在 STM32F446 中正确使用 CAN1 和 CAN2？
Using both CAN1 & CAN2 both in STM32F446 properly?
我想在我的应用程序中同时使用 CAN1 和 CAN2，速度分别为 500kbps 和 125kbps。我已经根据我的要求使用 HAL 对它们进行了初始化。 Tx 在轮询中实现，Rx 在中断中实现。 CAN1 Tx 和 Rx 工作完美。来到 CAN2 Tx 正在工作而 Rx 不工作。 中断本身没有为 CAN2 Rx 启动（HAL_CAN_RxFifo0MsgPendingCallback 没有被调用）。我在数据表中读到 SRAM 共享过程发生在 2 个 CAN 之间。我无法理解。这是个问题吗？
我也附上了代码。请检查并提供帮助！
小概览 - 所有 MCU 时钟 运行 在 - 16 MHz 使用内部 HSI，CAN 配置中没有过滤器
@@@@@@@@@@@@@@@@ MAIN FILE @@@@@@@@@@@@@@@@@@@@
/* Private variables ---------------------------------------------------------*/
CAN_HandleTypeDef hcan1;
CAN_HandleTypeDef hcan2;
/* USER CODE BEGIN PV */
CAN_TxHeaderTypeDef txheader;
uint8_t txdata[8];
CAN_RxHeaderTypeDef RxHeader;
uint8_t RxData[8];
CAN_TxHeaderTypeDef txheader1;
uint8_t txdata1[8];
CAN_RxHeaderTypeDef RxHeader1;
uint8_t RxData1[8];
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_CAN1_Init(void);
static void MX_CAN2_Init(void);
int main(void)
{
/* USER CODE BEGIN 1 */
uint8_t fill = 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();
MX_CAN2_Init();
/* USER CODE BEGIN 2 */
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
txheader.DLC = 8;
txheader.ExtId = 0x11111111;
txheader.IDE = CAN_ID_EXT;
txheader.RTR = CAN_RTR_DATA;
for(uint8_t i = 0; i<8;i++)
{
txdata[i] = i;
}
// txdata[0] = fill;
HAL_Delay(250);
HAL_CAN_AddTxMessage(&hcan1,&txheader,txdata, (uint32_t *)CAN_TX_MAILBOX0);
HAL_Delay(250);
HAL_CAN_AddTxMessage(&hcan2,&txheader,txdata, (uint32_t *)CAN_TX_MAILBOX0);
}
/* USER CODE END 3 */
}
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_SCALE3);
/** 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_NONE;
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_HSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief CAN1 Initialization Function
* @param None
* @retval None
*/
static void MX_CAN1_Init(void)
{
/* USER CODE BEGIN CAN1_Init 0 */
CAN_FilterTypeDef sFilterConfig;
/* 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_1TQ;
hcan1.Init.TimeSeg1 = CAN_BS1_13TQ;
hcan1.Init.TimeSeg2 = CAN_BS2_2TQ;
hcan1.Init.TimeTriggeredMode = DISABLE;
hcan1.Init.AutoBusOff = DISABLE;
hcan1.Init.AutoWakeUp = DISABLE;
hcan1.Init.AutoRetransmission = DISABLE;
hcan1.Init.ReceiveFifoLocked = DISABLE;
hcan1.Init.TransmitFifoPriority = DISABLE;
if (HAL_CAN_Init(&hcan1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN CAN1_Init 2 */
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();
}
HAL_CAN_Start(&hcan1);
/*##-4- Activate CAN RX notification #######################################*/
if (HAL_CAN_ActivateNotification(&hcan1, CAN_IT_RX_FIFO0_MSG_PENDING) != HAL_OK)
{
/* Notification Error */
Error_Handler();
}
/* USER CODE END CAN1_Init 2 */
}
