单片机对rs232串口读写,接收传来的ascii码，并且将码解析成可以显示的bcd码，根据命令发送存储器或接口的代码，转换成ascii码送出rs232串口。-Rs232 serial port to read and write single-chip, to receive from the ascii code, and code analysis into bcd code that can be displayed, in accordance with an order to send