2019-05-17 05:59 AM
Hello,
I am using the STM32F7 in my project, which uses the CAN1. I create the project from cubemx and connect it to a STM32F4 evaluation board to test. I can see the Can signal via the oscillations cope after the transceiver, but no interrupt can be triggered. The main code is below, and anyone can help me?
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_CAN1_Init();
while (1)
{
}
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
HAL_PWR_EnableBkUpAccess();
/** Configure the main internal regulator output voltage
*/
__HAL_RCC_PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE3);
/** Initializes the CPU, AHB and APB busses clocks
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 24;
RCC_OscInitStruct.PLL.PLLN = 96;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 9;
RCC_OscInitStruct.PLL.PLLR = 7;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Activate the Over-Drive mode
*/
if (HAL_PWREx_EnableOverDrive() != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB busses 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_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_7) != HAL_OK)
{
Error_Handler();
}
}
static void MX_CAN1_Init(void)
{
CAN_FilterTypeDef sFilterConfig;
/*##-1- Configure the CAN peripheral #######################################*/
hcan1.Instance = CAN1;
hcan1.Init.TimeTriggeredMode = DISABLE;
hcan1.Init.AutoBusOff = ENABLE;
hcan1.Init.AutoWakeUp = DISABLE;
hcan1.Init.AutoRetransmission = ENABLE;
hcan1.Init.ReceiveFifoLocked = DISABLE;
hcan1.Init.TransmitFifoPriority = DISABLE;
hcan1.Init.Mode = CAN_MODE_NORMAL;
hcan1.Init.SyncJumpWidth = CAN_SJW_1TQ;
hcan1.Init.TimeSeg1 = CAN_BS1_6TQ;
hcan1.Init.TimeSeg2 = CAN_BS2_2TQ;
hcan1.Init.Prescaler = 6;
if (HAL_CAN_Init(&hcan1) != HAL_OK)
{
Error_Handler();
}
/*##-2- Configure the CAN Filter ###########################################*/
sFilterConfig.FilterBank = 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 = CAN_RX_FIFO0;
sFilterConfig.FilterActivation = ENABLE;
sFilterConfig.SlaveStartFilterBank = 14;
if (HAL_CAN_ConfigFilter(&hcan1, &sFilterConfig) != HAL_OK)
{
/* Filter configuration Error */
Error_Handler();
}
/*##-3- Start the CAN peripheral ###########################################*/
if (HAL_CAN_Start(&hcan1) != HAL_OK)
{
/* Start Error */
Error_Handler();
}
/*##-4- Activate CAN RX notification #######################################*/
if (HAL_CAN_ActivateNotification(&hcan1, CAN_IT_RX_FIFO0_MSG_PENDING) != HAL_OK)
{
/* Notification Error */
Error_Handler();
}
/*##-5- Configure Transmission process #####################################*/
TxHeader.StdId = 0x321;
TxHeader.ExtId = 0x01;
TxHeader.RTR = CAN_RTR_DATA;
TxHeader.IDE = CAN_ID_STD;
TxHeader.DLC = 2;
TxHeader.TransmitGlobalTime = DISABLE;
}
/**
* @brief GPIO Initialization Function
* @param None
* @retval None
*/
static void MX_GPIO_Init(void)
{
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOH_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
}
void HAL_CAN_RxFifo0MsgPendingCallback(CAN_HandleTypeDef *hcan)
{
/* Get RX message */
if (HAL_CAN_GetRxMessage(hcan, CAN_RX_FIFO0, &RxHeader, RxData) != HAL_OK)
{
/* Reception Error */
Error_Handler();
}
/* Display LEDx */
if ((RxHeader.StdId == 0x321) && (RxHeader.IDE == CAN_ID_STD) && (RxHeader.DLC == 2))
{
// LED_Display(RxData[0]);
ubKeyNumber = RxData[0];
}
}
void HAL_CAN_MspInit(CAN_HandleTypeDef* hcan)
{
GPIO_InitTypeDef GPIO_InitStruct;
CANx_CLK_ENABLE();
/* Enable GPIO clock ****************************************/
CANx_GPIO_CLK_ENABLE();
/*##-2- Configure peripheral GPIO ##########################################*/
/* CAN1 TX GPIO pin configuration */
GPIO_InitStruct.Pin = CANx_TX_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Alternate = CANx_TX_AF;
HAL_GPIO_Init(CANx_TX_GPIO_PORT, &GPIO_InitStruct);
/* CAN1 RX GPIO pin configuration */
GPIO_InitStruct.Pin = CANx_RX_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Alternate = CANx_RX_AF;
HAL_GPIO_Init(CANx_RX_GPIO_PORT, &GPIO_InitStruct);
/*##-3- Configure the NVIC #################################################*/
/* NVIC configuration for CAN1 Reception complete interrupt */
HAL_NVIC_SetPriority(CANx_RX_IRQn, 1, 0);
HAL_NVIC_EnableIRQ(CANx_RX_IRQn);
}
2019-05-17 11:19 PM
I think the best way to begin debugging is to let the system run for a second or two, stop it and check the CAN_IER and CAN_ESR registers, especially the lec-field of the CAN_ESR.
2019-05-19 09:45 PM
BTW, TxHeader.StdId and TxHeader.ExtId are mutually exclusive. TxHeader.IDE defines which one is used.
They are not standard part and extension part.