/**
* @brief CAN1 Initialization Function
* @param None
* @retval None
*/
static void MX_CAN2_Init(void)
{
/* USER CODE BEGIN CAN1_Init 0 */
CAN_FilterTypeDef sFilterConfig;
/* USER CODE END CAN1_Init 0 */
/* USER CODE BEGIN CAN1_Init 1 */
/* USER CODE END CAN1_Init 1 */
hcan2.Instance = CAN2;
hcan2.Init.Prescaler = 8;
hcan2.Init.Mode = CAN_MODE_NORMAL;
hcan2.Init.SyncJumpWidth = CAN_SJW_1TQ;
hcan2.Init.TimeSeg1 = CAN_BS1_13TQ;
hcan2.Init.TimeSeg2 = CAN_BS2_2TQ;
hcan2.Init.TimeTriggeredMode = DISABLE;
hcan2.Init.AutoBusOff = DISABLE;
hcan2.Init.AutoWakeUp = DISABLE;
hcan2.Init.AutoRetransmission = DISABLE;
hcan2.Init.ReceiveFifoLocked = DISABLE;
hcan2.Init.TransmitFifoPriority = DISABLE;
if (HAL_CAN_Init(&hcan2) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN CAN1_Init 2 */
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(&hcan2, &sFilterConfig) != HAL_OK)
{
/* Filter configuration Error */
Error_Handler();
}
HAL_CAN_Start(&hcan2);
/*##-4- Activate CAN RX notification #######################################*/
if (HAL_CAN_ActivateNotification(&hcan2, CAN_IT_RX_FIFO0_MSG_PENDING) != HAL_OK)
{
/* Notification Error */
Error_Handler();
}
/* USER CODE END CAN1_Init 2 */
}
/**
* @brief GPIO Initialization Function
* @param None
* @retval None
*/
static void MX_GPIO_Init(void)
{
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOA_CLK_ENABLE();
}
/* USER CODE BEGIN 4 */
/**
* @brief Rx Fifo 0 message pending callback
* @param hcan: pointer to a CAN_HandleTypeDef structure that contains
* the configuration information for the specified CAN.
* @retval None
*/
uint8_t cflag;
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))
{
}
/* Display LEDx */
if ((RxHeader.ExtId == 0x11111111) && (RxHeader.IDE == CAN_ID_EXT) && (RxHeader.DLC == 8))
{
cflag = 1;
}
else
cflag = 0;
}
/* USER CODE END 4 */
@@@@@@@@@@@@@@@@@@@@@ MSP FILE @@@@@@@@@@@@@@@@@@@@@@
/**
* Initializes the Global MSP.
*/
void HAL_MspInit(void)
{
/* USER CODE BEGIN MspInit 0 */
/* USER CODE END MspInit 0 */
__HAL_RCC_SYSCFG_CLK_ENABLE();
__HAL_RCC_PWR_CLK_ENABLE();
/* System interrupt init*/
/* USER CODE BEGIN MspInit 1 */
/* USER CODE END MspInit 1 */
}
static uint32_t HAL_RCC_CAN1_CLK_ENABLED=0;
/**
* @brief CAN MSP Initialization
* This function configures the hardware resources used in this example
* @param hcan: CAN handle pointer
* @retval None
*/
void HAL_CAN_MspInit(CAN_HandleTypeDef* hcan)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if(hcan->Instance==CAN1)
{
/* USER CODE BEGIN CAN1_MspInit 0 */
/* USER CODE END CAN1_MspInit 0 */
/* Peripheral clock enable */
HAL_RCC_CAN1_CLK_ENABLED++;
if(HAL_RCC_CAN1_CLK_ENABLED==1){
__HAL_RCC_CAN1_CLK_ENABLE();
}
