51单片机教室智能照明控制系统原理图+PCB 仿真图源程序等资料分享 -

#include <reg51.h>
#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int
uchar time_data[7];
uchar code write_add[7]={0x8c,0x8a,0x88,0x86,0x84,0x82,0x80}; //数据的地址
uchar code read_add[7]={0x8d,0x8b,0x89,0x87,0x85,0x83,0x81};
uchar code table1[]="C: 00|2000/00/00";
uchar code table2[]="T: 00|00:00:00 0";
uchar code table3[]=" "; //清屏内容
uchar code table4[]=" Set Real Time ";
uchar code table5[]=" Set Open Time ";
uchar code table6[]=" Start Time: ";
uchar code table7[]=" 00:00:00 ";
uchar code table8[]=" End Time: ";
uchar code table9[]="Date: 2000/00/00";
uchar code table0[]="Time: 00:00:00 0";
bit Adjust; //调节标志位，=1表示进入调节模式，=0是正常模式
bit Auto_flg; //自动模式标志位，=1表示手动模式，=0是自动模式
sbit rs=P1^0; //LCD1602
sbit rw=P1^1; //LCD1602
sbit e=P1^2; //LCD1602
sbit sck=P2^5; //时钟端口
sbit io=P2^6; //时钟端口
sbit rst=P2^7; //时钟端口
sbit SELT =P1^6; //选择键
sbit ENTER=P1^7; //确认键
sbit UP =P3^0; //加键
sbit DOWN =P3^1; //减键
sbit MODE =P3^2; //切换按键接口
sbit SWITCH=P3^3; //手动开关
sbit AUTO_LED=P1^3; //自动模式灯接口
sbit HAND_LED=P1^4; //手动灯接口
sbit LAMP1=P3^4; //灯接口
sbit LAMP2=P3^5; //灯接口
sbit LAMP3=P3^6; //灯接口
sbit LAMP4=P3^7; //灯接口
sbit LIGHT1=P2^0; //光线检测端口
sbit IN1=P2^2;
sbit OUT1=P2^1;
sbit DQ=P1^5; //温度数据口
uchar Select_num; //选择按键按下次数
uchar Enter_num; //确认按键按下次数
uchar Switch_num; //手动开关按键按下次数
float Year,Month,Day,Hour,Minute,Second; //时间设置值
uchar Week;
float Hour_H,Minute_H,Second_H; //设置开始时间
float Hour_L,Minute_L,Second_L; //设置结束时间
int Value1; //人数
uchar IN1_flag=0;
uchar OUT1_flag=0;
uint Count; //T0定时器中断计数次数
uchar Miao;
int temperature; //全局变量温度
void read_rtc();
/**************************************************LCD1602显示*******************************************************************/
void delay1(uint z) //延时函数
{
uint x,y;
for(x=z;x>0;x--)
for(y=10;y>0;y--);
}
void write_com(uchar com) //写指令函数
{
rw=0;
delay1(5);
rs=0;
delay1(5);
e=1;
delay1(5);
P0=com;
delay1(5);
e=0;
delay1(5);
}
void write_date(uchar date) //写数据函数
{
rw=0;
delay1(5);
rs=1;
delay1(5);
e=1;
delay1(5);
P0=date;
delay1(5);
e=0;
delay1(5);
}
void init() //初始化函数
{
uchar num;
Year=17;
Month=1;
Day=1;
Hour=15;
Minute=30;
Second=50;
Week=1;
Hour_H=22;
Minute_H=0;
Second_H=0;
Hour_L=18;
Minute_L=0;
Second_L=0;
e=0; // 时序表e初始为0
write_com(0x38); //设置16*2显示，5*7点阵，8位数据接口
write_com(0x0c); //设置光标
write_com(0x06); //光标自动加1,光标输入方式
write_com(0x01); //清屏
write_com(0x80); //设置初始显示位置
for(num=0;num<16;num++)
{
