温度控制系统DS18B20+控制报警

#include<reg52.h> #define uchar unsigned char #define uint unsigned int char sj,a=0,b=0,c,d; uchar flag,count; uchar Temp_value2; uchar TempBufferTH[7],TempBufferTL[7],Temp_Buffer[9]; sbit k1 =P2^1; sbit k2 =P2^2; sbit k3 =P2^3; sbit k4 =P2^4; sbit DQ =P2^5; sbit spk =P3^4; sbit relay =P2^0; //sbit gx =P2^7; sbit RS =P3^5; sbit RW =P3^6; sbit EN =P3^7; sfr DBPort =0x80; uchar code str1[]=" "; //可以省略，但相应位置必须清屏 uchar code str2[]="RESET ALERT CODE "; uchar code str3[]="LOOK ALERT CODE "; uchar code str4[]="TH: "; uchar code str7[]="TL: "; uchar code str5[]=">H "; uchar code str6[]="<L "; uchar code str9[]="DS18B20 OK "; uchar code str10[]="TEMP: "; uchar code str11[]="DS18B20 ERROR "; uchar code str12[]="TEMP: ^_^||| "; void delay(uchar z) //1ms*Z延时函数 { uchar i,j; for(i=z;i>0;i--) for(j=120;j>0;j--) {;} } void SPK_BZ() //声响函数 { uchar i,j,k; for(k=0;k<1;k++) { for(i=0;i<160;i++) { spk=~spk; for(j=0;j<100;j++); } delay(200); } } ///////////////////////////////////////////////////////// void delay_18B20(unsigned int i) //（i/100）延时函数 { while(i--); } init_Ds18b20(void) { flag=0; DQ = 1; //DQ复位 delay_18B20(8); //稍做延时 DQ = 0; //单片机将DQ拉低 delay_18B20(80); //精确延时 大于 480us DQ = 1; //拉高总线 delay_18B20(14); flag=DQ; //稍做延时后 如果flag=0则初始化成功 flag=1则初始化失败 delay_18B20(20); DQ =1; return flag; } void Write_Ds18b20(uchar dat) //写 { unsigned char i=0; for (i=8; i>0; i--) { DQ = 0; DQ = dat&0x01; delay_18B20(5); DQ = 1; dat>>=1; } } unsigned char Read_18b20() // 读 { uchar i=0; uchar dat = 0; for (i=8;i>0;i--) { DQ = 0; dat>>=1; DQ = 1; if(DQ) dat|=0x80; delay_18B20(4); } return(dat); } ///////////////////////////LCD1602(20*2)///////////////////////////////////////////////////////// void WR_COMM(uchar c) //写命令 {delay(100); EN=0; RS=0; RW=0; EN=1; P0=c; delay(10); } void WR_DATA(uchar c) //写数据 {delay(100); EN=0; RS=1; RW=0; EN=1; P0=c; delay(10); } unsigned char LCD_Wait() { RS=0; RW=1; delay(1); EN=1; delay(1); EN=0; return DBPort; } void LCD_Write(bit style, unsigned char input) { EN=0; RS=style; RW=0; delay(1); DBPort=input; delay(1);//注意顺序 EN=1; delay(1);//注意顺序 EN=0; delay(1); LCD_Wait(); } void ShowChar(uchar pos,uchar c) { uchar p; if(pos<0x14) p=pos+0x80; else p=pos+0xac; WR_COMM(p); WR_DATA(c); } void ShowString(uchar line,uchar*prt) { uchar L,i; L=line*0x14; for(i=0;i<20;i++) {ShowChar(L++,*(prt+i)); } } void Goto(unsigned char x, unsigned char y) { if(y==0) LCD_Write(0,0x80|x); if(y==1) LCD_Write(0,0x80|(x-0x40)); } void Print(unsigned char *str) { while(*str!