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1、单片机利用中断实现时分秒时钟（附仿真图）基于89c51单片机程序：#include #define uchar unsigned charcode unsigned char ke=0xee,0xde,0xbe,0x7e,0xed,0xdd,0xbd,0x7d,0xeb,0xdb,0xbb,0x7b,0xe7,0xd7,0xb7,0x77;code unsigned char led=0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90;uchar key();/声明函数keyvoid delay(i); /声明函数delayvoid main(v
2、oid) uchar i;while(1)i=key();P2=0x02;P0=ledi%10;delay(50);P2=0x01;P0=ledi/10;delay(50);void delay(i) /延时函数 unsigned char j;for(;i0;i-)for(j=0;j120;j+);uchar key(void) /线反转法uchar h,j,a;P1=0x0f;a=P1|0xf0;if(a=0xff)return(99);delay(10);P1=0xf0;h=P1|0x0f;P1=0xff;a=a&h;for(j=0;j16;j+)if(a=kej)return(j);return(99);仿真图：
