秒表毕业论文（参考）汇总(7)

附录2 源程序

#include

char code tab[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xff}; 码表

char code tab1[]={0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,0x10};//小数点 char code index[]={0xef,0xdf,0xbf,0x7f}; //每位数字对应数码管显示位置

unsigned char num[4]; int sec_fei=0;

sbit key1=P3^0; sbit key2=P3^1; sbit key3=P3^2;

//开始 //停止 //清零

//数字对应显示

void delay(unsigned int z) { unsigned int i,j; for(i=0;i

void init() { TMOD=0x01; TH0=0xd8;

TL0=0xf0;

//定时10ms

ET0=1; TR0=0; EA=1; }

void display() { unsigned char i; num[0]=sec_fei; num[3]=sec_fei/1000; for(i=0;i<4;i++) { P2=index[i]; if(i==2) P0=tab1[num[i]]; else P0=tab[num[i]];

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delay(1); //修改此参数可修改刷新频率

P0=0xff; } }

void main() { init(); while(1) {

display(); TR0=0;

if(key3==0&&TR0==0)

//复位按钮

//刷屏显示数码管

if(key2==0) //tingzhi按钮

sec_fei=0; } }

void T0_time() interrupt 1 { }

TH0=0xd8; //定时器定时时间为50ms TL0=0xf0;

if(sec_fei>=10000) sec_fei=0;

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