ds18b20多路溫度采集程序(共24頁)

1、本程序為ds18b20的多路溫度采集程序，是我自己參考其他程序后改寫而成，可顯示4路正負溫度值，并有上下限溫度報警（聲音、燈光報警）。親測，更改端口即可使用。（主要器件：51單片機，ds18b20，lcd顯示器）附有proteus仿真圖，及序列號采集程序/*上限62度 下限-20度*/#include#define uchar unsigned char#define uint unsigned intsbit ds=P11;sbit rs=P14;sbit e=P16;sbit sp=P10;sbit d1=P12;sbit d2=P13;uchar lcdrom48=0x28,0x30,0

2、xc5,0xb8,0x00,0x00,0x00,0x8e, 0x28,0x31,0xc5,0xb8,0x00,0x00,0x00,0xb9, 0x28,0x32,0xc5,0xb8,0x00,0x00,0x00,0xe0, 0x28,0x33,0xc5,0xb8,0x00,0x00,0x00,0xd7;unsigned char code table0=TEMPERARTURE:U ;unsigned char code table1=0123456789ABCDEF;int f4;int tvalue;float ftvalue;uint warnl=320;uint warnh=992;/

3、*lcd程序*/void delayms(uint ms)/延時uint i,j;for(i=ms;i0;i-)for(j=110;j0;j-);void wrcom(uchar com)/寫指令delayms(1);rs=0;P3=com;delayms(1);e=1;delayms(1);e=0;void wrdat(uchar dat)/寫數(shù)據(jù)rs=1;e=0;P3=dat;delayms(5);e=1;delayms(5);e=0;void lcdinit()/初始化lcddelayms(15);wrcom(0x38);delayms(5);wrcom(0x0c);delayms(5)

4、;wrcom(0x06);delayms(5);wrcom(0x01);delayms(5);void display(uchar *p)/顯示while(*p!=0)wrdat(*p);p+;delayms(1);displayinit()/初始化顯示lcdinit();wrcom(0x80);display(table0);/*ds18b20程序*/void dsrst()/ds18b20復位uint i;ds=0;i=103;while(i0)i-;ds=1;i=4;while(i0)i-;bit dsrd0()/讀一位數(shù)據(jù)uint i;bit dat;ds=0;i+;ds=1;i+;i

5、+;dat=ds;i=8;while(i0)i-;return(dat);uchar dsrd()/讀1個字節(jié)數(shù)據(jù)uchar i,j,dat;dat=0;for(i=8;i0;i-)j=dsrd0();dat=(j1);return(dat);void dswr(uchar dat)/寫數(shù)據(jù)uint i;uchar j;bit testb;for(j=8;j0;j-)testb=dat&0x01;dat=dat1;if(testb)ds=0;i+;i+;ds=1;i=8;while(i0)i-;elseds=0;i=8;while(i0)i-;ds=1;i+;i+;void tmstart()

6、/初始化ds18b20sp=1;d1=1;d2=1;dsrst();delayms(1);dswr(0xcc);dswr(0x44);void read_dealtemp()/讀取并處理溫度uchar i,j,t;uchar a,b;for(j=0;j4;j+)dsrst();delayms(1);dswr(0x55);for(i=0;i8;i+)dswr(lcdromji);/發(fā)送64位序列號dswr(0xbe);a=dsrd();b=dsrd();tvalue=b;tvalue=8;tvalue=tvalue|a;if(tvaluewarnl)d2=0;sp=0;elsed2=1;sp=1

7、;elsed2=1;wrcom(0xc0);wrdat( );if(tvaluewarnh)d1=0;sp=0;elsed1=1;sp=1;if(j=0)wrcom(0x8e); wrdat(2);if(j=1)wrcom(0x8e);wrdat(3);if(j=2)wrcom(0x8e); wrdat(4);if(j=3)wrcom(0x8e); wrdat(5);ftvalue=tvalue*0.0625;tvalue=ftvalue*10+0.5;ftvalue=ftvalue+0.05;fj=tvalue;/溫度擴大十倍，精確到一位小數(shù)tvalue=fj;t=tvalue/1000;w

8、rcom(0x80+0x41);wrdat(table1t);/顯示百位 t=tvalue%1000/100;wrdat(table1t);/顯示十位t=tvalue%100/10;wrdat(table1t);/顯示個位wrdat(0x2e); /顯示小數(shù)點兒t=tvalue%10/1;wrdat(table1t);/顯示小數(shù)位 delayms(5000);/*主函數(shù)*/void main() d1=1;d2=1;sp=1;displayinit();/初始化顯示 while(1) tmstart();/初始化 read_dealtemp();/讀取溫度 /*序列號讀取程序*/#includ