__HAL_RCC_GPIOA_CLK_ENABLE();
/**CAN1 GPIO Configuration
PA11 ------> CAN1_RX
PA12 ------> CAN1_TX
*/
GPIO_InitStruct.Pin = GPIO_PIN_11|GPIO_PIN_12;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF9_CAN1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* USER CODE BEGIN CAN1_MspInit 1 */
HAL_NVIC_SetPriority(CAN1_RX0_IRQn, 1, 0);
HAL_NVIC_EnableIRQ(CAN1_RX0_IRQn);
/* USER CODE END CAN1_MspInit 1 */
}
else if(hcan->Instance==CAN2)
{
/* USER CODE BEGIN CAN2_MspInit 0 */
/* USER CODE END CAN2_MspInit 0 */
/* Peripheral clock enable */
__HAL_RCC_CAN2_CLK_ENABLE();
HAL_RCC_CAN1_CLK_ENABLED++;
if(HAL_RCC_CAN1_CLK_ENABLED==1){
__HAL_RCC_CAN1_CLK_ENABLE();
}
__HAL_RCC_GPIOB_CLK_ENABLE();
/**CAN2 GPIO Configuration
PB12 ------> CAN2_RX
PB13 ------> CAN2_TX
*/
GPIO_InitStruct.Pin = GPIO_PIN_12|GPIO_PIN_13;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF9_CAN2;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* CAN2 interrupt Init */
HAL_NVIC_SetPriority(CAN2_RX0_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(CAN2_RX0_IRQn);
/* USER CODE BEGIN CAN2_MspInit 1 */
/* USER CODE END CAN2_MspInit 1 */
}
}
/**
* @brief CAN MSP De-Initialization
* This function freeze the hardware resources used in this example
* @param hcan: CAN handle pointer
* @retval None
*/
void HAL_CAN_MspDeInit(CAN_HandleTypeDef* hcan)
{
if(hcan->Instance==CAN1)
{
/* USER CODE BEGIN CAN1_MspDeInit 0 */
/* USER CODE END CAN1_MspDeInit 0 */
/* Peripheral clock disable */
HAL_RCC_CAN1_CLK_ENABLED--;
if(HAL_RCC_CAN1_CLK_ENABLED==0){
__HAL_RCC_CAN1_CLK_DISABLE();
}
/**CAN1 GPIO Configuration
PA11 ------> CAN1_RX
PA12 ------> CAN1_TX
*/
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_11|GPIO_PIN_12);
/* USER CODE BEGIN CAN1_MspDeInit 1 */
/* USER CODE END CAN1_MspDeInit 1 */
}
else if(hcan->Instance==CAN2)
{
/* USER CODE BEGIN CAN2_MspDeInit 0 */
/* USER CODE END CAN2_MspDeInit 0 */
/* Peripheral clock disable */
__HAL_RCC_CAN2_CLK_DISABLE();
HAL_RCC_CAN1_CLK_ENABLED--;
if(HAL_RCC_CAN1_CLK_ENABLED==0){
__HAL_RCC_CAN1_CLK_DISABLE();
}
/**CAN2 GPIO Configuration
PB12 ------> CAN2_RX
PB13 ------> CAN2_TX
*/
HAL_GPIO_DeInit(GPIOB, GPIO_PIN_12|GPIO_PIN_13);
/* CAN2 interrupt DeInit */
HAL_NVIC_DisableIRQ(CAN2_RX0_IRQn);
/* USER CODE BEGIN CAN2_MspDeInit 1 */
/* USER CODE END CAN2_MspDeInit 1 */
}
}
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
@@@@@@@@@@@@@@@@@@@@@@@@@ IT FILE @@@@@@@@@@@@@@@@@@@@@@@@@@@@@
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "stm32f4xx_it.h"
/* External variables --------------------------------------------------------*/
extern CAN_HandleTypeDef hcan2;
/**
* @brief This function handles System tick timer.
