PCB板全部文件，以及原理图，和上面的原代码相同 -#include <reg52.h> #include <absacc.h> #define uchar unsigned char #define PA8255 XBYTE[0x3ffc] #define PB8255 XBYTE[0x3ffd] #define PC8255 XBYTE[0x3ffe] #define COM8255 XBYTE[0x3fff] #defin

基于AT89C51+MAX7219的频率计 附带proteus仿真电路图 实际硬件电路测试通过-FREQ design Base on AT89C51+MAX7219,include sim DSN and hardware SCH