9、e #define uchar unsigned char#define uint unsigned intsbit DQ = P11; /溫度傳感器信號線sbit rs = P14; /LCD數(shù)據(jù)/命令選擇端(H/L)位聲明sbit lcden = P16; /LCD使能信號端位聲明void delay(uint z); /延時函數(shù)void DS18B20_Reset(void); /DQ18B20復位，初始化函數(shù)bit DS18B20_Readbit(void); /讀1位數(shù)據(jù)函數(shù)uchar DS18B20_ReadByte(void); /讀1個字節(jié)數(shù)據(jù)函數(shù)void DS18B20_Wr

10、iteByte(uchar dat); /向DQ18B20寫一個字節(jié)數(shù)據(jù)函數(shù)void LCD_WriteCom(uchar com); /1602液晶命令寫入函數(shù)void LCD_WriteData(uchar dat); /1602液晶數(shù)據(jù)寫入函數(shù)void LCD_Init(); /LCD初始化函數(shù)void Display18B20Rom(char Rom); /顯示18B20序列號函數(shù)/*/* 主函數(shù) */*/void main() uchar a,b,c,d,e,f,g,h; LCD_Init(); DS18B20_Reset(); delay(1); DS18B20_WriteByte

11、(0x33); delay(1); a = DS18B20_ReadByte(); b = DS18B20_ReadByte(); c = DS18B20_ReadByte(); d = DS18B20_ReadByte(); e = DS18B20_ReadByte(); f = DS18B20_ReadByte(); g = DS18B20_ReadByte(); h = DS18B20_ReadByte(); LCD_WriteCom(0x80+0x40); Display18B20Rom(h); Display18B20Rom(g); Display18B20Rom(f); Displ

12、ay18B20Rom(e); Display18B20Rom(d); Display18B20Rom(c); Display18B20Rom(b); Display18B20Rom(a); while(1);/*/* 延時函數(shù):void delay() */* 功能：延時函數(shù) */*/void delay(uint z)/延時函數(shù) uint x,y; for( x = z; x 0; x- ) for( y = 110; y 0; y- );/*/* DS18B20函數(shù):void DS18B20_Reset() */* 功能：復位18B20 */*/void DS18B20_Reset(voi

13、d)/DQ18B20復位，初始化函數(shù) uint i; DQ = 0; i = 103; while( i 0 ) i-; DQ = 1; i = 4; while( i 0 ) i-;/*/* DS18B20函數(shù):void DS18B20_Readbit() */* 功能：讀1個字節(jié)數(shù)據(jù)函數(shù) */*/bit DS18B20_Readbit(void) /讀1位數(shù)據(jù)函數(shù) uint i; bit dat; DQ = 0; i+; /i+起延時作用 DQ = 1; i+; i+; dat = DQ; i = 8; while( i 0 )i-; return( dat );/*/* DS18B20函

14、數(shù):void DS18B20_ReadByte() */* 功能：讀1個字節(jié)數(shù)據(jù)函數(shù) */*/uchar DS18B20_ReadByte(void) /讀1個字節(jié)數(shù)據(jù)函數(shù) uchar i,j,dat; dat = 0; for( i = 1; i = 8; i+ ) j = DS18B20_Readbit(); dat = ( j 1 ); return(dat);/*/* DS18B20函數(shù):void DS18B20_WriteByte() */* 功能：向DQ18B20寫一個字節(jié)數(shù)據(jù)函數(shù) */*/void DS18B20_WriteByte(uchar dat) /向DQ18B20寫一個

15、字節(jié)數(shù)據(jù)函數(shù) uint i; uchar j; bit testb; for( j=1; j1; if(testb) /寫1 DQ = 0; i+;i+; DQ = 1; i = 8;while(i0)i-; else DQ = 0; /寫0 i = 8;while(i0)i-; DQ = 1; i+;i+; /*/* LCD函數(shù):void LCD_WriteCom() */* 功能：向LCD寫入命令 */*/void LCD_WriteCom(uchar com) rs = 0; P3= com; delay(5); lcden = 0; delay(5); lcden = 1; delay

16、(5); lcden = 0;/*/* LCD函數(shù):void LCD_WriteData(uchar dat) */* 功能：向LCD寫入數(shù)據(jù) */*/void LCD_WriteData(uchar dat) rs = 1; /選擇LCD為寫入數(shù)據(jù)狀態(tài) lcden = 0; P3= dat; /將待寫入數(shù)據(jù)放到總線上 delay(5); lcden = 1; /給LCD使能端一個脈沖 delay(5); /信號將之前放到總線上 lcden = 0; /的數(shù)據(jù)寫入LCD delay(5);/*/* LCD函數(shù):void LCD_Init() */* 功能：初始化LCD，設定LCD的初始狀態(tài) */*/void LCD_Init() LCD_WriteCom(0x38); /LCD顯示模式設定 delay(15); LCD_WriteCom(0x08); /關閉LCD顯示 delay(3); LCD_WriteCom(0x01); /LCD顯示清屏 delay(3); LCD_WriteCom(0x06); /設定光標地址指針為自動加1 delay(3); LCD_Writ