*/
void SysTick_Handler(void)
{
/* USER CODE BEGIN SysTick_IRQn 0 */
/* USER CODE END SysTick_IRQn 0 */
HAL_IncTick();
/* USER CODE BEGIN SysTick_IRQn 1 */
/* USER CODE END SysTick_IRQn 1 */
}
/******************************************************************************/
/* STM32F4xx Peripheral Interrupt Handlers */
/* Add here the Interrupt Handlers for the used peripherals. */
/* For the available peripheral interrupt handler names, */
/* please refer to the startup file (startup_stm32f4xx.s). */
/******************************************************************************/
/**
* @brief This function handles CAN2 RX0 interrupt.
*/
void CAN2_RX0_IRQHandler(void)
{
/* USER CODE BEGIN CAN2_RX0_IRQn 0 */
/* USER CODE END CAN2_RX0_IRQn 0 */
HAL_CAN_IRQHandler(&hcan2);
/* USER CODE BEGIN CAN2_RX0_IRQn 1 */
/* USER CODE END CAN2_RX0_IRQn 1 */
}
/* USER CODE BEGIN 1 */
/**
* @brief This function handles CAN1 RX0 interrupt request.
* @param None
* @retval None
*/
extern CAN_HandleTypeDef hcan1;
void CAN1_RX0_IRQHandler(void)
{
HAL_CAN_IRQHandler(&hcan1);
}
/* USER CODE END 1 */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
我解决了我的问题。得到ST社区的帮助。请参考下面的link。
https://community.st.com/s/feed/0D53W00000RQCwgSAH?t=1608012202888
问题出在 CAN1 和 CAN2 的过滤器配置上。 CAN1 和 CAN2 之间有 28 个滤波器组 (0-27)。上半场 (0-13) 用于 CAN1，其余部分用于 CAN2。所以只需对上面发布的代码进行一些更改 -
CAN 1:
sFilterConfig.FilterBank = 0;
:
sFilterConfig.SlaveStartFilterBank = 14;
CAN2:
sFilterConfig.FilterBank = 14; // previously 0
:
sFilterConfig.SlaveStartFilterBank = 14; // previously 27
感谢 Lundin 建议同步点。使用本网站进行各种芯片的CAN位时间计算 -
我想在我的应用程序中同时使用 CAN1 和 CAN2，速度分别为 500kbps 和 125kbps。我已经根据我的要求使用 HAL 对它们进行了初始化。 Tx 在轮询中实现，Rx 在中断中实现。 CAN1 Tx 和 Rx 工作完美。来到 CAN2 Tx 正在工作而 Rx 不工作。 中断本身没有为 CAN2 Rx 启动（HAL_CAN_RxFifo0MsgPendingCallback 没有被调用）。我在数据表中读到 SRAM 共享过程发生在 2 个 CAN 之间。我无法理解。这是个问题吗？
我也附上了代码。请检查并提供帮助！
小概览 - 所有 MCU 时钟 运行 在 - 16 MHz 使用内部 HSI，CAN 配置中没有过滤器
@@@@@@@@@@@@@@@@ MAIN FILE @@@@@@@@@@@@@@@@@@@@
/* Private variables ---------------------------------------------------------*/
CAN_HandleTypeDef hcan1;
CAN_HandleTypeDef hcan2;
/* USER CODE BEGIN PV */
CAN_TxHeaderTypeDef txheader;
uint8_t txdata[8];
CAN_RxHeaderTypeDef RxHeader;
uint8_t RxData[8];
CAN_TxHeaderTypeDef txheader1;
uint8_t txdata1[8];
CAN_RxHeaderTypeDef RxHeader1;
uint8_t RxData1[8];
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_CAN1_Init(void);
static void MX_CAN2_Init(void);
int main(void)
{
/* USER CODE BEGIN 1 */
uint8_t fill = 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();
MX_CAN2_Init();
/* USER CODE BEGIN 2 */
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
txheader.DLC = 8;
txheader.ExtId = 0x11111111;
txheader.IDE = CAN_ID_EXT;
txheader.RTR = CAN_RTR_DATA;
for(uint8_t i = 0; i<8;i++)
{
txdata[i] = i;
}
// txdata[0] = fill;
HAL_Delay(250);
HAL_CAN_AddTxMessage(&hcan1,&txheader,txdata, (uint32_t *)CAN_TX_MAILBOX0);
