单总线两个ds18b20测温12684显示.doc

#include#include/内含-NOP-函数#include#include/#include#define uchar unsigned char#define uint unsigned int int l=0;/*宏定义所需指令#define BASIC_SET 0x30#define EXTEND_SET 0x34#define DRAW_ON 0x36#define DRAW_OFF 0x34 unsigned char temp0=0x00;unsigned char TPH,TPL;xdata unsigned char a=哈尔滨理工大学;xdata unsigned char b=当前室温为：;unsigned char c=0000000000000000;uchar code str1=0x28,0x5E,0xAC,0x28,0x03,0x00,0x00,0xB9;/ROM1uchar code str2=0x28,0xFF,0xA8,0x68,0x04,0x00,0x00,0x57;/ROM2 sbit T = P11;sbit RS = P06;sbit RW = P36;sbit EN = P37;/sbit T10 = P05;void delay_1us(unsigned int x);/extern void delay_1us(); void delay_5us(); void delay_10us(); void delay_20us(); void delay_100us(); void delay_200us(); void DelayXus(unsigned char n); bit reset_DS18B20(); void writeByte_DS18B20(unsigned char x); unsigned char readByte_DS18B20(); void show_Temperature(uchar x); void DS18B20_show(uchar x); void init_DS18B20(); typedef unsigned char uint8;typedef char int8;typedef unsigned short uint16;typedef short int16;typedef unsigned long uint32;typedef long int32; unsignedcharExchange(unsignedcharch)unsignedcharTT=0x80;unsignedcharEE=0x01;unsignedcharTemp=0, i;for(i=0;i1;EE=EE1;return Temp;void delay1ms(uint ms)/延时1毫秒（不够精确的） uint i,j; for(i=0;ims;i+) for(j=0;j100;j+);voidDelay1(unsigned intn)unsigned inti;for(i=0;in;i+) _nop_();/*ms级延时函数void delay_1ms(uint x)uint i,j;for(j = 0;j x; j+)for(i = 0;i 110; i+); void LCD_write_command(unsigned char command) /Checkbusy();RS = 0;RW = 1;Delay1(10);RW = 0;EN=1; P2=Exchange(command); EN = 0; uchar read_dat(void)uchar temp;P2=0xff ; RS=1 ; RW=1 ; Delay1(25); EN=0 ; EN=1 ; temp=P2 ; EN=0 ;return Exchange(temp); /*写入一个字节的数据*/void LCD_write_byte(unsigned char ch) RS = 1;RW = 1; Delay1(10);RW = 0;EN = 1;P2=Exchange(ch);EN = 0;void LCD_write_line(unsigned char *ch, unsigned int LCD_line, unsigned char LCD_High) int str_len=0;intLCD_line_len=16;int i=0;unsigned char addr;str_len = strlen(ch);if(str_len16)/要显示的字符串可能大于16 ByteLCD_line_len = str_len;else;switch(LCD_line)case 1:/写入第一行addr = 0x80;break;case 2:/写入第二行addr = 0x90;break;case 3:/写入第三行addr = 0x88;break;case 4:/写入第四行addr = 0x98;break;default: break;LCD_write_command(addr+LCD_High);while(iLCD_line_len)LCD_write_byte(chi);i+;/*voidShowAncientPeom() LCD_write_command(0x30);LCD_write_command(0x01); Delay1(500);LCD_write_line(b,1,0);/LCD_write_line(a,1,4); /strcpy(d,g0); LCD_write_line(d,2,1);LCD_write_line(c1,3,0);LCD_write_line(a,4,0); */void LCD_init()unsigned char command;RS = 0;RW = 0;EN = 0;/command = 0x30;/LCD_write_command(command);command = 0x30;LCD_write_command(command);command = 0x0c;LCD_write_command(command);command = 0x01;LCD_write_command(command); command = 0x06;LCD_write_command(command); void delay_1us(unsigned int x)unsigned int i;x = x*5/4;for(i=0;ix;i+);void init_DS18B20()bit result;T = 1;delay_1us(5);/延迟几微秒T = 0;/单片机将单线总线信号拉低480-950 us,delay_1us(500);/然后释放总线（拉高电平）T = 1;delay_1us(20);/等待15-60 us 等待DS18B20输出脉冲 delay_1us(100);/DS18B20会持续输出60-240 us，/之后DS18B20会拉高电平，释放总线result = T;bit reset_DS18B20()bit flag;T = 