STM32F446 nucleo板CAN1通信配置不成功

2万 · 2021-2-9 23:11

使用CUBE MX配置CAN1接口，参考官方库资料和网友分享资料，不管怎样在连接USB CAN卡的时候，CAN卡都不能识别到配置好的波特率，请教有没有人遇到此类问题

2万 · 2021-2-9 23:13

楼主程序可以公开吗？贴程序看下吧，这么说看不出什么原因

2万 · 2021-2-9 23:15

主要代码如下：
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 = 5;
  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.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 */

      CAN_User_Init(&hcan1);

  /* USER CODE END CAN1_Init 2 */

}

void CAN_User_Init(CAN_HandleTypeDef *hcan)
{

      CAN_FilterTypeDef  sFilterConfig;
//       HAL_StatusTypeDef  HAL_Status;

      sFilterConfig.FilterBank = 0;
      sFilterConfig.FilterMode =  CAN_FILTERMODE_IDMASK;
      sFilterConfig.FilterScale = CAN_FILTERSCALE_32BIT;

      sFilterConfig.FilterIdHigh = CAN_CONFIG_INIT.CAN_Rece_ID<<5;
      sFilterConfig.FilterIdLow  = 0 | CAN_ID_STD;

//  sFilterConfig.FilterIdHigh = 0;
//       sFilterConfig.FilterIdLow  = 0;

      sFilterConfig.FilterMaskIdHigh = 0;
      sFilterConfig.FilterMaskIdLow  = 0;

      sFilterConfig.FilterFIFOAssignment = CAN_RX_FIFO0;
      sFilterConfig.FilterActivation = ENABLE;

      sFilterConfig.SlaveStartFilterBank  = 0;

  if (HAL_CAN_ConfigFilter(&hcan1, &sFilterConfig) != HAL_OK)
      {
            Error_Handler();
      }

      if (HAL_CAN_Start(&hcan1) != HAL_OK )
      {
   Error_Handler();
  }

//  if(HAL_CAN_ActivateNotification(&hcan1, CAN_IT_RX_FIFO0_MSG_PENDING | CAN_IT_TX_MAILBOX_EMPTY) != HAL_OK)
      if(HAL_CAN_ActivateNotification(&hcan1, CAN_IT_RX_FIFO0_MSG_PENDING) != HAL_OK)
      {
Error_Handler();
  }

}