HAL_Delay(250);
HAL_CAN_AddTxMessage(&hcan2,&txheader,txdata, (uint32_t *)CAN_TX_MAILBOX0);
}
/* USER CODE END 3 */
}
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_SCALE3);
/** 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_NONE;
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_HSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief CAN1 Initialization Function
* @param None
* @retval None
*/
static void MX_CAN1_Init(void)
{
/* USER CODE BEGIN CAN1_Init 0 */
CAN_FilterTypeDef sFilterConfig;
/* 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_1TQ;
hcan1.Init.TimeSeg1 = CAN_BS1_13TQ;
hcan1.Init.TimeSeg2 = CAN_BS2_2TQ;
hcan1.Init.TimeTriggeredMode = DISABLE;
hcan1.Init.AutoBusOff = DISABLE;
hcan1.Init.AutoWakeUp = DISABLE;
hcan1.Init.AutoRetransmission = DISABLE;
hcan1.Init.ReceiveFifoLocked = DISABLE;
hcan1.Init.TransmitFifoPriority = DISABLE;
if (HAL_CAN_Init(&hcan1) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN CAN1_Init 2 */
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();
}
HAL_CAN_Start(&hcan1);
/*##-4- Activate CAN RX notification #######################################*/
if (HAL_CAN_ActivateNotification(&hcan1, CAN_IT_RX_FIFO0_MSG_PENDING) != HAL_OK)
{
/* Notification Error */
Error_Handler();
}
/* USER CODE END CAN1_Init 2 */
}
/**
* @brief CAN1 Initialization Function
* @param None
* @retval None
*/
static void MX_CAN2_Init(void)
{
/* USER CODE BEGIN CAN1_Init 0 */
CAN_FilterTypeDef sFilterConfig;
/* USER CODE END CAN1_Init 0 */
/* USER CODE BEGIN CAN1_Init 1 */
/* USER CODE END CAN1_Init 1 */
hcan2.Instance = CAN2;
hcan2.Init.Prescaler = 8;
hcan2.Init.Mode = CAN_MODE_NORMAL;
hcan2.Init.SyncJumpWidth = CAN_SJW_1TQ;
hcan2.Init.TimeSeg1 = CAN_BS1_13TQ;
hcan2.Init.TimeSeg2 = CAN_BS2_2TQ;
hcan2.Init.TimeTriggeredMode = DISABLE;
hcan2.Init.AutoBusOff = DISABLE;
hcan2.Init.AutoWakeUp = DISABLE;
hcan2.Init.AutoRetransmission = DISABLE;
hcan2.Init.ReceiveFifoLocked = DISABLE;
hcan2.Init.TransmitFifoPriority = DISABLE;
if (HAL_CAN_Init(&hcan2) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN CAN1_Init 2 */
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(&hcan2, &sFilterConfig) != HAL_OK)
{
/* Filter configuration Error */
Error_Handler();
}
HAL_CAN_Start(&hcan2);
/*##-4- Activate CAN RX notification #######################################*/
if (HAL_CAN_ActivateNotification(&hcan2, CAN_IT_RX_FIFO0_MSG_PENDING) != HAL_OK)
{
/* Notification Error */
Error_Handler();
}
/* USER CODE END CAN1_Init 2 */
}
/**
* @brief GPIO Initialization Function
* @param None
* @retval None
*/
static void MX_GPIO_Init(void)
{
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOA_CLK_ENABLE();
}
/* USER CODE BEGIN 4 */
/**
* @brief Rx Fifo 0 message pending callback
* @param hcan: pointer to a CAN_HandleTypeDef structure that contains
* the configuration information for the specified CAN.
