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#define uchar unsigned char
#define uint unsigned int
#define DQ P3_7
#include<AT89X51.H>
uint sec;
uint min=05;
uint hour=13;
uint day=19;
uint month=7;
uint yearl=17;
uint yearh=20;
uint tcnt;
uint cursor=0;
uchar a=0xff;
uchar code Seg[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
void delay(uint t)
{
uint i;
while(t--)
{for (i=0;i<125;i++);}
}
void Tdelay(unsigned int i)
{
while(i--);
}
void Kdelay()
{
uchar i,j;
for(i=100;i>0;i--)
for(j=248;j>0;j--);
}
Init_DS18B20(void)
{
unsigned char x=0;
DQ = 1;
Tdelay(8);
DQ = 0;
Tdelay(80);
DQ = 1;
Tdelay(14);
Tdelay(20);
}
//讀一個字節
ReadOneChar(void)
{
unsigned char i=0;
unsigned char dat = 0;
for (i=8;i>0;i--)
{
DQ = 0;
dat>>=1;
DQ = 1;
if(DQ)
dat|=0x80;
Tdelay(4);
}
return(dat);
}
//寫一個字節
WriteOneChar(unsigned char dat)
{
unsigned char i=0;
for (i=8; i>0; i--)
{
DQ = 0;
DQ = dat&0x01;
Tdelay(5);
DQ = 1;
dat>>=1;
}
}
//讀取溫度
ReadTemperature(void)
{
unsigned char a=0;
unsigned char b=0;
unsigned int t=0;
float tt=0;
Init_DS18B20();
WriteOneChar(0xCC);
WriteOneChar(0x44);
Init_DS18B20();
WriteOneChar(0xCC);
WriteOneChar(0xBE);
a=ReadOneChar();
b=ReadOneChar();
t=b;
t<<=8;
t=t|a;
tt=t*0.0625;
t= tt*10+0.5;
return(t);
}
void display(uchar L1,uchar L2,uchar L3,uchar L4,uchar L5,uchar L6,uchar L7,uchar L8,uchar L9,uchar L10,uchar L11,uchar L12,uchar L13,uchar L14,uchar L15,uchar L16)
{
P2=0x7F;P0=L1;delay(1); //yearh
P2=0xBF;P0=L2;delay(1); //yearh
if(cursor==6){P2=0xDF|a;P0=L3;delay(1);}else{P2=0xDF;P0=L3;delay(1);} //yearl
if(cursor==6){P2=0xEF|a;P0=L4;delay(1);}else{P2=0xEF;P0=L4;delay(1);} //yearl
if(cursor==5){P2=0xF7|a;P0=L5;delay(1);}else{P2=0xF7;P0=L5;delay(1);} //month
if(cursor==5){P2=0xFB|a;P0=L6;delay(1);}else{P2=0xFB;P0=L6;delay(1);} //month
if(cursor==4){P2=0xFD|a;P0=L7;delay(1);}else{P2=0xFD;P0=L7;delay(1);} //day
if(cursor==4){P2=0xFE|a;P0=L8;delay(1);}else{P2=0xFE;P0=L8;delay(1);} //day
P2=0xFF;
if(cursor==3){P1=0x7F|a;P0=L9;delay(1);}else{P1=0x7F;P0=L9;delay(1);} //hour
if(cursor==3){P1=0xBF|a;P0=L10;delay(1);}else{P1=0xBF;P0=L10;delay(1);} //hour
if(cursor==2){P1=0xDF|a;P0=L11;delay(1);}else{P1=0xDF;P0=L11;delay(1);} //min
if(cursor==2){P1=0xEF|a;P0=L12;delay(1);}else{P1=0xEF;P0=L12;delay(1);} //min
if(cursor==1){P1=0xF7|a;P0=L13;delay(1);}else{P1=0xF7;P0=L13;delay(1);} //sec
if(cursor==1){P1=0xFB|a;P0=L14;delay(1);}else{P1=0xFB;P0=L14;delay(1);} //sec
P1=0xFD;P0=L15;delay(1); //temp
P1=0xFE;P0=L16;delay(1); //temp
P1=0xFF;
}
main()
{
uint i;
TMOD=0x02; //設置模式為定時器T0的模式2 （8位自動重裝計數初值的計數值）
TH0=0x06; //設置計數器初值，靠TH0存儲重裝的計數值X0=256-250=6
TL0=0x06;
TR0=1; //啟動T0
ET0=1; //開啟定時器T0中斷允許
EA=1; //開啟中斷總控制
while(1)
{
if(P3_4==0)
{if(P3_5==0)
P3_6=1;}
else P3_6=0;
if(P3_0==0)
{
Kdelay();
if(P3_0==0)
{
cursor++;
if(cursor>=7){cursor=0;}
}
}
if(P3_1==0)
{
Kdelay();
if(P3_1==0)
{
if(cursor==1){sec++;if(sec==60)sec=0;}
if(cursor==2){min++;if(min==60)min=0;}
if(cursor==3){hour++;if(hour==24)hour=0;}
if(cursor==4){day++;if(day==31)day=0;}
if(cursor==5){month++;if(month==12)month=0;}
if(cursor==6){yearl++;if(yearl==100)yearl=0;}
if(cursor==7){yearh++;if(yearh==30)yearh=20;}
}
}
if(P3_2==0)
{
Kdelay();
if(P3_2==0)
{
if(cursor==1){sec--;}
if(cursor==2){min--;}
if(cursor==3){hour--;}
if(cursor==4){day--;}
if(cursor==5){month--;}
if(cursor==6){yearl--;}
if(cursor==7){yearh--;}
}
}
i=ReadTemperature();
display(Seg[yearh/10],Seg[yearh%10],Seg[yearl/10],Seg[yearl%10],Seg[month/10],Seg[month%10],Seg[day/10],Seg[day%10],Seg[hour/10],Seg[hour%10],Seg[min/10],Seg[min%10],Seg[sec/10],Seg[sec%10],Seg[i/100],Seg[i/10%10]);
}
}
void t0(void)interrupt 1 using 0 //t0的中斷程序
{
tcnt++;
if(tcnt==4000)//定時器的定時計數，4000次250us為1秒
{
tcnt=0;
P3_3=0;
a=~a;
sec++;
if(sec==60)
{
sec=0;
min++;
if(min==60)
{
min=0;
P3_3=1;
hour++;
if(hour==24)
{
hour=0;
day++;
if(month==2&&((yearl==0&&yearh%4==0)||(yearl!=0&&yearl%4==0))&&day==30)day=1;
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