#include <AT89X51.h>
#define uint unsigned int
#define uchar unsigned char
#define SET P3_1
#define DEC P3_2
#define ADD P3_3
#define BEEP P3_6
#define ALAM P1_2
#define DQ P3_7
bit shanshuo_st;
bit beep_st;
sbit DIAN = P0^5;
uchar x=0;
signed char m;
uchar n;
uchar set_st=0;
signed char shangxian=38;
signed char xiaxian=5;
uchar code
LEDData[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0xff};
void Delay_DS18B20(int num)
{
while(num--); }
void Init_DS18B20(void)
{
unsigned char x=0;
DQ = 1;
Delay_DS18B20(8);
DQ = 0;
Delay_DS18B20(80);
DQ = 1;
Delay_DS18B20(14);
x = DQ;
Delay_DS18B20(20);
}
unsigned char 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;
Delay_DS18B20(4);
}
return(dat);
}
void WriteOneChar(unsigned char dat)
{
unsigned char i=0;
for (i=8; i>0; i--)
{
DQ = 0;
DQ = dat&0x01;
Delay_DS18B20(5);
DQ = 1;
dat>>=1;
}
}
unsigned int 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(); //讀低8位
b=ReadOneChar();
t=b;
t<<=8;
t=t|a;
tt=t*0.0625;
t= tt*10+0.5;
return(t);
}
void Delay(uint num)
{
while( --num );
}
void InitTimer(void)
{
TMOD=0x1;
TH0=0x3c;
TL0=0xb0;
}
void check_wendu(void)
{
uint a,b,c;
c=ReadTemperature()-5;
a=c/100;
b=c/10-a*10;
m=c/10;
n=c-a*100-b*10;
if(m<0){m=0;n=0;}
if(m>99){m=99;n=9;}
}
void Disp_init(void)
{
P0 = ~0x80;
P2 = 0x7F;
Delay(200);
P2 = 0xDF;
Delay(200);
P2 = 0xF7;
Delay(200);
P2 = 0xFD;
Delay(200);
P2 = 0xFF;
}
void Disp_Temperature(void)
{
P0 = ~0x98;
P2 = 0x7F;
Delay(400);
P0= ~LEDData[n];
P2 = 0xDF;
Delay(400);
P0 = ~LEDData[m%10];
DIAN = 0;
P2 = 0xF7;
Delay(400);
P0 = ~LEDData[m/10];
P2 = 0xFD;
Delay(400);
P2 = 0xFF;
}
void Disp_alarm(uchar baojing)
{
P0 =~0x98;
P2 = 0x7F;
Delay(200);
P0 =~LEDData[baojing%10];
P2 = 0xDF;
Delay(200);
P0 =~LEDData[baojing/10];
P2 = 0xF7;
Delay(200);
if(set_st==1)P0 =~0xCE;
else if(set_st==2)P0 =~0x1A;
P2 = 0xFD;
Delay(200);
P2 = 0xFF;
}
void Alarm()
{
if(x>=10){beep_st=~beep_st;x=0;}
if((m>=shangxian&&beep_st==1)||(m<xiaxian&&beep_st==1))
{
BEEP=0;
ALAM=0;
}
else
{
BEEP=1;
ALAM=1;
}
}
void main(void)
{
uint z;
InitTimer();
EA=1; //全局中斷開關
TR0=1;
ET0=1; //開啟定時器0
IT0=1;
IT1=1;
check_wendu();
check_wendu();
for(z=0;z<300;z++)
{
Disp_init();
}
while(1)
{
if(SET==0)
{
Delay(2000);
do{}while(SET==0);
set_st++;x=0;shanshuo_st=1;
if(set_st>2)set_st=0;
}
if(set_st==0)
{
EX0=0;
EX1=0;
check_wendu();
Disp_Temperature();
Alarm();
}
else if(set_st==1)
{
BEEP=1;
ALAM=1;
EX0=1; //開啟外部中斷0
EX1=1;
if(x>=10){shanshuo_st=~shanshuo_st;x=0;}
if(shanshuo_st) {Disp_alarm(shangxian);}
}
else if(set_st==2)
{
BEEP=1; //關閉蜂鳴器
ALAM=1;
EX0=1; //開啟外部中斷0
EX1=1;
if(x>=10){shanshuo_st=~shanshuo_st;x=0;}
if(shanshuo_st) {Disp_alarm(xiaxian);}
}
}
}
void timer0(void) interrupt 1
{
TH0=0x3c;
TL0=0xb0;
x++;
}
void int0(void) interrupt 0
{
EX0=0;
if(DEC==0&&set_st==1)
{
do{
Disp_alarm(shangxian);
}
while(DEC==0);
shangxian--;
if(shangxian<xiaxian)shangxian=xiaxian;
}
else if(DEC==0&&set_st==2)
{
do{
Disp_alarm(xiaxian);
}
while(DEC==0);
xiaxian--;
if(xiaxian<0)xiaxian=0;
}
}
void int1(void) interrupt 2
{
EX1=0;
if(ADD==0&&set_st==1)
{
do{
Disp_alarm(shangxian);
}
while(ADD==0);
shangxian++;
if(shangxian>99)shangxian=99;
}
else if(ADD==0&&set_st==2)
{
do{
Disp_alarm(xiaxian);
}
while(ADD==0);
xiaxian++;
if(xiaxian>shangxian)xiaxian=shangxian;
}
}
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