write_date(table1[num]);
delay1(5);
}
write_com(0x80+0x40);
for(num=0;num<16;num++)
{
write_date(table2[num]);
delay1(5);
}
}
void SetTime_dispaly(uchar add,uchar dat) //第一个：参数的地址，第二个：参数的内容
{
uchar shi,ge;
shi=dat/10; //把十位提取出来
ge=dat%10; //把个位提取出来
write_com(add); //要写的地址
write_date(0x30+shi); //十位的内容 1602字符库
write_date(0x30+ge); //个位的内容 1602字符库
}
void Week_dispaly(uchar add,uchar dat) //第一个：参数的地址，第二个：参数的内容
{
write_com(add); //要写的地址
write_date(0x30+dat); //十位的内容 1602字符库
}
void Date_dispaly(uchar add,uchar dat) //第一个：参数的地址，第二个：参数的内容
{
uchar shi,ge;
shi=dat/16; //把十位提取出来
ge=dat%16; //把个位提取出来
write_com(add+3); //要写的地址
write_date(0x30+shi); //十位的内容 1602字符库
write_date(0x30+ge); //个位的内容 1602字符库
}
void LCD_Clean(uchar i) //液晶屏清除显示
{
uchar num;
if(i==1)
{
write_com(0x80); //设置初始显示位置
for(num=0;num<16;num++) //显示第一行内容
{
write_date(table3[num]);
delay1(1);
}
}
if(i==2)
{
write_com(0x80+0x40);
for(num=0;num<16;num++) //显示第二行内容
{
write_date(table3[num]);
delay1(1);
}
}
}
void LCD_Display_String(unsigned char line,unsigned char *string)
{ //液晶屏显示内容，把要显示的内容写到对应的位置
unsigned char i;
unsigned char address=0;
if(line==1)
{
address=0x80; //0X80是第1行的第1个位置 ,0x81第2位
}
else if(line==2)
{
address=0x80+0x40; //0X80+0x40是第2行的第1个位置 ,0X80+0x40+1是第2行第2位
}
for(i=0;i<16;i++)
{
write_com(address);
write_date(string[i]);
address++;
}
}
/**********************************DS1302时钟***************************************/
void Time_Display(void)
{
read_rtc();
Date_dispaly(0x80+0x40+9,time_data[6]); //显示秒
Date_dispaly(0x80+0x40+6,time_data[5]); //显示分
Date_dispaly(0x80+0x40+3,time_data[4]); //显示时
Date_dispaly(0x80+11,time_data[3]); //显示日
Date_dispaly(0x80+8,time_data[2]); //显示月
Week_dispaly(0x80+0x40+15,time_data[1]); //显示周
Date_dispaly(0x80+5,time_data[0]); //显示年
// Year/10*16+Year%10
Hour=time_data[4]/16*10+time_data[4]%16;;
Minute=time_data[5]/16*10+time_data[5]%16;;
Second=time_data[6]/16*10+time_data[6]%16;;
}
void write_ds1302_byte(uchar dat)
{
uchar i;
for(i=0;i<8;i++)
{
sck=0;
io=dat&0x01; //准备数据,从最低位开始
dat=dat>>1;
sck=1;
}
}
void write_ds1302(uchar add,uchar dat)
{
rst=0;
_nop_(); //CPU原地踏步
sck=0;
_nop_();
rst=1;
_nop_();
write_ds1302_byte(add); //传地址
write_ds1302_byte(dat); //传数据
rst=0; //不受其他影响
_nop_();
io=1; //释放
sck=1;
}
uchar read_ds1302(uchar add)
{
uchar i,value;
rst=0;
_nop_(); //CPU原地踏步
sck=0;
_nop_();
rst=1;
_nop_();
write_ds1302_byte(add);
for(i=0;i<8;i++)
{
value=value>>1;
sck=0;
