cubemx配置stm32f407vet6的can通信，can发送失败

yrx020307

已于 2024-08-23 10:17:05 修改

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分类专栏： stm32f407 stm32调试文章标签： stm32

于 2024-08-23 09:58:19 首次发布

本文链接：https://blog.youkuaiyun.com/yrx020307/article/details/141457499

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cubemx 在这里插入图片描述

生成代码后。写了一个测试程序；

调用这个函数，
一直提示can发送error；

原因分析：
cubemx生成代码如下：

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 = 21;
  hcan1.Init.Mode = CAN_MODE_NORMAL;
  hcan1.Init.SyncJumpWidth = CAN_SJW_1TQ;
  hcan1.Init.TimeSeg1 = CAN_BS1_2TQ;
  hcan1.Init.TimeSeg2 = CAN_BS2_5TQ;
  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 */

  /* USER CODE END CAN1_Init 2 */

}

MX_CAN1_Init函数不完全；
想要实现发送，需要在MX_CAN1_Init添加

    HAL_CAN_ConfigFilter(&hcan1, &sFilterConfig) ;
    HAL_CAN_Start(&hcan1);
    HAL_CAN_ActivateNotification(&hcan1,CAN_IT_RX_FIFO0_MSG_PENDING);

想要接收，需要做2个操作：
1）需要在MX_CAN1_Init添加

CAN_FilterTypeDef sFilterConfig;
     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

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