='\0') { LCD_Write(1,*str); str++; } } void MEU_ERROR() { ShowString(0,str11); Goto(0,1); Print(str12); } void init_Lcd(void) //LCD初始化 { WR_COMM(0x38); delay(5); WR_COMM(0x38); delay(5); WR_COMM(0x0c); delay(5); WR_COMM(0x01); delay(5); WR_COMM(0x80); } ////////////////////////////////////////////////////////////////// void RE_TEMP() //读取温度值，报警值 { init_Ds18b20(); Write_Ds18b20(0xcc); Write_Ds18b20(0x44); delay_18B20(100); init_Ds18b20(); Write_Ds18b20(0xcc); Write_Ds18b20(0xbe); delay_18B20(100); a=Read_18b20();//温度低8位 b=Read_18b20();//温度高8位 Temp_value2=b<<=8; Temp_value2|=a; Temp_value2*=0.0625; // DS18B20 0.0625最小刻度 Temp_value2=Temp_value2*10; //四舍五入 sj=Temp_value2/10; } void Temptostr() { Temp_Buffer[0]=Temp_value2/10+'0'; //0的ASCll 为 48 Temp_Buffer[1]=Temp_value2/10%10+'0'; Temp_Buffer[2]='.'; //实时温度 Temp_Buffer[3]=Temp_value2%10+'0'; Temp_Buffer[4]=0xdf; Temp_Buffer[5]='C'; Temp_Buffer[6]='\0'; } void TempTHtostr() { TempBufferTH[0]=c/100+'0'; TempBufferTH[1]=c%100/10+'0'; TempBufferTH[2]=c%10+'0'; TempBufferTH[3]=0xdf; TempBufferTH[4]='C'; TempBufferTH[5]='\0'; } void TempTLtostr() { TempBufferTL[0]=d/100+'0'; TempBufferTL[1]=d%100/10+'0'; TempBufferTL[2]=d%10+'0'; TempBufferTL[3]=0xdf; TempBufferTL[4]='C'; TempBufferTL[5]='\0'; } void LOOK_ALARM() //查看报警温度函数 { TempTHtostr(); TempTLtostr(); ShowString(0,str3); Goto(0,1); Print(str4); Goto(10,1); Print(str7); Goto(3,1); Print(TempBufferTH); Goto(13,1); Print(TempBufferTL); delay(20); } void RESET_ALARM() //设置报警值 { TempTHtostr(); TempTLtostr(); ShowString(0,str2); Goto(0,1); Print(str4); Goto(10,1); Print(str7); Goto(3,1); Print(TempBufferTH); Goto(13,1); Print(TempBufferTL); delay(20); } void MEU_OK() //OK { RE_TEMP(); Temptostr(); ShowString(0,str9); Goto(0,1); Print(str10); Goto(5,1); Print(Temp_Buffer); delay(20); } void KEY_VALUE() //k1 { uchar cn=4; while(cn--) { if(k1==0) { delay(10); if(k1==0) { SPK_BZ(); count++; if(count>4) {count=0;} } while(k1==0); } } if(k4!=1) { count=0; SPK_BZ(); } } void GN() //功能键 { KEY_VALUE(); switch(count) { case 0: { WR_COMM(0x01); MEU_OK(); if(sj>c) { Goto(12,1); Print(str5); relay=1; while(k1!=0) { SPK_BZ();} } else { if(sj<d) { Goto(12,1); Print(str6); relay=0; while(k1!=0) {SPK_BZ();} } else { Goto(12,1); Print("^_^"); } while(k1!=0); } } break; case 1: { WR_COMM(0x01); LOOK_ALARM(); while(k4!=0&&k1!=0); } break; case 2: { WR_COMM(0x01); RESET_ALARM(); while(k4!=0&&k1!=0); } break; case 3: //调TH { if(k2==0) { delay(10); if(k2==0) { SPK_BZ(); c++; if(c>128) { c=-5;} RESET_ALARM(); } while(k2==0) { SPK_BZ(); c++; if(c>128) { c=-5;} RESET_ALARM(); } } else if(k3==0) { delay(10); if(k3==0) { SPK_BZ(); c--; if(c<-5) { c=128;} RESET_ALARM(); } while(k3==0) { SPK_BZ(); c--; if(c<-5) { c=128;} RESET_ALARM(); } } }break; case 4: //调TL { if(k2==0) { delay(10); if(k2==0) { SPK_BZ(); d++; if(d>128) { d=-5;} RESET_ALARM(); } while(k2==0) { SPK_BZ(); d++; if(d>128) { d=-5;} RESET_ALARM(); } } if(k3==0) { delay(10); if(k3==0) { SPK_BZ(); d--; if(d<-5) { d=128;} RESET_ALARM(); } while(k3==0) { SPK_BZ(); d--; if(d<-5) { d=128;} RESET_ALARM();