* @retval None
*/
uint8_t cflag;
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))
{
}
/* Display LEDx */
if ((RxHeader.ExtId == 0x11111111) && (RxHeader.IDE == CAN_ID_EXT) && (RxHeader.DLC == 8))
{
cflag = 1;
}
else
cflag = 0;
}
/* USER CODE END 4 */
@@@@@@@@@@@@@@@@@@@@@ MSP FILE @@@@@@@@@@@@@@@@@@@@@@
/**
* Initializes the Global MSP.
*/
void HAL_MspInit(void)
{
/* USER CODE BEGIN MspInit 0 */
/* USER CODE END MspInit 0 */
__HAL_RCC_SYSCFG_CLK_ENABLE();
__HAL_RCC_PWR_CLK_ENABLE();
/* System interrupt init*/
/* USER CODE BEGIN MspInit 1 */
/* USER CODE END MspInit 1 */
}
static uint32_t HAL_RCC_CAN1_CLK_ENABLED=0;
/**
* @brief CAN MSP Initialization
* This function configures the hardware resources used in this example
* @param hcan: CAN handle pointer
* @retval None
*/
void HAL_CAN_MspInit(CAN_HandleTypeDef* hcan)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if(hcan->Instance==CAN1)
{
/* USER CODE BEGIN CAN1_MspInit 0 */
/* USER CODE END CAN1_MspInit 0 */
/* Peripheral clock enable */
HAL_RCC_CAN1_CLK_ENABLED++;
if(HAL_RCC_CAN1_CLK_ENABLED==1){
__HAL_RCC_CAN1_CLK_ENABLE();
}
__HAL_RCC_GPIOA_CLK_ENABLE();
/**CAN1 GPIO Configuration
PA11 ------> CAN1_RX
PA12 ------> CAN1_TX
*/
GPIO_InitStruct.Pin = GPIO_PIN_11|GPIO_PIN_12;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF9_CAN1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* USER CODE BEGIN CAN1_MspInit 1 */
HAL_NVIC_SetPriority(CAN1_RX0_IRQn, 1, 0);
HAL_NVIC_EnableIRQ(CAN1_RX0_IRQn);
/* USER CODE END CAN1_MspInit 1 */
}
else if(hcan->Instance==CAN2)
{
/* USER CODE BEGIN CAN2_MspInit 0 */
/* USER CODE END CAN2_MspInit 0 */
/* Peripheral clock enable */
__HAL_RCC_CAN2_CLK_ENABLE();
HAL_RCC_CAN1_CLK_ENABLED++;
if(HAL_RCC_CAN1_CLK_ENABLED==1){
__HAL_RCC_CAN1_CLK_ENABLE();
}
__HAL_RCC_GPIOB_CLK_ENABLE();
/**CAN2 GPIO Configuration
PB12 ------> CAN2_RX
PB13 ------> CAN2_TX
*/
GPIO_InitStruct.Pin = GPIO_PIN_12|GPIO_PIN_13;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF9_CAN2;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* CAN2 interrupt Init */
HAL_NVIC_SetPriority(CAN2_RX0_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(CAN2_RX0_IRQn);
/* USER CODE BEGIN CAN2_MspInit 1 */
/* USER CODE END CAN2_MspInit 1 */
}
}
/**
* @brief CAN MSP De-Initialization
* This function freeze the hardware resources used in this example
* @param hcan: CAN handle pointer
* @retval None
*/
void HAL_CAN_MspDeInit(CAN_HandleTypeDef* hcan)
{
if(hcan->Instance==CAN1)
{
/* USER CODE BEGIN CAN1_MspDeInit 0 */
/* USER CODE END CAN1_MspDeInit 0 */
/* Peripheral clock disable */
HAL_RCC_CAN1_CLK_ENABLED--;
if(HAL_RCC_CAN1_CLK_ENABLED==0){
__HAL_RCC_CAN1_CLK_DISABLE();
}
