PIC16887A单片机一个双机通信，2个单片机异步串行通信接口相连方式为：RX和TX交叉对接，左边的单片机U1，每按下按键S1就发送一个字节数，从0x20开始发送，每送一个数据，此数加1.发送的同时在D口上输出。右边单片机U2为接收状态，采用中断方式，如有接收中断，则进入中断，将接收到的数直接在D口上输出-PIC16887A a two-machine communications microcontroller, two asynchronous serial communication interface connected to Microcontroller way: RX and TX cross-docking, the left side of the microcontroller U1, S1 each key is pressed to send a number of bytes, starting from 0x20 to send, each send a data, this number plus 1. send the output port D at the same time. Right of the microcontroller U2 to receive state, the use of interrupt and, if receive interrupt, the interrupt will be received directly on the number of output port D