STM32Cube的CAN滤波如何设置

只看该作者 · 2017-3-8 20:25

STM32Cube的CAN滤波如何设置，需要只让两个需要的ID进去中断，其他的全部过滤。请问如何设置？
/*##-2- Configure the CAN1 Filter ###########################################*/
      sFilterConfig.FilterNumber = 0;
      sFilterConfig.FilterMode = CAN_FILTERMODE_IDMASK;
      sFilterConfig.FilterScale = CAN_FILTERSCALE_32BIT;
      sFilterConfig.FilterIdHigh = AllowID_F507<<5;
      sFilterConfig.FilterIdLow = 0|CAN_ID_STD;;
      sFilterConfig.FilterMaskIdHigh = 0xFFFF;
      sFilterConfig.FilterMaskIdLow = 0xFFFF;
      sFilterConfig.FilterFIFOAssignment = CAN_FIFO0;
      sFilterConfig.FilterActivation = ENABLE;
      sFilterConfig.BankNumber = 0;
      HAL_CAN_ConfigFilter(&hcan, &sFilterConfig);

      /*##-2- Configure the CAN1 Filter ###########################################*/
      sFilterConfig.FilterNumber = 1;
      sFilterConfig.FilterMode = CAN_FILTERMODE_IDMASK;
      sFilterConfig.FilterScale = CAN_FILTERSCALE_32BIT;
      sFilterConfig.FilterIdHigh = AllowID2_F507<<5;
      sFilterConfig.FilterIdLow = 0|CAN_ID_STD;;
      sFilterConfig.FilterMaskIdHigh = 0xFFFF;
      sFilterConfig.FilterMaskIdLow = 0xFFFF;
      sFilterConfig.FilterFIFOAssignment = CAN_FIFO0;
      sFilterConfig.FilterActivation = ENABLE;
      sFilterConfig.BankNumber = 0;
      HAL_CAN_ConfigFilter(&hcan, &sFilterConfig);

      HAL_CAN_Receive_IT(&hcan,CAN_FIFO0);

芯片是用STM32F103VET的。

只看该作者 · 2017-3-8 20:56

这个是针对接收来滤波的。发送是不滤波的

只看该作者 · 2017-3-8 21:08

主要是对.FilterIdHigh/FilterMaskIdLow/FilterIdHigh/FilterIdLow这四个参数来设定的，具体的参数，来“卡”什么id才接收等等。

只看该作者 · 2017-3-8 21:21

滤波的作用可以滤掉一批（逻辑上有顺序的）id，你就两个id还用两个过滤器实在是浪费。