温度值不能正确显示求指导如何修改单片机程序 -

#include <reg52.h>
#include <intrins.h>
#include <lcd.h>
#define uchar unsigned char
#define uint unsigned int
sbit key1=P1^1; //设置键
sbit key2=P1^2; //加键
sbit key3=P1^3; //减键
sbit key4=P1^4; //退出键
sbit DQ=P1^7;
sbit beep=P1^0;
sbit led=P1^6;
sbit trig=P3^1;
sbit echo=P3^0;
uchar djshi,djfen=45,djmiao;
uchar r,num;
uint distance,t;
uchar l=25;
int wdz=0;
bit flag=0;
bit flag1s=0;
uchar code table1[]={"time: 00:00:00 "};
uchar code table3[14]={'0','1','2','3','4','5','6','7','8','9','.','-','M','C'};
uchar code table4[]={"wdz:"};
uchar cc[4]={0,0,0,0};
void startmodule();
void start();
void count();
void Delay1ms(uint n)
{
uint x,y;
for(x=n;x>0;x--)
for(y=110;y>0;y--);
}
void Init_ds18b20(void)
{
unsigned char x=0;
DQ = 1; //DQ拉高
Delay1ms(8);
DQ = 0; //DQ拉低，将总线拉低，持续时间为480us到960us之间
Delay1ms(80);
DQ = 1;
Delay1ms(14);
x=DQ;
Delay1ms(20);
}
unsigned char read(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;
Delay1ms(4);
}
}
return(dat);
}
void write(unsigned char dat)
{
unsigned char i=0;
for (i=8; i>0; i--)
{
DQ = 0;
DQ = dat&0x01;
if(DQ)
{
Delay1ms(1);
DQ = 1;
}
else
{
Delay1ms(5);
DQ = 1;
}
dat>>=1;
}
}
unsigned char readtemp(void)
{
unsigned char a=0,b=0;
unsigned int temp=0;
Init_ds18b20();
write(0xcc);// 跳过读序列号操作
write(0xcc);// 启动温度转换
Delay1ms(100);
write(0xcc);
write(0xbe);//读取温度寄存器
Delay1ms(100);
a=read();//读温度低位
b=read();//读温度高位
temp=((b*256+a)>>4); //当前采集温度除16得到实际温度
return(temp);
}
void display()
{
unsigned int temp0=0,temp1=0,temp2=0;
temp0=wdz/100;
temp1=(wdz%100)/10;
temp2=wdz%10;
Delay1ms(5);
lcd_writechar(11, 1, table3[temp0]);
Delay1ms(5);
lcd_writechar(12, 1, table3[temp0]);
Delay1ms(5);
lcd_writechar(13, 1, table3[temp0]);
Delay1ms(5);
lcd_writechar(14, 1, 0xdf);
Delay1ms(5);;
lcd_writechar(15, 1, table3[13]);
Delay1ms(5);
}
void LcdInit() //LCD初始化子程序
{
uchar i;
lcd_writecom(0x38); //开显示
Delay1ms(5);
lcd_writecom(0x38); //开显示
Delay1ms(5);
lcd_writecom(0x38); //开显示
Delay1ms(5);
lcd_writecom(0x38); //开显示
Delay1ms(5);
lcd_writecom(0x0c); //开显示不显示光标
lcd_writecom(0x06); //写一个指针加1
lcd_writecom(0x01); //清屏
lcd_writecom(0x80); //设置数据指针起点
for(i=0;i<16;i++)
{
lcd_writedate(table1[ i]);[ i]
}
}
void Timer0Init(void) //
{
TMOD |= 0x01; //使用定时器T0的模式1
TL0 = 15536%256; //设置定时0初值
TH0 = 15536/256; //设置定时0初值
TR0 = 1; //定时器0开始计时
ET0=1;
EA=1;
}
void Timer1Init(void) //
{
TMOD |= 0x10; //使用定时器T1的模式1
TL1 = 0; //设置定时1初值
TH1 = 0; //设置定时1初值
TR1 = 1; //定时器1开始计时
ET1=1;
EA=1;
}
void write_sfm(uchar add,uchar date)
{
lcd_writecom(0x80+add);
lcd_writedate(date/10+0x30);
lcd_writedate(date%10+0x30);
lcd_writecom(0x80+add+1);
}
void keyscan()
{
if(key1==0)
{
Delay1ms(5);
if(key1==0)
{
num++;
TR0=0;
while(!key1);
if(num==1)
{
lcd_writecom(0x0f);
lcd_writecom(0x8D);
}
if(num==2)
{
lcd_writecom(0x8A);
}
if(num==3)
{
lcd_writecom(0x87);
}
if(num==4)
{
num=0;
}
}
}
if(num==1)
{
if(key2==0)
{
Delay1ms(5);
if(key2==0)
{
djmiao++;
while(!key2); //等待按键释放
if(djmiao==60)
djmiao=0;
lcd_writecom(0x8c);
lcd_writedate(djmiao/10+0x30);
lcd_writedate(djmiao%10+0x30);
lcd_writecom(0x8D);
}
}
if(key3==0)
{
Delay1ms(5);
if(key3==0)
{