if(io)
value=value|0x80;
sck=1;
}
rst=0;
_nop_();
sck=0;
_nop_();
sck=1;
io=1;
return value;
}
void set_rtc() //设置时间
{
uchar i,j;
for(i=0;i<7;i++) //转换BCD码
{
j=time_data[i]/10;
time_data[i]=time_data[i]%10;
time_data[i]=time_data[i]+j*16;
}
write_ds1302(0x8e,0x00); //去除写保护
for(i=0;i<7;i++)
{
write_ds1302(write_add[i],time_data[i]);
}
write_ds1302(0x8e,0x80); //加写保护
}
void read_rtc()
{
uchar i;
for(i=0;i<7;i++)
{
time_data[i]=read_ds1302(read_add[i]); //最终读出来的数 16进制
}
}
/*************************************************按键****************************************************************/
void Keyscan(void)
{
if(SELT==0)
{
delay1(2);
if(SELT==0)
{
while(!SELT);
Select_num++; //选择键按下一次
Adjust=1; //进入调节模式
}
if(Select_num==1)
{
LCD_Clean(1);
LCD_Clean(2);
LCD_Display_String(1,table4);
LCD_Display_String(2,table5);
write_com(0x80+0); //写 >>
write_date(0x3e);
write_com(0x80+1); //写 >>
write_date(0x3e);
Enter_num=0;
}
if(Select_num==2)
{
LCD_Clean(1);
LCD_Clean(2);
LCD_Display_String(1,table4);
LCD_Display_String(2,table5);
write_com(0x80+0x40+0); //写 >>
write_date(0x3e);
write_com(0x80+0x40+1); //写 >>
write_date(0x3e);
Enter_num=0;
}
if(Select_num==3)
{
LCD_Clean(1);
LCD_Clean(2);
LCD_Display_String(1,table1);
LCD_Display_String(2,table2);
Select_num=0;
Enter_num=0;
Adjust=0;
}
write_com(0x0c); //光标不再闪烁
Enter_num=0;
}
if(ENTER==0)
{
delay1(2);
if(ENTER==0)
{
while(!ENTER);
Enter_num++;
}
if(Select_num==1) //设置实时时间
{
if(Enter_num==1)
{
LCD_Clean(1);
LCD_Clean(2);
LCD_Display_String(1,table9);
LCD_Display_String(2,table0);
SetTime_dispaly(0x80+8,Year);
SetTime_dispaly(0x80+11,Month);
SetTime_dispaly(0x80+14,Day);
SetTime_dispaly(0x80+0x40+6,Hour);
SetTime_dispaly(0x80+0x40+9,Minute);
SetTime_dispaly(0x80+0x40+12,Second);
Week_dispaly(0x80+0x40+15,Week);
write_com(0x80+8); //光标闪烁地址，停留在年的位置上
write_com(0x0f); //光标闪烁
}
if(Enter_num==2)
{
write_com(0x80+11); //光标闪烁地址，停留在月的位置上
write_com(0x0f); //光标闪烁
}
if(Enter_num==3)
{
write_com(0x80+14); //光标闪烁地址，停留在日的位置上
write_com(0x0f); //光标闪烁
}
if(Enter_num==4)
{
write_com(0x80+0x40+6); //光标闪烁地址，停留在时的位置上
write_com(0x0f); //光标闪烁
}
if(Enter_num==5)
{
write_com(0x80+0x40+9); //光标闪烁地址，停留在分的位置上
write_com(0x0f); //光标闪烁
}
if(Enter_num==6)
{
write_com(0x80+0x40+12); //光标闪烁地址，停留在秒的位置上
write_com(0x0f); //光标闪烁
}
if(Enter_num==7)
{
write_com(0x80+0x40+15); //光标闪烁地址，停留在星期的位置上
write_com(0x0f); //光标闪烁
}
if(Enter_num==8)
{
Enter_num=0;
write_com(0x0c); //光标不再闪烁
