基于STC89C52的双机通信，用C语言实现单行显示，发送机点击按键发送，接收端将接收到的字符双行显示在液晶屏幕上(STC89C52 based dual communication, the single line display is realized in the C language, the transmitter clicks the key to send, and the receiver will receive the received characters on the LCD screen)