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#include<reg52.h>
#include <intrins.H>
#include <math.H>
#define uchar unsigned char
#define uint unsigned int
sbit dula=P2^6;
sbit wela=P2^7;
sbit rs=P3^5;
sbit lcden=P3^4;
sbit s1=P3^0;
sbit s2=P3^1;
sbit s3=P3^2;
sbit rd=P3^7;
sbit ds = P2^2;//ÎÂ¶è′«¸DÆ÷DÅoÅÏß
uchar why,s1num;
char shi,fen,miao;
//-----------------------------------------------??
uchar code table[]="wendu:";
uchar code table1[]="00:00:00";
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--);
for(y=110;y>0;y--);
}
void write_com(uchar com)
{
rs=0;
lcden=0;
P0=com;
delay(5);
lcden=1;
delay(5);
lcden=0;
}
void write_data(uchar date)
{
rs=1;
lcden=0;
P0=date;
delay(5);
lcden=1;
delay(5);
lcden=0;
}
void init()
{
uchar num;
dula=0;
wela=0;
lcden=0;
write_com(0x38);
write_com(0x0c);
write_com(0x06);
write_com(0x01);
write_com(0x80);
for(num=0;num<6;num++)
{
write_data(table[num]);
delay(20);
}
write_com(0x80+0x40);
for(num=0;num<8;num++)
{
write_data(table1[num]);
delay(20);
}
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
}
void write_string(uchar * str, uchar length)
{
uchar i;
for(i = 0; i < length; i++)
{
write_data(str[i]);
}
}
//-----------------------------------------------........................................................................ê±¼ä
void write_sfm(uchar add,uchar date)
{
uchar shi,ge;
shi=date/10;
ge=date%10;
write_com(0x80+0x40+add);
write_data(0x30+shi);
write_data(0x30+ge);
}
void keyscan()
{
rd=0;
if(s1==0)
{
delay(5);
if(s1==0)
{
s1num++;//????
while(!s1);//??s1??
if(s1num==1)
{
TR0=0;
write_com(0x80+0x40+6);//????
write_com(0x0f);
}
if(s1num==2)
{
write_com(0x80+0x40+3);//????
}
if(s1num==3)
{
write_com(0x80+0x40+0);//????
}
if(s1num==4)
{
s1num=0;
write_com(0x0c);
TR0=1;//?????,????,?????
}
}
}
if(s1num!=0)
{
if(s2==0)
{
delay(5);
if(s2==0)
{
while(!s2);//????
if(s1num==1)//?????????
{
miao++;
if(miao==60)
miao=0;
write_sfm(6,miao);
write_com(0x80+0x40+6);
}
if(s1num==2)//...?
{
fen++;
if(fen==60)
fen=0;
write_sfm(3,fen);
write_com(0x80+0x40+3);
}
if(s1num==3)//...?
{
shi++;
if(shi==24)
shi=0;
write_sfm(0,shi);
write_com(0x80+0x40+0);
}
}
}
if(s3==0)
{
delay(5);
if(s3==0)
{
while(!s3);
if(s1num==1)//?????????
{
miao--;
if(miao==-1)
miao=59;
write_sfm(6,miao);
write_com(0x80+0x40+6);
}
if(s1num==2)//...?
{
fen--;
if(fen==-1)
fen=59;
write_sfm(3,fen);
write_com(0x80+0x40+3);
}
if(s1num==3)//...?
{
shi--;
if(shi==-1)
shi=23;
write_sfm(0,shi);
write_com(0x80+0x40+0);
}
}
}
}
}
void timer0() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
why++;
if(why==20)
{
why=0;
miao++;
if(miao==60)
{
miao=0;
fen++;
if(fen==60)
{
fen=0;
shi++;
if(shi==24)
{
shi=0;
}
write_sfm(0,shi);
}
write_sfm(3,fen);
}
write_sfm(6,miao);
}
}
//.........................................................................................................
//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ÎÂ¶è
void dsInit()//DS18B20¸′Î»￡¬3õê¼»ˉoˉêy
{
unsigned int i;
ds = 0;
i = 100;
while(i>0) i--;
ds = 1;
i = 4;
while(i>0) i--;
}
void dsWait()
{
unsigned int i;
while(ds);
while(~ds);
i = 4;
while(i > 0) i--;
}
bit readBit()
{
unsigned int i;
bit b;
ds = 0;
i++;
ds = 1;
i++; i++;
b = ds;
i = 8;
while(i>0) i--;
return b;
}
unsigned char readByte()
{
unsigned int i;
unsigned char j, dat;
dat = 0;
for(i=0; i<8; i++)
{
j = readBit();
dat = (j << 7) | (dat >> 1);
}
return dat;
}
void writeByte(unsigned char dat)
{
unsigned int i;
unsigned char j;
bit b;
for(j = 0; j < 8; j++)
{
b = dat & 0x01;
dat >>= 1;
if(b)
{
ds = 0; i++; i++;
ds = 1;
i = 8; while(i>0) i--;
}
else
{
ds = 0;
i = 8; while(i>0) i--;
ds = 1;
i++; i++;
}
}
}
void sendChangeCmd()//¿aê¼»ñè¡ÎÂ¶è2￠×a»»
{
dsInit();
dsWait();
delay(1);
writeByte(0xcc);
writeByte(0x44);
}
void sendReadCmd()
{
dsInit();
dsWait();
delay(1);
writeByte(0xcc);
writeByte(0xbe);
}
int getTmpValue()
{
unsigned int tmpvalue;
int value;
float t;
unsigned char low, high;
sendReadCmd();
low = readByte(); //¶á¸ß°ËÎ»
high = readByte();//¶áμíËÄÎ»
tmpvalue = high;
tmpvalue <<= 8;//á½¸ö×Ö½ú×éoÏÎaò»¸ö×Ö
tmpvalue |= low;
value = tmpvalue;
\
t = value * 0.0625;//ÎÂ¶èÔú¼Ä′æÆ÷ÖDÎ»12Î»￡¬·Ö±æÂêÎa0.0625¡ã
value = t * 100 + (value > 0 ? 0.5 : -0.5); //μ±value>0ê±￡¬value=t*100+0.5--------
return value;//valueêÇÕûDÎ
}
void display(int v)
{
unsigned char count;
unsigned char datas[] = {0, 0, 0, 0, 0};
unsigned int tmp = abs(v);
datas[0] = tmp / 10000;
datas[1] = tmp % 10000 / 1000;
datas[2] = tmp % 1000 / 100;
datas[3] = tmp % 100 / 10;
datas[4] = tmp % 10;
write_com(0x80+6);
if(v < 0)
{
write_string("- ", 2);//"-"êÇ×Ö·û′®
}
else
{
write_string("+ ", 2);
}
if(datas[0] != 0)
{
write_data('0'+datas[0]);
}
for(count = 1; count != 5; count++)
{
write_data('0'+datas[count]);
if(count == 2)
{
write_data('.');
}
}
}
void main()
{
uchar table[] = "wendu: ";
sendChangeCmd();//ÎÂ¶è×a»»oˉêy
init();
while(1)
{
delay(1000); //750ms
write_com(0x80);
display(getTmpValue());
sendChangeCmd();
keyscan();
}
while(1);
}

復制代碼

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