基于at89s52单片机的模数转换c51源程序。单片机与模数转换模块PCF859相连，总线协议为iic。单片机与上位机用串口线相连，传输速率为9600bps。可实现模数转换模块与电脑端的通信。可在PC端用串口调试软件方便地对PCF859进行实验。-AT89S52-based single-chip analog-digital conversion of the C51 source. Microcontroller and analog-digital conversion module connected PCF859, bus protocol for iic. Microcontroller and PC connected by serial lines, transmission rate of 9600bps. Can achieve analog-digital conversion module with computer-side communication. Can be used in the PC-side debugging software serial PCF859 conveniently carry out such experiments.