电信pos机程序，包含8583包的打包解包程序，和对2.4g读卡器等操作-Telecom pos machine program, including 8583 packages unpack the package procedures, and the card reader and other operations 2.4g

pic18f芯片的USART串口通讯模块的利用，程序实现了串口的初始化、接收与发送中断及数据的解包打包和发送过程。-pic18f chip USART serial communication module to use, the program achieved a serial port initialization, receiving and sending interrupts and data packing and sending the process of unpacking.