要求：1、通過硬件電路設計和軟件編程驅動的結合方式，實現0℃～99℃范圍內的溫度智能監測。
? ? ? ? ? ? ? 2．可通過LCD實時顯示實際溫度和預設溫度。
? ? ? ? ? ? ? 3．當溫度超出預設范圍時及時報警。

? ? ? ? ? ? ? 4. 報警聲用電子樂曲或音樂音符實現（選做）。

#include<reg51.h> #include<intrins.h> #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;uchar code DSY_CODE[]= { 0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x00};uchar code df_Table[]= {0,1,1,2,3,3,4,4,5,6,6,7,8,8,9,9};char Alarm_Temp_HL[2]={0,99};uchar CurrentT = 0; uchar Temp_Value[]= {0x00,0x00}; uchar Dispaly_Digit[] = {0,0,0,0}; bit HI_Alarm = 0,LO_Alarm = 0; bit DS18B20_IS_OK = 1; uint Time0_Count = 0 ;void delay (uint x) {while(--x); }uchar Init_DS18B20() { uchar status;DQ = 1;delay(8);DQ = 0;delay(90);DQ = 1;delay(8);status = DQ;delay(100);DQ = 1;return status; }uchar ReadOneByte() {uchar i,dat = 0;DQ = 1;_nop_();for(i = 0 ; i < 8 ; i++){DQ = 0;dat >>= 1;DQ = 1;_nop_();_nop_();if(DQ)dat |= 0x80;delay(30);DQ = 1;}return dat; }void WriteOneByte(uchar dat) {uchar i;for(i = 0 ; i < 8 ; i++){DQ = 0;DQ = dat & 0x01;delay(5);DQ =1;dat >>=1;} }void Read_Temperature() {if(Init_DS18B20() == 1){DS18B20_IS_OK = 0;}else{WriteOneByte(0xcc);WriteOneByte(0x44);Init_DS18B20();WriteOneByte(0xcc);WriteOneByte(0xbe);Temp_Value[0]= ReadOneByte();Temp_Value[1] = ReadOneByte();//Alarm_Temp_HL[0] = ReadOneByte();//Alarm_Temp_HL[1] = ReadOneByte();DS18B20_IS_OK = 1;} }void Set_Alarm_Temp_Value() {Init_DS18B20();WriteOneByte(0xcc);WriteOneByte(0x4e);//WriteOneByte(Alarm_Temp_HL[0]);//WriteOneByte(Alarm_Temp_HL[1]);WriteOneByte(0x7f);Init_DS18B20();WriteOneByte(0xcc);WriteOneByte(0x48); }void Display_T() {uchar i;uchar t = 150;uchar ng = 0,np = 0;char Signed_Current_Temp;if((Temp_Value[1] & 0xf8) == 0xf8){Temp_Value[1] = ~Temp_Value[1];Temp_Value[0] = Temp_Value[0] +1;if(Temp_Value[0] == 0x00)Temp_Value[1]++;ng = 1;np = 0xfd;}//Dispaly_Digit[0] = df_Table[Temp_Value[0]&0x0f];CurrentT = ((Temp_Value[0] & 0xf0)>>4 ) |((Temp_Value[1] & 0x07) <<4);Signed_Current_Temp = ng ? - CurrentT : CurrentT;if(Signed_Current_Temp >= Alarm_Temp_HL[0])HI_Alarm = 0;else HI_Alarm = 1;if(Signed_Current_Temp <= Alarm_Temp_HL[1])LO_Alarm = 0;else LO_Alarm = 1;Dispaly_Digit[3] = CurrentT / 100;Dispaly_Digit[2] = ( CurrentT % 100 ) / 10;Dispaly_Digit[1] = CurrentT %10;for(i = 0 ; i < 30 ; i++){P0 = 0x39; P2 = 0x7f; delay(t); P2 = 0xff;//cP0 = 0x63 ; P2 = 0xbf; delay(t) ; P2 = 0xff;//。\P0 = DSY_CODE[Dispaly_Digit[1]] ; P2 = 0xdf;//顯示個位delay(t);P2 = 0xff;P0 = DSY_CODE[Dispaly_Digit[2]]; P2 = 0xef;//顯示十位delay(t);P2 = 0xff;if(Dispaly_Digit[3] != 0 ){P0 = DSY_CODE[Dispaly_Digit[3]]; P2 = 0xf7;//顯示百位delay(t);P2 = 0xff;}} }void T0_Int() interrupt 1 {TH0 = -1000 / 256;TL0 = -1000 % 256;BEEP = !BEEP;if( ++Time0_Count == 400){Time0_Count = 0;if(HI_Alarm)HI_LED = ~HI_LED ;else HI_LED = 1;if(LO_Alarm)LO_LED = ~LO_LED;else LO_LED = 1;} }void main(void) {IE = 0X82;TMOD= 0X01;TH0 = -1000 / 256;TL0 = -1000 % 256;TR0 = 0;HI_LED = 1;LO_LED = 1;Set_Alarm_Temp_Value();Read_Temperature();delay(50000);delay(50000);while(1){Read_Temperature();if(DS18B20_IS_OK){ if(HI_Alarm == 1 || LO_Alarm == 1)TR0 = 1;else TR0 = 0;BEEP = 0;DisPlay_T();}else{P0 = P2 = 0x00;}} }

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