP */

/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

int main(void)

{

 /* USER CODE BEGIN 1 */

 /* USER CODE END 1 */

 /* MCU Configuration----------------------------------------------------------*/

 /* Reset of all peripherals, Initializes the Flash interface and the Systick. */

 HAL_Init();

 /* USER CODE BEGIN Init */

 /* USER CODE END Init */

 /* Configure the system clock */

 SystemClock_Config();

 /* USER CODE BEGIN SysInit */

 /* USER CODE END SysInit */

 /* Initialize all configured peripherals */

 MX_GPIO_Init();

 MX_CAN_Init();

 /* USER CODE BEGIN 2 */

 hcan.Instance->MCR = 0x60; //IMPORTANT FOR DEBUG!!!!!!!

 /* Receive interrupt enable */

 if (HAL_CAN_Receive_IT(&hcan, CAN_FIFO0) != HAL_OK)

 {

  Error_Handler();

 }

 /* USER CODE END 2 */

 /* Infinite loop */

 /* USER CODE BEGIN WHILE */

 while (1)

 {

 /* USER CODE END WHILE */

 /* USER CODE BEGIN 3 */

 }

 /* USER CODE END 3 */

}

/**

 * @brief System Clock Configuration

 * @retval None

 */

void SystemClock_Config(void)

{

 RCC_OscInitTypeDef RCC_OscInitStruct;

 RCC_ClkInitTypeDef RCC_ClkInitStruct;

  /**Initializes the CPU, AHB and APB busses clocks 

  */

 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48;

 RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;

 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;

 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)

 {

  _Error_Handler(__FILE__, __LINE__);

 }

  /**Initializes the CPU, AHB and APB busses clocks 

  */

 RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK

               |RCC_CLOCKTYPE_PCLK1;

 RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI48;

 RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;

 RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;

 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)

 {

  _Error_Handler(__FILE__, __LINE__);

 }

  /**Configure the Systick interrupt time 

  */

 HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);

  /**Configure the Systick 

  */

 HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

 /* SysTick_IRQn interrupt configuration */

 HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);

}

/* CAN init function */

static void MX_CAN_Init(void)

{

 CAN_FilterConfTypeDef sFilterConfig;

 static CanTxMsgTypeDef    TxMessage;

 static CanRxMsgTypeDef    RxMessage;

 hcan.Instance = CAN;

 hcan.Init.Prescaler = 6;

 hcan.Init.Mode = CAN_MODE_NORMAL;

 hcan.Init.SJW = CAN_SJW_1TQ;

 hcan.Init.BS1 = CAN_BS1_13TQ;

 hcan.Init.BS2 = CAN_BS2_2TQ;

 hcan.Init.TTCM = DISABLE;

 hcan.Init.ABOM = DISABLE;

 hcan.Init.AWUM = DISABLE;

 hcan.Init.NART = DISABLE;

 hcan.Init.RFLM = DISABLE;

 hcan.Init.TXFP = DISABLE;

 if (HAL_CAN_Init(&hcan) != HAL_OK)

 {

  _Error_Handler(__FILE__, __LINE__);

 }

hcan.pTxMsg = &TxMessage;

hcan.pRxMsg = &RxMessage;

/*##-2- Configure the CAN Filter ###########################################*/

 sFilterConfig.FilterNumber = 0;

 sFilterConfig.FilterMode = CAN_FILTERMODE_IDMASK;

 sFilterConfig.FilterScale = CAN_FILTERSCALE_32BIT;

 sFilterConfig.FilterIdHigh = 0x0000;

 sFilterConfig.FilterIdLow = 0x0000;

 sFilterConfig.FilterMaskIdHigh = 0x0000;

 sFilterConfig.FilterMaskIdLow = 0x0000;

 sFilterConfig.FilterFIFOAssignment = 0;

 sFilterConfig.FilterActivation = ENABLE;

 sFilterConfig.BankNumber = 14;

if (HAL_CAN_ConfigFilter(&hcan, &sFilterConfig) != HAL_OK)

 {

 /* Filter configuration Error */

 Error_Handler();

 }

 hcan.pTxMsg->StdId = 0x100;

 hcan.pTxMsg->ExtId = 0x01;

 hcan.pTxMsg->RTR = CAN_RTR_DATA;

 hcan.pTxMsg->IDE = CAN_ID_STD;

 hcan.pTxMsg->DLC = 0;

// hcan.pTxMsg->Data[0] = 0;  

}

/** Pinout Configuration

*/

static void MX_GPIO_Init(void)

{

 /* GPIO Ports Clock Enable */

 __HAL_RCC_GPIOA_CLK_ENABLE();

}

/* USER CODE BEGIN 4 */

//Receive all msg's through interrupt...

void HAL_CAN_RxCpltCallback(CAN_HandleTypeDef* hcan)

{

 if (HAL_CAN_Receive_IT(hcan, CAN_FIFO0) != HAL_OK)      //it troughs error or hang this function itself once after 2 or 3 reception completed..

