software_reset.rar_reset

#include<reg52.h> #define uint unsigned int #define uchar unsigned char sbit dula=P2^6; sbit wela=P2^7; sfr ISP_CONTR=0xe7;//ISP/IAP控制寄存器 uchar num; uchar code table[]= { 0x3f,0x06,0x5b,0x4f, 0x66,0x6d,0x7d,0x07, 0x7f,0x6f,0x77,0x7c, 0x39,0x5e,0x79,0x71 }; void delayms(int x) { uint i,j; for(i=x;i>0;i--) for(j=125;j>0;j--); } void display(uchar shi,uchar ge) { dula=1; P0=table[shi]; //数码管十位 dula=0; //数码管个位 P0=0xff; wela=1; P0=0xfe; wela=0; delayms(5); dula=1; P0=table[ge]; dula=0; P0=0xff; wela=1; P0=0xfd; wela=0; delayms(5); } void main() { uchar num1,shi,ge; TMOD=0X01; TH0=(65536-50000)/256; TL0=(65536-50000)%256; EA=1; ET0=1; TR0=1; while(1) { if(num>=20) {num=0; num1++; if(num1==10) { ISP_CONTR=0x20; } shi=num1/10; ge=num1%10; } display(shi,ge); } } void a()interrupt 1 { TH0=(65536-50000)/256; TL0=(65536-50000)%256; num++; }