八路电压表C程序

使用AT89C52单片机，12MHZ晶振，P0口读入AD值，P2口作AD控制，用共阳LED数码管

P1口输出段码，P3口扫描，最高位指示通道（0-7）。-Eight-way voltage meter C program using AT89C52 single-chip, 12MHZ crystal, P0 I read into the AD value, P2 I make AD control, with a total of P1 Yang LED digital tube output above code, P3 port scan, the maximum channel bit instructions (0-7).