基于DS18B20的温度采集和显示.doc

基于DS18B20温度采集和显示#includetypedef unsigned char uchar;typedef unsigned int uint8;typedef unsigned int uint16;sbit rs = P25;sbit rw = P26;sbit e = P27;sbit DQ = P23;sbit BEEP = P12;code uint8 xsH162 = 0,0,0,6,1,2,1,8,2,5,3,1,3,7,4,3,5,0,5,6,6,2,6,8,7,5,8,1,8,7,9,3;/换用二维数组code uint8 xsL162 = 0,0,2,5,5,0,7,5,0,0,2,5,5,0,7,5,0,0,2,5,5,0,7,5,0,0,2,5,5,0,7,5;code uchar cdis1 = DS18B20 OK ;code uchar cdis2 = TMP: ;code uchar cdis3 = TMP:-;code uchar cdis4 = DS18B20 ERR0R ;code uchar cdis5 = PLEASE CHECK ;uint8 x;uint8 WD_S6;uint8 ResultSignal;uint8 TB,TS,TG;uint8 tempL;uint8 tempH;uint8 ResultLH2;ResultLL2;ResultH;/结果的小数高位,低位、整数/*函数功能：延时子程序输入：k输出：无*/void delay(uint16 k) while(k-); /*名称：delay_50us()功能：50us非精确延时，晶振12MHz*/void delay_50us(uint8 a) uint8 i; for(;a0;a-) for(i=19;i0;i-); /*函数功能：DS18B20初始化子程序输入：无输出：无*/init_DS18B02() DQ = 1; delay(8); DQ = 0; delay(80); DQ = 1; delay(8); x = DQ; delay(4); return(x); /*函数功能：从DS18B20读一字节输入：无输出：dat*/readOnechar() uint8 i; uint8 dat; for(i=8;i0;i-) DQ = 0; dat=1; DQ = 1; if(DQ) dat|=0x80; delay(4); return(dat); /*函数功能：向DS18B20写一字节数据输入：dat输出：无*/WriteOnechar(uint8 dat) uint8 i; for(i=8;i0;i-) DQ = 0; DQ = dat&0x01; delay(4); DQ = 1; dat=1; delay(4); /*名称：writ_comd功能：向LCD写指令*/void write_comd(uint8 comd) rs = 0; rw = 0; e = 0; P0 = comd; delay_50us(2); e = 1; delay_50us(3); e = 0; /*名称：write_data功能：向LCD写数据*/void write_data(uint8 dat) rs = 1; rw = 0; e = 0; P0 = dat; delay_50us(2); e = 1; delay_50us(3); e = 0; /*名称：init1602（）功能：LCD显示器初始化*/void init1602(void) delay_50us(80); write_comd(0x38); delay_50us(50); write_comd(0x38); delay_50us(50); write_comd(0x38); write_comd(0x38); write_comd(0x08); write_comd(0x01); write_comd(0x06); write_comd(0x0c);/*函数功能：从DS18B20读温度值输入：无输出：temperature*/void ReadTemperature(void) init_DS18B02(); WriteOnechar(0xcc); WriteOnechar(0x44); init_DS18B02(); WriteOnechar(0xcc); WriteOnechar(0xbe); tempL = readOnechar(); tempH = readOnechar(); /*功能：温度转换输入：无输出：无*/void Z_wd() uint8 i,j; ReadTemperature(); tempH = (tempH4); tempL = tempL&0x0f; /取低4位 if(tempH&0x80) /判断温度符号 tempH=tempH; tempL=tempL+1; ResultSignal = 1; /负 else ResultSignal = 0; /正 ResultLH0 = xsHtempL0+0x30; ResultLH1 = xsHtempL1+0x30; ResultLL0 = xsLtempL0+0x30; ResultLL1 = xsLtempL1+0x30; ResultH=tempH; TB = ResultH/100+0x30 ;/百位 TS = (ResultH%100)/10+0x30;/十位 TG = ResultH%10+0x30;/个位 if(ResultSignal = 1) for(i=0;i6;i+) WD_Si = cdis3i; if(ResultSignal = 0) for(j=0;j6;j+) WD_Sj = cdis2j; if(TB = 0x30) TB = 0x20; if(TS = 0x30) TS = 0x20; /*功能：DS18B20检测正确输入：无输出：无*/void DS18B20_OK() uint8 k; init1602(); write_comd(0x80); for(k=0;k16;k+) write_data(cdis1k); write_comd(0x80+0x40); for(k=0;k5;k+) write_data(WD_Sk); write_comd(0x80+0x45); write_data(TB);/显示百位 write_comd(0x80+0x46); write_data(TS);/显示十位 write_comd(0x80+0x47); write_data(TG);/显示个位 write_comd(0x80+0x48); write_data(0x2e);/显示小数点 write_comd(0x49+0x80); write_data(ResultLH0);/小数高位 write_comd(0x4a+0x80); write_data(ResultLH1);/小数低位 /*功能：DS18B20检测错误输入：无输出：无*/void DS18B20_error() uint8 k; init1602(); write_comd(0x80); for(k=0;k16;k+) write_data(cdis4k); write_comd(0x80+0x40); for(k=0;k16;k+) write_dat