单片机与单片机通信实例（主机） 功能：通过串口与从机与主机的通信，对从机1发出问询帧，然后接收从机1 的脉冲数，通过简单计算得出电压控制值，通过串口发给从机2-Examples of single-chip MCU and Communication (host) function: through the serial port and from the machine with the host communications, on information sent fro

2． 用8251A实现串行口异步通信，自发自收，波特率1200bps。采用查询方式发送、中断方式接收。从键盘输入字符串（字符个数≤255）存入发送缓冲区并显示，启动发送键由实验者自己定义，自收结果显示于屏幕。按Esc返回DOS。（定义回车键为启动发送键）-2. With the 8251A Serial port asynchronous communication, spontaneous self-income, the baud rate 1200bps. Using query mode

用8251实现串行口异步通信，自发自收，波特率1200bps。采用查询方式发送与接收。从键盘输入发送字符。发送与接收的字符均在屏幕上显示。按esc键返回dos-Achieved with the 8251 serial asynchronous communication, spontaneous self-income, the baud rate 1200bps. Way to send and receive using queries. To send characters from t