说明：  单片机按键程序，原代码提供各位参考和大家一同学习
(#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] #define IN0 XBYTE[0x1000] void ADC(void) sbit cs138=P1^6 uchar AdcValue main() {cs138=0 COM8255=0x81 EA=1 IE=0x81 IT0=1 IN0=0 while(1) {PA8255=PB8255=AdcValue } } void ADC(void) interrupt 0 using 1 {AdcValue=IN0 IN0=0 } )