利用方式1实现单片机双机通信，主频为6M，波特率为2400bps，电路见图5-10。当两个单片机距离较近时，甲、乙两机的发送端与接收端分别直接相联，两机共地。执行程序，甲机将亮灯信号发送给乙机，若通信正常，乙机接收到信号后点亮20个发光二极管。乙机采用查询与中断两种工作方式。当然20个LED乙机可单独控制，也可接受甲机的控制，并执行甲机指令，还需要进一步完善程序.

甲机发送程序：-Use to achieve a single-chip dual-machine communications, and frequency for the 6M, the baud rate is 2400bps, circuit see Figure 5-10. When the close proximity of the two single-chip, the A, B two planes of the sending end and receiving end were directly linked to the two aircraft were to. Implementation of procedures, a machine will light signal sent to the B machine, if the normal communication, machine B receives signal light emitting diodes 20. B machine using two types of inquiries with the interruption of work. Of course, machine 20 LED B can be individually controlled, but also acceptable to control a machine, and the implementation of a machine instruction, but also the need to further improve the process. A send process: