C8051F020采集按键信号，然后通过按键信号控制内部的AD采集，并且通过7279驱动LED，显示最终的信号结果-C8051F020 signal acquisition button, then the internal control of AD acquisition through a key signal, and the 7279 driver LED, display the final results of the signal

利用7279及键盘显示接口电路，编程实现按键的读取，并将按键值显示在数码管上。-The use of 7279 and keyboard display interface circuit, programming to read the key, and the key value displayed on the digital tube.

单片机实验，实现一些单片机实验,基本并行I/O口实验 扩展并行I/O口实验 静态LED显示实验 矩阵键盘扫描实验 LCD 1602显示实验 ADC0808/9信号采集实验 按键声报警实验 8255扩展I/O口及交通信号灯控制实验 7279键盘扫描及动态LED显示实(single-chip computer experiment)