 {

  status=0;

  Error_Handler();

 } 

}

/* USER CODE END 4 */

/**

 * @brief This function is executed in case of error occurrence.

 * @param file: The file name as string.

 * @param line: The line in file as a number.

 * @retval None

 */

void _Error_Handler(char *file, int line)

{

 /* USER CODE BEGIN Error_Handler_Debug */

 /* User can add his own implementation to report the HAL error return state */

 /* USER CODE END Error_Handler_Debug */

}

#ifdef USE_FULL_ASSERT

/**

 * @brief Reports the name of the source file and the source line number

 *     where the assert_param error has occurred.

 * @param file: pointer to the source file name

 * @param line: assert_param error line source number

 * @retval None

 */

void assert_failed(uint8_t* file, uint32_t line)

{ 

 /* USER CODE BEGIN 6 */

 /* User can add his own implementation to report the file name and line number,

   tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

 /* USER CODE END 6 */

}

#endif /* USE_FULL_ASSERT */

/**

 * @}

 */

/**

 * @}

 */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

[Javier1]

Next time try to use the code format </> button, its easier to read :

CAN RX EXAMPLE

 
/* Includes ------------------------------------------------------------------*/
 
#include "main.h"
 
#include "stm32f0xx_hal.h"
 
 
 
/* USER CODE BEGIN Includes */
 
 
 
/* USER CODE END Includes */
 
 
 
/* Private variables ---------------------------------------------------------*/
 
CAN_HandleTypeDef hcan;
 
static CanTxMsgTypeDef    TxMessage;
 
static CanRxMsgTypeDef    RxMessage;
 
/* USER CODE BEGIN PV */
 
/* Private variables ---------------------------------------------------------*/
 
 
 
/* USER CODE END PV */
 
 
 
/* Private function prototypes -----------------------------------------------*/
 
void SystemClock_Config(void);
 
static void MX_GPIO_Init(void);
 
static void MX_CAN_Init(void);
 
 
 
/* USER CODE BEGIN PFP */
 
/* Private function prototypes -----------------------------------------------*/
 
 
 
/* USER CODE END PFP */
 
 
 
/* USER CODE BEGIN 0 */
 
 
 
/* USER CODE END 0 */
 
 
 
int main(void)
 
{
 
 /* USER CODE BEGIN 1 */
 
 
 
 /* USER CODE END 1 */
 
 
 
 /* MCU Configuration----------------------------------------------------------*/
 
 
 
 /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
 
 HAL_Init();
 
 
 
 /* USER CODE BEGIN Init */
 
 
 
 /* USER CODE END Init */
 
 
 
 /* Configure the system clock */
 
 SystemClock_Config();
 
 
 
 /* USER CODE BEGIN SysInit */
 
 
 
 /* USER CODE END SysInit */
 
 
 
 /* Initialize all configured peripherals */
 
 MX_GPIO_Init();
 
 MX_CAN_Init();
 
 /* USER CODE BEGIN 2 */
 
 
 
 hcan.Instance->MCR = 0x60; //IMPORTANT FOR DEBUG!!!!!!!
 
 
 
 /* Receive interrupt enable */
 
 if (HAL_CAN_Receive_IT(&hcan, CAN_FIFO0) != HAL_OK)
 
 {
 
   
 
  Error_Handler();
 
 }
 
 
 
 /* USER CODE END 2 */
 
 
 
 /* Infinite loop */
 
 /* USER CODE BEGIN WHILE */
 
 while (1)
 
 {
 
 
 
 /* USER CODE END WHILE */
 
 
 
 /* USER CODE BEGIN 3 */
 
 
 
 }
 
 /* USER CODE END 3 */
 
 
 
}
 
 
 
/**
 
 * @brief System Clock Configuration
 
 * @retval None
 
 */
 
void SystemClock_Config(void)
 
{
 
 
 
 RCC_OscInitTypeDef RCC_OscInitStruct;
 
 RCC_ClkInitTypeDef RCC_ClkInitStruct;
 
 
 
  /**Initializes the CPU, AHB and APB busses clocks 
 
  */
 
 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI48;
 
 RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
 
 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
 
 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
 
 {
 
  _Error_Handler(__FILE__, __LINE__);
 
 }
 
 
 
  /**Initializes the CPU, AHB and APB busses clocks 
 
  */
 
 RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
 
               |RCC_CLOCKTYPE_PCLK1;
 
 RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI48;
 
 RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
 
 RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
 
 
 
 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
 
 {
 
  _Error_Handler(__FILE__, __LINE__);
 
 }
 
 
 
  /**Configure the Systick interrupt time 
 
  */
 
 HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
 
 
 
  /**Configure the Systick 
 
  */
 
 HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
 
 
 
 /* SysTick_IRQn interrupt configuration */
 
 HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
 
}
 
 
 