LCD_Clean(1);
LCD_Clean(2);
LCD_Display_String(1,table1);
LCD_Display_String(2,table2);
time_data[0]=Year;///10*16+Year%10;
time_data[1]=Week;///10*16+Week%10;
time_data[2]=Month;///10*16+Month%10;
time_data[3]=Day;///10*16+Day%10;
time_data[4]=Hour;///10*16+Hour%10;
time_data[5]=Minute;///10*16+Minute%10;
time_data[6]=Second;///10*16+Second%10;
set_rtc(); //设置时间
Select_num=0;
Adjust=0;
}
}
if(Select_num==2) //设置开关锁时间
{
if(Enter_num==1)
{
LCD_Clean(1);
LCD_Clean(2);
LCD_Display_String(1,table6);
LCD_Display_String(2,table7);
SetTime_dispaly(0x80+0x40+4,Hour_L);
SetTime_dispaly(0x80+0x40+7,Minute_L);
SetTime_dispaly(0x80+0x40+10,Second_L);
write_com(0x80+0x40+4); //光标闪烁地址，停留在时的位置上
write_com(0x0f); //光标闪烁
}
if(Enter_num==2)
{
write_com(0x80+0x40+7); //光标闪烁地址，停留在分的位置上
write_com(0x0f); //光标闪烁
}
if(Enter_num==3)
{
write_com(0x80+0x40+10); //光标闪烁地址，停留在秒的位置上
write_com(0x0f); //光标闪烁
}
if(Enter_num==4)
{
write_com(0x0c); //光标不再闪烁
LCD_Clean(1);
LCD_Clean(2);
LCD_Display_String(1,table8);
LCD_Display_String(2,table7);
SetTime_dispaly(0x80+0x40+4,Hour_H);
SetTime_dispaly(0x80+0x40+7,Minute_H);
SetTime_dispaly(0x80+0x40+10,Second_H);
write_com(0x80+0x40+4); //光标闪烁地址，停留在时的位置上
write_com(0x0f); //光标闪烁
}
if(Enter_num==5)
{
write_com(0x80+0x40+7); //光标闪烁地址，停留在分的位置上
write_com(0x0f); //光标闪烁
}
if(Enter_num==6)
{
write_com(0x80+0x40+10); //光标闪烁地址，停留在秒的位置上
write_com(0x0f); //光标闪烁
}
if(Enter_num==7)
{
Enter_num=0;
write_com(0x0c); //光标不再闪烁
LCD_Clean(1);
LCD_Clean(2);
LCD_Display_String(1,table1);
LCD_Display_String(2,table2);
Select_num=0;
Adjust=0;
}
}
}
if(UP==0)
{
delay1(2);
if(UP==0)
{
while(!UP);
if(Select_num==1)
{
if(Enter_num==1)
{
Year++;
if(Year>99)
Year=0;
SetTime_dispaly(0x80+8,Year);
write_com(0x80+8);
write_com(0x0f);
}
if(Enter_num==2)
{
Month++;
if(Month>12)
Month=1;
SetTime_dispaly(0x80+11,Month);
write_com(0x80+11);
write_com(0x0f);
}
if(Enter_num==3)
{
Day++;
if(Day>31)
Day=1;
SetTime_dispaly(0x80+14,Day);
write_com(0x80+14);
write_com(0x0f);
}
if(Enter_num==4)
{
Hour++;
if(Hour>23)
Hour=0;
SetTime_dispaly(0x80+0x40+6,Hour);
write_com(0x80+0x40+6);
write_com(0x0f);
}
if(Enter_num==5)
{
Minute++;
if(Minute>59)
Minute=0;
SetTime_dispaly(0x80+0x40+9,Minute);
write_com(0x80+0x40+9);
write_com(0x0f);
}
if(Enter_num==6)
{
Second++;
if(Second>59)
Second=0;
SetTime_dispaly(0x80+0x40+12,Second);
write_com(0x80+0x40+12);
write_com(0x0f);
}
if(Enter_num==7)
{
Week++;
if(Week>7)
