I have been trying to resolve the issue for receiving the CAN interrupt but not able to find the root cause.
Hardware is a custom board micro is STM32F405RGT6 i am using CAN1 for CAN communication with 500 Kbps.
Able to transmit message CAN message using polling method. I am transmitting CAN messages from Peak CAN tool but not able to hit the receive interrupt.
Few observations after reset, the DBF bit is set, will it be a problem?
1.
2.I have the Tx interrupt enabled
But the TMEIE bit is not set after calling the MX_NVIC_Init(void)
Coming to the actual problem the FMPIE0 bit is set and i am sending the messages at 1sec interval
FMP0 is always 0. What is the problem?
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE BEGIN 1 */
TxHeader.IDE = CAN_ID_STD;
TxHeader.StdId = 0x7df;
TxHeader.RTR = CAN_RTR_DATA;
TxHeader.DLC = 8;
TxData[0] = 8;
TxData[1] = 2;
TxData[2] = 1;
TxData[3] = 0xd;
TxData[4] = 0;
TxData[5] = 0;
TxData[6] = 0;
TxData[7] = 0;
TxData[0] = 8;
TxData1[0] = 8;
TxData1[1] = 2;
TxData1[2] = 1;
TxData1[3] = 0x11;
TxData1[4] = 0;
TxData1[5] = 0;
TxData1[6] = 0;
TxData1[7] = 0;
/* 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_CAN1_Init();
/* Initialize interrupts */
MX_NVIC_Init();
/* USER CODE BEGIN 2 */
CanFilter();
/*To activate receive notification */
if (HAL_CAN_ActivateNotification(&hcan1, CAN_IT_RX_FIFO0_MSG_PENDING) != HAL_OK)
{
Error_Handler();
}
if (HAL_CAN_Start(&hcan1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
HAL_GPIO_WritePin(GPIOC,GPIO_PIN_0,GPIO_PIN_RESET);
HAL_GPIO_WritePin(GPIOC,GPIO_PIN_3,GPIO_PIN_RESET);
if(HAL_CAN_AddTxMessage(&hcan1, &TxHeader, TxData, &TxMailbox) != HAL_OK)
{
Error_Handler ();
}
HAL_Delay(1000);
while(HAL_CAN_IsTxMessagePending(&hcan1, TxMailbox));
if (HAL_CAN_AddTxMessage(&hcan1, &TxHeader, TxData1, &TxMailbox) != HAL_OK)
{
Error_Handler ();
}
/* 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 = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Configure the main internal regulator output voltage
*/
__HAL_RCC_PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
/** Initializes the RCC Oscillators according to the specified parameters
* in the RCC_OscInitTypeDef structure.
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLM = 8;
RCC_OscInitStruct.PLL.PLLN = 64;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 4;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief NVIC Configuration.
* @retval None
*/
static void MX_NVIC_Init(void)
{
/* FLASH_IRQn interrupt configuration */
HAL_NVIC_SetPriority(FLASH_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(FLASH_IRQn);
/* RCC_IRQn interrupt configuration */
HAL_NVIC_SetPriority(RCC_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(RCC_IRQn);
/* CAN1_TX_IRQn interrupt configuration */
HAL_NVIC_SetPriority(CAN1_TX_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(CAN1_TX_IRQn);
/* CAN1_RX0_IRQn interrupt configuration */
HAL_NVIC_SetPriority(CAN1_RX0_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(CAN1_RX0_IRQn);
/* CAN1_RX1_IRQn interrupt configuration */
HAL_NVIC_SetPriority(CAN1_RX1_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(CAN1_RX1_IRQn);
}
/**
* @brief CAN1 Initialization Function
* @PAram None
* @retval None
*/
static void MX_CAN1_Init(void)
{
/* USER CODE BEGIN CAN1_Init 0 */
/* USER CODE END CAN1_Init 0 */
/* USER CODE BEGIN CAN1_Init 1 */
/* USER CODE END CAN1_Init 1 */
hcan1.Instance = CAN1;
hcan1.Init.Prescaler = 2;
hcan1.Init.Mode = CAN_MODE_NORMAL;
hcan1.Init.SyncJumpWidth = CAN_SJW_3TQ;
hcan1.Init.TimeSeg1 = CAN_BS1_9TQ;
hcan1.Init.TimeSeg2 = CAN_BS2_6TQ;
hcan1.Init.TimeTriggeredMode = DISABLE;
hcan1.Init.AutoBusOff = DISABLE;
hcan1.Init.AutoWakeUp = DISABLE;
hcan1.Init.AutoRetransmission = ENABLE;
hcan1.Init.ReceiveFifoLocked = DISABLE;
hcan1.Init.TransmitFifoPriority = DISABLE;
if (HAL_CAN_Init(&hcan1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN CAN1_Init 2 */
/* USER CODE END CAN1_Init 2 */
}
/**
* @brief GPIO Initialization Function
* @PAram None
* @retval None
*/
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(GPIOC, GPIO_PIN_0|GPIO_PIN_3, GPIO_PIN_RESET);
/*Configure GPIO pin : PC0 */
GPIO_InitStruct.Pin = GPIO_PIN_0;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_PULLDOWN;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
/*Configure GPIO pin : PC3 */
GPIO_InitStruct.Pin = GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
/* USER CODE BEGIN MX_GPIO_Init_2 */
/* USER CODE END MX_GPIO_Init_2 */
}
/* USER CODE BEGIN 4 */
void CanFilter(void)
{
CAN_FilterTypeDef canfilterconfig;
canfilterconfig.FilterActivation = CAN_FILTER_ENABLE;
canfilterconfig.FilterBank = 18; // which filter bank to use from the assigned ones
canfilterconfig.FilterFIFOAssignment = CAN_FILTER_FIFO0;
canfilterconfig.FilterIdHigh = 0x446<<5;
canfilterconfig.FilterIdLow = 0;
canfilterconfig.FilterMaskIdHigh = 0x446<<5;
canfilterconfig.FilterMaskIdLow = 0x0000;
canfilterconfig.FilterMode = CAN_FILTERMODE_IDMASK;
canfilterconfig.FilterScale = CAN_FILTERSCALE_32BIT;
canfilterconfig.SlaveStartFilterBank = 20; // how many filters to assign to the CAN1 (master can)
if (HAL_CAN_ConfigFilter(&hcan1, &canfilterconfig) != HAL_OK)
{
Error_Handler();
}
}
void HAL_CAN_RxFifo0MsgPendingCallback(CAN_HandleTypeDef *hcan)
{
if(HAL_CAN_GetRxMessage(hcan, CAN_RX_FIFO0, &RxHeader, RxData) != HAL_OK)
{
Error_Handler();
}
if ((RxHeader.StdId == 0x103))
{
// datacheck = 1;
}
}
/* USER CODE END 4 */
1 ACCEPTED SOLUTION
Accepted Solutions
I have not tried the loop back mode, i will try that as well.
I am not sure if the image is clear i will share the scanned image after some time.
