通过串口接收中断，如果接收到的数据流为14个数据，同时第一个数据为0x72，则把收到的后13个数据通过PIC内部CAN控制器，以标准帧或扩展帧的格式发送CAN总线上。-Through the serial port receive interrupt, if the received data stream is 14, while the first data for the 0x72, put the data received by the PIC after the 13 internal CAN controller, a standard or extended format to send the CAN bus on.