Week=1;
Week_dispaly(0x80+0x40+15,Week);
write_com(0x80+0x40+15);
write_com(0x0f);
}
}
if(Select_num==2)
{
if(Enter_num==1)
{
Hour_L++;
if(Hour_L>23)
Hour_L=0;
SetTime_dispaly(0x80+0x40+4,Hour_L);
write_com(0x80+0x40+4);
write_com(0x0f);
}
if(Enter_num==2)
{
Minute_L++;
if(Minute_L>59)
Minute_L=0;
SetTime_dispaly(0x80+0x40+7,Minute_L);
write_com(0x80+0x40+7);
write_com(0x0f);
}
if(Enter_num==3)
{
Second_L++;
if(Second_L>59)
Second_L=0;
SetTime_dispaly(0x80+0x40+10,Second_L);
write_com(0x80+0x40+10);
write_com(0x0f);
}
if(Enter_num==4)
{
Hour_H++;
if(Hour_H>23)
Hour_H=0;
SetTime_dispaly(0x80+0x40+4,Hour_H);
write_com(0x80+0x40+4);
write_com(0x0f);
}
if(Enter_num==5)
{
Minute_H++;
if(Minute_H>59)
Minute_H=0;
SetTime_dispaly(0x80+0x40+7,Minute_H);
write_com(0x80+0x40+7);
write_com(0x0f);
}
if(Enter_num==6)
{
Second_H++;
if(Second_H>59)
Second_H=0;
SetTime_dispaly(0x80+0x40+10,Second_H);
write_com(0x80+0x40+10);
write_com(0x0f);
}
}
}
}
if(DOWN==0)
{
delay1(2);
if(DOWN==0)
{
while(!DOWN);
if(Select_num==1)
{
if(Enter_num==1)
{
Year--;
if(Year<0)
Year=99;
SetTime_dispaly(0x80+8,Year);
write_com(0x80+8);
write_com(0x0f);
}
if(Enter_num==2)
{
Month--;
if(Month<1)
Month=12;
SetTime_dispaly(0x80+11,Month);
write_com(0x80+11);
write_com(0x0f);
}
if(Enter_num==3)
{
Day--;
if(Day<1)
Day=31;
SetTime_dispaly(0x80+14,Day);
write_com(0x80+14);
write_com(0x0f);
}
if(Enter_num==4)
{
Hour--;
if(Hour<0)
Hour=23;
SetTime_dispaly(0x80+0x40+6,Hour);
write_com(0x80+0x40+6);
write_com(0x0f);
}
if(Enter_num==5)
{
Minute--;
if(Minute<0)
Minute=59;
SetTime_dispaly(0x80+0x40+9,Minute);
write_com(0x80+0x40+9);
write_com(0x0f);
}
if(Enter_num==6)
{
Second--;
if(Second<0)
Second=59;
SetTime_dispaly(0x80+0x40+12,Second);
write_com(0x80+0x40+12);
write_com(0x0f);
}
if(Enter_num==7)
{
Week--;
if(Week<1)
Week=7;
Week_dispaly(0x80+0x40+15,Week);
write_com(0x80+0x40+15);
write_com(0x0f);
}
}
if(Select_num==2)
{
if(Enter_num==1)
{
Hour_L--;
if(Hour_L<0)
Hour_L=23;
SetTime_dispaly(0x80+0x40+4,Hour_L);
write_com(0x80+0x40+4);
write_com(0x0f);
}
if(Enter_num==2)
{
Minute_L--;
if(Minute_L<0)
Minute_L=59;
SetTime_dispaly(0x80+0x40+7,Minute_L);
write_com(0x80+0x40+7);
write_com(0x0f);
}
if(Enter_num==3)
{
Second_L--;
if(Second_L<0)
Second_L=59;
SetTime_dispaly(0x80+0x40+10,Second_L);
write_com(0x80+0x40+10);
write_com(0x0f);
}
if(Enter_num==4)
{
Hour_H--;
if(Hour_H<0)
Hour_H=23;
SetTime_dispaly(0x80+0x40+4,Hour_H);
