我用两台单片机进行CAN通信试验，收发都成功了，但发现了一个问题，设置的过滤器id为00和01，结果另一台单片机发送ID
StdId无论改为什么这台单片机都能收到消息，怎么回事？难道双节点通信不需要用ID标识符过滤消息？
这是我的can过滤器设置：
void CAN1_Config16BitFilter(uint16_t id1, uint16_t id2)
{
    CAN_FilterInitTypeDef  CAN_FilterInitStructure;
    uint16_t mask = 0xFFFF;

        CAN_FilterInitStructure.CAN_FilterNumber = 1;               
        CAN_FilterInitStructure.CAN_FilterMode = CAN_FilterMode_IdMask;//IDÄ￡ê½


        CAN_FilterInitStructure.CAN_FilterScale = CAN_FilterScale_16bit;
        CAN_FilterInitStructure.CAN_FilterIdHigh = (id1 << 5);           
        CAN_FilterInitStructure.CAN_FilterIdLow =  (id2 << 5);       

        CAN_FilterInitStructure.CAN_FilterMaskIdHigh = (mask << 5);
        CAN_FilterInitStructure.CAN_FilterMaskIdLow  = (mask << 5);
        CAN_FilterInitStructure.CAN_FilterFIFOAssignment = CAN_Filter_FIFO0; //FIFO0
        CAN_FilterInitStructure.CAN_FilterActivation = ENABLE;

        CAN_FilterInit(&CAN_FilterInitStructure);
}