/* CAN init function */
 
static void MX_CAN_Init(void)
 
{
 
 CAN_FilterConfTypeDef sFilterConfig;
 
 static CanTxMsgTypeDef    TxMessage;
 
 static CanRxMsgTypeDef    RxMessage;
 
 hcan.Instance = CAN;
 
 hcan.Init.Prescaler = 6;
 
 hcan.Init.Mode = CAN_MODE_NORMAL;
 
 hcan.Init.SJW = CAN_SJW_1TQ;
 
 hcan.Init.BS1 = CAN_BS1_13TQ;
 
 hcan.Init.BS2 = CAN_BS2_2TQ;
 
 hcan.Init.TTCM = DISABLE;
 
 hcan.Init.ABOM = DISABLE;
 
 hcan.Init.AWUM = DISABLE;
 
 hcan.Init.NART = DISABLE;
 
 hcan.Init.RFLM = DISABLE;
 
 hcan.Init.TXFP = DISABLE;
 
 if (HAL_CAN_Init(&hcan) != HAL_OK)
 
 {
 
  _Error_Handler(__FILE__, __LINE__);
 
 }
 
hcan.pTxMsg = &TxMessage;
 
hcan.pRxMsg = &RxMessage;
 
/*##-2- Configure the CAN Filter ###########################################*/
 
 sFilterConfig.FilterNumber = 0;
 
 sFilterConfig.FilterMode = CAN_FILTERMODE_IDMASK;
 
 sFilterConfig.FilterScale = CAN_FILTERSCALE_32BIT;
 
 sFilterConfig.FilterIdHigh = 0x0000;
 
 sFilterConfig.FilterIdLow = 0x0000;
 
 sFilterConfig.FilterMaskIdHigh = 0x0000;
 
 sFilterConfig.FilterMaskIdLow = 0x0000;
 
 sFilterConfig.FilterFIFOAssignment = 0;
 
 sFilterConfig.FilterActivation = ENABLE;
 
 sFilterConfig.BankNumber = 14;
 
if (HAL_CAN_ConfigFilter(&hcan, &sFilterConfig) != HAL_OK)
 
 {
 
 /* Filter configuration Error */
 
 Error_Handler();
 
 }
 
 
 
 hcan.pTxMsg->StdId = 0x100;
 
 hcan.pTxMsg->ExtId = 0x01;
 
 hcan.pTxMsg->RTR = CAN_RTR_DATA;
 
 hcan.pTxMsg->IDE = CAN_ID_STD;
 
 hcan.pTxMsg->DLC = 0;
 
// hcan.pTxMsg->Data[0] = 0;  
 
 
 
}
 
 
 
/** Pinout Configuration
 
*/
 
static void MX_GPIO_Init(void)
 
{
 
 
 
 /* GPIO Ports Clock Enable */
 
 __HAL_RCC_GPIOA_CLK_ENABLE();
 
 
 
}
 
 
 
/* USER CODE BEGIN 4 */
 
//Receive all msg's through interrupt...
 
void HAL_CAN_RxCpltCallback(CAN_HandleTypeDef* hcan)
 
{
 
 
 
 if (HAL_CAN_Receive_IT(hcan, CAN_FIFO0) != HAL_OK)      //it troughs error or hang this function itself once after 2 or 3 reception completed..
 
 {
 
  status=0;
 
  Error_Handler();
 
 } 
 
}
 
/* USER CODE END 4 */
 
 
 
/**
 
 * @brief This function is executed in case of error occurrence.
 
 * @param file: The file name as string.
 
 * @param line: The line in file as a number.
 
 * @retval None
 
 */
 
void _Error_Handler(char *file, int line)
 
{
 
 /* USER CODE BEGIN Error_Handler_Debug */
 
 /* User can add his own implementation to report the HAL error return state */
 
  
 
 /* USER CODE END Error_Handler_Debug */
 
}
 
 
 
#ifdef USE_FULL_ASSERT
 
/**
 
 * @brief Reports the name of the source file and the source line number
 
 *     where the assert_param error has occurred.
 
 * @param file: pointer to the source file name
 
 * @param line: assert_param error line source number
 
 * @retval None
 
 */
 
void assert_failed(uint8_t* file, uint32_t line)
 
{ 
 
 /* USER CODE BEGIN 6 */
 
 /* User can add his own implementation to report the file name and line number,
 
   tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
 
 /* USER CODE END 6 */
 
}
 
#endif /* USE_FULL_ASSERT */
 
 
 
/**
 
 * @}
 
 */
 
 
 
/**
 
 * @}
 
 */
 
 
 
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

[Javier1]

Youre trying to implement the received callback function HAL_CAN_Receive_IT in a very weird way, thats why your code is not working.

I could explain it to you but this guy knows much better

https://www.youtube.com/watch?v=ar3I38lCLT4

Try to follow and replicate the process shown in the video