write_com(0x80+0x40+4);
write_com(0x0f);
}
if(Enter_num==5)
{
Minute_H--;
if(Minute_H<0)
Minute_H=59;
SetTime_dispaly(0x80+0x40+7,Minute_H);
write_com(0x80+0x40+7);
write_com(0x0f);
}
if(Enter_num==6)
{
Second_H--;
if(Second_H<0)
Second_H=59;
SetTime_dispaly(0x80+0x40+10,Second_H);
write_com(0x80+0x40+10);
write_com(0x0f);
}
}
}
}
if(MODE==0) //切换按键按下
{
delay1(2); //消抖
if(MODE==0)
{
while(!MODE); //按键释放
Auto_flg=~Auto_flg; //模式切换
if(Auto_flg==0) //自动模式
{
AUTO_LED=0; //自动灯亮
HAND_LED=1;
}
if(Auto_flg==1) //手动模式
{
AUTO_LED=1;
HAND_LED=0; //手动灯亮
LAMP1=1; //关灯
LAMP2=1;
LAMP3=1;
LAMP4=1;
}
}
}
if(Auto_flg==1) //手动模式
{
if(SWITCH==0) //灯开关按键按下
{
delay1(2); //消抖
if(SWITCH==0)
{
while(!SWITCH); //按键释放
Switch_num++; //按下次数增加
if(Switch_num==1) //按下一次，开一盏灯
{
LAMP1=0;
LAMP2=1;
LAMP3=1;
LAMP4=1;
}
if(Switch_num==2) //按下二次，开二盏灯
{
LAMP1=0;
LAMP2=0;
LAMP3=1;
LAMP4=1;
}
if(Switch_num==3) //按下3次，开3盏灯
{
LAMP1=0;
LAMP2=0;
LAMP3=0;
LAMP4=1;
}
if(Switch_num==4) //按下4次，开4盏灯
{
LAMP1=0;
LAMP2=0;
LAMP3=0;
LAMP4=0;
}
if(Switch_num==5) //按下5次，开0盏灯
{
LAMP1=1;
LAMP2=1;
LAMP3=1;
LAMP4=1;
Switch_num=0; //次数清除
}
}
}
}
}
void Open(void)
{
float Now;
float Set_L,Set_H;
Now=Hour+Minute/60+Second/3600; //把实时时间化成小时为单位
Set_L=Hour_L+Minute_L/60+Second_L/3600; //把设置下限时间化成小时为单位
Set_H=Hour_H+Minute_H/60+Second_H/3600; //把设置上限时间化成小时为单位
if(Auto_flg==0) //自动模式
{
if((Now>=Set_L)&(Now<=Set_H)) //实时时间在上下限时间范围内
{
if(LIGHT1==0) //光线不足
{
if(Value1==0)
{
LAMP1=1; //全灭
LAMP2=1;
LAMP3=1;
LAMP4=1;
}
if((Value1>0)&(Value1<10))
{
LAMP1=0; //亮一个灯
LAMP2=1;
LAMP3=1;
LAMP4=1;
}
if((Value1>=10)&(Value1<20))
{
LAMP1=0; //亮二个灯
LAMP2=0;
LAMP3=1;
LAMP4=1;
}
if((Value1>=20)&(Value1<30))
{
LAMP1=0; //亮三个灯
LAMP2=0;
LAMP3=0;
LAMP4=1;
}
if(Value1>=30)
{
LAMP1=0; //亮四个灯
LAMP2=0;
LAMP3=0;
LAMP4=0;
}
}
if(LIGHT1==1) //光线强烈
{
LAMP1=1; //全灭
LAMP2=1;
LAMP3=1;
LAMP4=1;
}
}
if((Now<Set_L)|(Now>Set_H)) //实时时间不在范围内
{
LAMP1=1; //全灭
LAMP2=1;
LAMP3=1;
LAMP4=1;
}
}
}
/*******************************************************************************************************/
void Count_Value(void)
{
SetTime_dispaly(0x80+3,Value1);
if(IN1==0)
{
delay1(1);
if(IN1==0)
{
while(!IN1);
if(OUT1_flag==0)
{
IN1_flag=1;
TR0=1; //开启定时器防止误触发
}
if(OUT1_flag==1)
{
Value1++; //人数增加
if(Value1>=99) //如果人数计数到99，变为最大99
Value1=99;
OUT1_flag=0; //清零
IN1_flag=0;
TR0=0; //关闭定时器
Count=0;
Miao=0;
}
}
}
if(OUT1==0)
{
delay1(1);
if(OUT1==0)
{
while(!OUT1);
if(IN1_flag==0)
