用51的MCU的IO方式控制74HC595驱动8位数码管(4位共阴4位共阳)使用Timer0的16位自动重装来产生1ms节拍,程序运行于这个节拍下, ADC按键和行列扫描按键均影射成统一的键码, ADC按键键码为1~16, 行列扫描按键键码为17~32.-Way with 51 MCU IO control 74 hc595 are needed drive eight digital tube (4, a total of four Yin Yang) Timer0 16 automatic reshipment is used to produce 1 ms beats, program running on the beat, the ADC key procession and scanning are mapped into a unified key code, ADC button for 1 ~ 16 key code, line scan button key code for 17 ~ 32.