djmiao--;
while(!key3);
if(djmiao==255)
djmiao=59;
lcd_writecom(0x8c);
lcd_writedate(djmiao/10+0x30);
lcd_writedate(djmiao%10+0x30);
lcd_writecom(0x8D);
}
}
}
if(num==2)
{
if(key2==0)
{
Delay1ms(5);
if(key2==0)
{
djfen++;
while(!key2);
if(djfen==60)
djfen=0;
lcd_writecom(0x89);
lcd_writedate(djfen/10+0x30);
lcd_writedate(djfen%10+0x30);
lcd_writecom(0x8A);
}
}
if(key3==0)
{
Delay1ms(5);
if(key3==0)
{
djfen--;
while(!key3);
if(djfen==255)
djfen=59;
lcd_writecom(0x89);
lcd_writedate(djfen/10+0x30);
lcd_writedate(djfen%10+0x30);
lcd_writecom(0x8A);
}
}
}
if(num==3)
{
if(key2==0)
{
Delay1ms(5);
if(key2==0)
{
djshi++;
while(!key2);
if(djshi==24)
djshi=0;
lcd_writecom(0x86);
lcd_writedate(djshi/10+0x30);
lcd_writedate(djshi%10+0x30);
lcd_writecom(0x87);
}
}
if(key3==0)
{
Delay1ms(5);
if(key3==0)
{
djshi--;
while(!key3);
if(djshi==255)
djshi=23;
lcd_writecom(0x86);
lcd_writedate(djshi/10+0x30);
lcd_writedate(djshi%10+0x30);
lcd_writecom(0x87);
}
}
}
if(key4==0)
{
Delay1ms(5);
if(key4==0)
{
TR0=1;
lcd_writecom(0x0c);
}
}
}
void fmq()
{
beep=1;
Delay1ms(5);
beep=0;
Delay1ms(5);
}
void main()
{
led=1;
LcdInit();
Init_ds18b20();
Timer0Init();
Timer1Init();
lcd_writestring(7,1,table4);
trig=0;
while(1)
{
if(flag1s)
{
flag1s=0;
startmodule();
start();
count();
}
wdz=read();
display();
keyscan();
if(djshi==0 && djfen==0 &&djmiao==0) //倒计时时间到
{
TR0=0; //停止计时
fmq();
led=~led;
}
}
}
void Timer0() interrupt 1
{
TL0 = 15536%256; //设置定时初值
TH0 = 15536/256; //设置定时初值
r++;
if(r==20)
{
r=0;
djmiao--;
if(djmiao==255)
{
djmiao=59;
djfen--;
if(djfen==255)
{
djfen=59;
djshi--;
if(djshi==255)
{
djshi=0;
}
if(djshi==0)
djfen=59;
if(djfen==0&djshi==0)
djfen=0;
write_sfm(6,djshi);
}
write_sfm(9,djfen);
}
write_sfm(12,djmiao);
flag1s=1;
}
}
void Timer1() interrupt 3
{
flag=1;
}
void startmodule()
{
trig=1;
_nop_(); _nop_(); _nop_(); _nop_();
_nop_(); _nop_(); _nop_(); _nop_();
_nop_(); _nop_(); _nop_(); _nop_();
_nop_(); _nop_(); _nop_(); _nop_();
_nop_(); _nop_(); _nop_(); _nop_();
_nop_(); _nop_(); _nop_(); _nop_();
trig=0;
}
void start()
{
while(!echo); //当Echo为零时等待
TR1=1; //开启
while(echo); //当Echo为1计数并等待
TR1=0; //关闭
}
void count()
{
t=TH1*256+TL1;
TH1=0;
TL1=0;
distance=t*0.17;
if(distance >=600)
{
lcd_writechar(0, 1, table3[11]);
lcd_writechar(1, 1, table3[11]);
lcd_writechar(2, 1, table3[10]);
lcd_writechar(3, 1, table3[11]);
lcd_writechar(4, 1, table3[13]);
lcd_writechar(5, 1, table3[12]);
}
else if(distance <= 0)
{
lcd_writechar(0, 1, table3[11]);
lcd_writechar(1, 1, table3[11]);
lcd_writechar(2, 1, table3[10]);
lcd_writechar(3, 1, table3[11]);
lcd_writechar(4, 1, table3[13]);
lcd_writechar(5, 1, table3[12]);
}
else
{
cc[1]=distance/100;
cc[2]=distance/10%10;
cc[3]=distance%10;
lcd_writechar(0, 1, table3[cc[1]]);
lcd_writechar(1, 1, table3[cc[2]]);
lcd_writechar(2, 1, table3[10]);//显示点
lcd_writechar(3, 1, table3[cc[3]]);
lcd_writechar(4, 1, table3[13]);//显示点
lcd_writechar(5, 1, table3[12]);
if(distance<=245)
{
beep=0;
led=~led;
}
else if(distance>=255)
{
beep=0;
led=~led;
}
else
{
beep=1;
led=1;
}
}
}

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