{
OUT1_flag=1;
TR0=1; //开启定时器防止误触发
}
if(IN1_flag==1)
{
Value1--; //人数减少
if(Value1<0) //如果人数计数小于0，变为最小0
Value1=0;
IN1_flag=0; //清零
OUT1_flag=0;
TR0=0; //关闭定时器
Count=0;
Miao=0;
}
}
}
}
/****************************************温度************************************************************/
/*void delay(uint y) //DS18B20延时函数（仿真用）
{
while(y--);
}
*/
void delay(uint z) //DS18B20延时函数（实物用）
{
uint x,y;
for(x=z;x>0;x--)
for(y=1;y>0;y--);
}
void write_byte(uint dat) //写一个字节
{
uchar i;
for(i=0;i<8;i++) //循环八次共有八位
{
DQ=0; //写零
DQ=dat&0x01; //向总线写位数据，从最低位写起
delay(4);
DQ=1; //写一
dat>>=1; //下次写作准备，移位数据
}
delay(4);
}
uchar read_byte(void) //读一个字节，返回值
{
uchar i;
uint value;
for(i=0;i<8;i++) //循环八次共有八位
{
DQ=0;
value>>=1;
DQ=1; //释放总线
if(DQ)
value|=0x80; //DQ=1，value取1
delay(4);
}
return value;
}
void ds18b20_init() //初始化函数
{
uint n;
DQ=1;
delay(8);
DQ=0;
delay(80); //低电平480——960us
DQ=1; //总线释放
delay(8); //等待50——100us
n=DQ; //读取复位状态
delay(4);
}
int readtemperature() //读整数部分
{
int a,b; //高八位，低八位
ds18b20_init();
write_byte(0xcc); //跳过rom匹配，跳过读序列号的操作，可节省操作时间
write_byte(0x44); //启动温度检测
delay(300); //测温度
ds18b20_init(); //开始操作前需要复位
write_byte(0xcc); //跳过rom匹配
write_byte(0xbe); //写读寄存器中温度值的命令
a=read_byte(); //low 低位开始读取
b=read_byte(); //high 高位开始读取
b<<=8; //把高位左移八位
b=b|a; //高八位与第八位进行或运算，得到总和
if(b>=0) //如果温度大于等于0
{
b=b*0.0625; //直接乘以0.0625
write_com(0x80+0x40+2); //在LCD1602对应的位置不写内容
write_date(0x20);
}
else //温度小于0
{
b=~b+1; //取反码再加一
b=b*0.0625; //再运算
write_com(0x80+0x40+2); //在LCD1602对应的位置写一个负号
write_date(0x2d);
}
return b; //返回b，此时以表示温度
}
void temperature_dispaly(char add,char dat) //温度显示函数：第一个：参数的地址，第二个：参数的内容
{
uchar shi,ge;
shi=dat/10; //把温度的十位提取出来
ge=dat%10; //把温度的个位提取出来
write_com(0x80+0x40+add); //要写的地址
write_date(0x30+shi); //十位的内容 1602字符库
write_date(0x30+ge); //个位的内容 1602字符库
}
/*****************************************定时器初始化和主函数***********************************************************/
void T0_init(void)
{
TMOD=0x11; //设置定时器0为工作方式1
TH0=(65536-50000)/256; //50MS定时
TL0=(65536-50000)%256;
EA=1; //开定时器T0的中断总中断
ET0=1; //允许T0中断
// TR0=1; //开启定时器
}
void main()
{
AUTO_LED=0; //默认自动模式
temperature=readtemperature();
init(); //液晶初始化
T0_init(); //定时器初始化
delay1(8000);
while(1)
{
if(Adjust==0) //非调节模式下显示时间人数和温度
{
temperature=readtemperature(); //读取温度
temperature_dispaly(3,temperature); //显示温度
Time_Display(); //显示时间
Open(); //动作判断,根据光线和声响开关
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