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| #include <reg51.h>
typedef unsigned char uchar;
typedef unsigned int uint;
//按键定义
sbit key_stop = P2^0;
sbit key_star = P2^1;
sbit key_fen = P2^2;
sbit key_shi = P2^3;
//0~9的十六进制数码
//uchar code num[10] = {0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x82, 0xF8, 0x80, 0x90}; // 0~9 7SegCA共阳数码管
//1100 0000,1001 1111,
unsigned char code num[] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
//共阴0-F段码，加code是存在rom里面
//秒、分、时标志
uchar miao = 0, fen = 0, shi = 0;
//秒、分、时高位低位
uchar miao_L, miao_H, fen_L, fen_H, shi_L, shi_H;
//计数
uint counter = 0;
void delay(uint x){ //毫秒延时函数
unsigned int i=0,j=0;
for(i=0;i<x;i++)
for(j=0;j<123;j++);
;
}//delay
void key\_delay(int xms){ //按键延时函数 x ms
unsigned int i, j;
for(i=0; i<xms; ++i)
for(j=0; j<110; ++j)
;
}//key\_delay
void T0\_Init(){ //定时器初始化
TMOD = 0x01;
TH0 = 0x3c;
TL0 = 0xb0;
EA = 1; //开总中断
ET0 = 1;
TR0 = 1;
}//T0\_Init
void display(){ //显示函数
//P1 = 0x20; //0010 0000
P1 =0xdf;
P0 = 0x40; //段选显示-
delay(2);
// P1 = 0x04; //位选0000 0100
P1 =0xfb;
P0 = 0x40;//段选显示-
delay(2);
//P1 = 0x40; // 1000 0000
P1=0X7F;
P0 = num[miao_L];
delay(2);
// P1 = 0x80; // 0100 0000
P1=0XBF;
P0 = num[miao_H];
delay(2);
// P1 = 0x08; // 0001 0000
P1=0XEF;
P0 = num[fen_L];
delay(2);
// P1 = 0x10; // 0000 1000
P1=0XF7;
P0 = num[fen_H];
delay(2);
// P1 = 0x01; // 0000 0010
P1=0XFD;
P0 = num[shi_L];
delay(5);
// P1 = 0x02; // 0000 0001
P1=0XFE;
P0 = num[shi_H];
delay(5);
}//display
void keyscan(){ //按键函数
if(key_stop == 0){
key\_delay(10);
if(key_stop == 0){
EA = 0; //关总中断，即停止
while(!key_stop);
}
}//key\_stop
if(key_star == 0){
key\_delay(10);
if(key_star == 0){
EA = 1; //开总中断
while(!key_star);
}
}//key\_star
if(key_fen == 0){
key\_delay(10);
if(key_fen == 0){
fen++;
while(!key_fen);
}
}//key\_fen++
if(key_shi == 0){
key\_delay(10);
if(key_shi == 0){
shi++;
while(!key_shi);
}
}//key\_shi++
}
void main(){
T0\_Init();
while(1){
display();
keyscan();
}
}
void timer0\_Init() interrupt 1{ //中断函数
TL0 =(65536-50000)%256;//50ms预装载值
TH0 =(65536-50000)/256;
counter++;
//1秒钟=50ms\*20=1000ms，20次计数为1秒钟
if(counter == 20){
counter = 0;
miao++; //i = 100
if(miao == 60){
miao = 0;
fen++;
if(fen == 60){
fen = 0;
shi++;
if(shi == 24){
shi = 0;
fen = 0;
miao = 0;
}
}
}
miao_L = miao%10;
miao_H = miao/10;
fen_L = fen%10;
fen_H = fen/10;
shi_L = shi%10;
shi_H = shi/10;
}
}//timer0\_Init
|
