用数码管与DS18B20设计温度报警器

#include#include#define uchar unsigned char#define uint unsigned intsbit dq=P3 6；sbit BEEP=P3 7；sbit hi _ led=P1 4；sbit lo _ led=P1 5；Bit HI_Alarm=0，LO _ Alarm=0；bit ds 18 b20 _ IS _ OK=1；Uchar code dsy _ code =0x3f，0x06，0xx5b，0x4f，0x66，0x6d，0x7d，0x07，0x7f，0x6f/数码管常用阴极段代码Uchar code df _ table =0，1，1，2，3，3，4，4，5，6，6，7，8，8，9，9/温度小数点比较表uchar current=0；/温度整数部分Uchardisplay _ digit =0，0，0 ；/数码管要显示的温度Uchar Temp_Value=0x00，0x 00 ；/DS0832读取的温度值Uint Time0 _ Count=0/计时器中断数Char Alarm_Temp_HL2=70，-20 ；/* * * * * * * * *计划延迟* * * * * * * * * * * * * * * */Void Delay(uint x)while(-x)；/* * * * * * * *初始化ds 18 b20 * * * * * * * * * * */Uchar Init_DS18B20()Uchar statusDQ=1；delay(8)；DQ=0；delay(90)；DQ=1；delay(8)；Status=DQdelay(100)；DQ=1；Return status/* * * * * * * * ds18b 20读字节* * * * * * * * * */Uchar ReadOneByte()Uchar i，dat=0；DQ=1；_ nop _()；for(I=0)；i8；I)DQ=0；dat=1；DQ=1；_ nop _()；_ nop _()；if(DQ)dat |=0x 80；delay(30)；DQ=1；Return dat/* * * * * * * * ds18b 20写字节* * * * * * * * * */Void WriteOneByte(uchar dat)uchar I；for(I=0)；i8；I)DQ=0；DQ=dat0x01delay(5)；DQ=1；dat=1；/* * * * * * * * *从DS18B20读取温度* * * * * * * * * * */Void Read_Temperature()if(Init _ ds 18 b20()=1)ds 18 b20 _ IS _ OK=0；ElseWriteOneByte(0x cc)；WriteOneByte(0x44)；init _ ds 18 b20()；WriteOneByte(0x cc)；WriteOneByte(0x be)；temp _ Value0=readone byte()；temp _ Value1=ReadOneByte()；ds 18 b20 _ IS _ OK=1；/* * * * * * * * * *设置DS18B20的预警值* * * * * * * * * */Void Set_Alarm_Temp_Value()init _ ds 18 b20()；WriteOneByte(0x cc)；/跳过序列号WriteOneByte(0x4e)；/将设置的温度警报值写入DS18B20WriteOneByte(Alarm _ Temp _ HL0)；/写入THWriteOneByte(Alarm _ Temp _ HL1)；/TL写入WriteOneByte(0x7f)；/12位精度init _ ds 18 b20()；WriteOneByte(0x cc)；/跳过序列号WriteOneByte(0x 48)；/将温度警报值存储在DS18B20中/* * * * * * * * * * * * * * * * * * * * * * * * * * * * *Void Display_Temperature() /显示温度uchar I；Uchar t=150/延迟值Uchar ng=0，NP=0；/负数标签和负号显示位置Char Signed _ Current _ Temp如果if(temp _ value10x F8)=0x F8)/负值，则反向添加1。设定负数标示和负数符号显示位置Temp _ Value1= Temp _ Value1；Temp _ Value0= Temp _ Value01；if(temp _ value0=0x 00)temp _ value1；ng=1；Np=0xfddisplay _ digit0=df _ tabletemp _ value00x0f；/代码表显示温度小数位数current=(temp _ value00x 0)4)|(temp _ value10x 07)4)；Signed_Current_Temp=ng？-current : currentt；hi _ alarm=signed _ current _ temp=alarm _ temp _ HL0？1:0；lo _ alarm=signed _ current _ temp=alarm _ temp _ HL1？1:0；display _ digit3=current/100；display _ digit2=current 0/10；display _ digit1=current；If(Display_Digit3=0) /高值为0，不现实，负号在后面移动 Display _ Digit3=10；Np=0xfbIf(Display_Digit2=0)display _ Digit2=10；Np=0xf7for(I=0)；I30I )/显示数码管刷新温度值P0=0X39P2=0X7Fdelay(t)；P2=0XFFP0=0X63P2=0XBFdelay(t)；P2=0XFFP0=DSY _ CODEDisplay _ Digit0；P2=0XDFdelay(t)；P2=0XFFP0=(dsy _ codedisplay _ digit1)|0x 80；P2=0XEFdelay(t)；P2=0XFFP0=DSY _ CODEDisplay _ Digit2；P2=0XF7delay(t)；P2=0XFFP0=DSY _ CODEDisplay _ Digit3；P2=0XFBdelay(t)；P2=0XFFIf(ng) P0=0X40P2=npdelay(t)；P2=0XFF/* * * * * * * * * * * *计时器0中断，控制报警声* * * * * * * * * * * */Void T0_INT()interrupt 1TH0=-1000/256；TL0=-1000% 6；非=！BEEPIf(Time0_Count=400)Time0 _ Count=0if(HI _ Alarm)HI _ LED= HI _ LED；else HI _ LED=1；if(LO _ Alarm)LO _ LED= LO _ LED；else LO _ LED=1；Void main()IE=0X82TMOD=0X01/方法1计数TH0=-1000/256；TL0=-1000% 6；TR0=0；HI _ LED=1；LO _ LED=1；set _ Alarm _ Temp _ Value()；read _ Temp