/**CAN1 GPIO Configuration
PA11 ------> CAN1_RX
PA12 ------> CAN1_TX
*/
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_11|GPIO_PIN_12);
/* USER CODE BEGIN CAN1_MspDeInit 1 */
/* USER CODE END CAN1_MspDeInit 1 */
}
else if(hcan->Instance==CAN2)
{
/* USER CODE BEGIN CAN2_MspDeInit 0 */
/* USER CODE END CAN2_MspDeInit 0 */
/* Peripheral clock disable */
__HAL_RCC_CAN2_CLK_DISABLE();
HAL_RCC_CAN1_CLK_ENABLED--;
if(HAL_RCC_CAN1_CLK_ENABLED==0){
__HAL_RCC_CAN1_CLK_DISABLE();
}
/**CAN2 GPIO Configuration
PB12 ------> CAN2_RX
PB13 ------> CAN2_TX
*/
HAL_GPIO_DeInit(GPIOB, GPIO_PIN_12|GPIO_PIN_13);
/* CAN2 interrupt DeInit */
HAL_NVIC_DisableIRQ(CAN2_RX0_IRQn);
/* USER CODE BEGIN CAN2_MspDeInit 1 */
/* USER CODE END CAN2_MspDeInit 1 */
}
}
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
@@@@@@@@@@@@@@@@@@@@@@@@@ IT FILE @@@@@@@@@@@@@@@@@@@@@@@@@@@@@
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "stm32f4xx_it.h"
/* External variables --------------------------------------------------------*/
extern CAN_HandleTypeDef hcan2;
/**
* @brief This function handles System tick timer.
*/
void SysTick_Handler(void)
{
/* USER CODE BEGIN SysTick_IRQn 0 */
/* USER CODE END SysTick_IRQn 0 */
HAL_IncTick();
/* USER CODE BEGIN SysTick_IRQn 1 */
/* USER CODE END SysTick_IRQn 1 */
}
/******************************************************************************/
/* STM32F4xx Peripheral Interrupt Handlers */
/* Add here the Interrupt Handlers for the used peripherals. */
/* For the available peripheral interrupt handler names, */
/* please refer to the startup file (startup_stm32f4xx.s). */
/******************************************************************************/
/**
* @brief This function handles CAN2 RX0 interrupt.
*/
void CAN2_RX0_IRQHandler(void)
{
/* USER CODE BEGIN CAN2_RX0_IRQn 0 */
/* USER CODE END CAN2_RX0_IRQn 0 */
HAL_CAN_IRQHandler(&hcan2);
/* USER CODE BEGIN CAN2_RX0_IRQn 1 */
/* USER CODE END CAN2_RX0_IRQn 1 */
}
/* USER CODE BEGIN 1 */
/**
* @brief This function handles CAN1 RX0 interrupt request.
* @param None
* @retval None
*/
extern CAN_HandleTypeDef hcan1;
void CAN1_RX0_IRQHandler(void)
{
HAL_CAN_IRQHandler(&hcan1);
}
/* USER CODE END 1 */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
我解决了我的问题。得到ST社区的帮助。请参考下面的link。
https://community.st.com/s/feed/0D53W00000RQCwgSAH?t=1608012202888
问题出在 CAN1 和 CAN2 的过滤器配置上。 CAN1 和 CAN2 之间有 28 个滤波器组 (0-27)。上半场 (0-13) 用于 CAN1，其余部分用于 CAN2。所以只需对上面发布的代码进行一些更改 -
CAN 1:
sFilterConfig.FilterBank = 0;
:
sFilterConfig.SlaveStartFilterBank = 14;
CAN2:
sFilterConfig.FilterBank = 14; // previously 0
:
sFilterConfig.SlaveStartFilterBank = 14; // previously 27
感谢 Lundin 建议同步点。使用本网站进行各种芯片的CAN位时间计算 -