0;DelayXus(240);DelayXus(240);/*delay_200us();delay_200us();delay_100us();delay_20us();*/T = 1;/delay_100us();/delay_20us();DelayXus(100);while(T);flag = T;/*delay_200us();delay_20us();delay_10us();delay_10us();*/DelayXus(240);DelayXus(180);/while(!T);/delay_100us();return(flag);/*void delay_1us() /STC11/10系列长调用LCALL花费6个时钟周期， /ret返回花费4个时钟周期_nop_();/NOP指令花费1个时钟周期_nop_(); */void delay_5us() _nop_();void delay_10us()delay_5us();_nop_();void delay_20us()delay_10us();delay_5us();_nop_();void delay_100us()delay_20us();delay_20us();delay_20us();delay_20us();delay_10us();delay_5us();_nop_();void delay_200us()delay_100us();delay_20us();delay_20us();delay_20us();delay_20us();delay_10us();delay_5us();_nop_();void writeByte_DS18B20(unsigned char dat)unsigned char i=0;for(i=0;i=1;unsigned char readByte_DS18B20()unsigned char i;for(i=0;i=1;T= 0; /单片机拉低信号,开始/_nop_();DelayXus(1);T = 1;/_nop_();DelayXus(1);if(T=1)temp0|=0x80;DelayXus(20);DelayXus(20);/delay_20us();/delay_20us();/等待控制器 开始在45us内采样return(temp0);/*void show_Temperature() int i=0; reset_DS18B20(); /设备复位 writeByte_DS18B20(0xCC); /跳过ROM命令 writeByte_DS18B20(0x44); /开始转换命令 while (!T); /等待转换完成 reset_DS18B20(); /设备复位 writeByte_DS18B20(0xCC); /跳过ROM命令 writeByte_DS18B20(0xBE); /读暂存存储器命令 TPL = readByte_DS18B20(); /读温度低字节 TPH = readByte_DS18B20(); /读温度高字节while(i20000)i+; DS18B20_show(); */void b20_Matchrom(uchar a) /匹配ROMchar j;writeByte_DS18B20(0x55); /发送匹配ROM命令if(a=1)for(j=0;j8;j+)writeByte_DS18B20(str1j);/发送18B20的序列号，先发送低字节 if(a=2)for(j=0;j8;j+)writeByte_DS18B20(str2j);/发送18B20的序列号，先发送低字节 void show_Temperature(uchar z)/*读取温度值并转换*/int i=0;reset_DS18B20(); writeByte_DS18B20(0xCC);/for(i=0;i8;i+)/ / str1i=readByte_DS18B20(); /读序列号reset_DS18B20(); if(z=1)b20_Matchrom(1); /匹配ROM 1if(z=2)b20_Matchrom(2); /匹配ROM 2writeByte_DS18B20(0x44);delay1ms(5);reset_DS18B20(); writeByte_DS18B20(0xCC);/读序列号reset_DS18B20(); if(z=1)b20_Matchrom(1); /匹配ROM 1if(z=2)b20_Matchrom(2);/匹配ROM 2 writeByte_DS18B20(0xBE); /*读取温度*/ TPL = readByte_DS18B20();TPH = readByte_DS18B20();/*tvalue=TPH;tvalue=8;tvalue=tvalue|TPL; if(tvalue0x0fff) tflag=0; else tvalue=tvalue+1;tflag=1; tt=tvalue*0.0625;tvalue=tt*10;return(tvalue);*/while(i20000)i+; DS18B20_show(z);/*向TPL TPH中的字在LCD上显示出来写1字节数据*/void DS18B20_show(uchar z)unsigned char temperature14;unsigned char temp1; /存放整数部分/unsigned char temp2; /存放小数部分uint16 temp3; /存放小数+整数unsigned char temp=Temp+000.0000;temperature0=+;temperature1=0;temperature2=0;temperature3=0;temperature4=0;temperature5=0;temperature6=0;temperature7=0;temperature8=.;temperature9=0;temperature10=0;temperature11=0;temperature12=0;temperature13=0;if(TPH&0xf8)temperature0=-;if(TPH&0x04)temperature1=1;if(TPH&0x02)temperature2=1;if(TPH&0x01)temperature3=1;if(TPL&0x80)temperature4=1;if(TPL&0x40)temperature5=1;if(TPL&0x20)temperature6=1;if(TPL&0x10)temperature7=1;if(TPL&0x08)temperature9=1;if(TPL&0x04)temperature10=1;if(TPL&0x02)temperature11=1;if(TPL&0x01)temperature12=1;/ 温度为 正负时 分别将其二进制数放进两个字节temp3=(0x0000|TPH)8)|TPL);/将TPL，TPH中的整数部分的数 /移到16位temp3中if(TPH&0xf8)temp4=-;temp3=temp3+0x0001; /将其转化成正数的二进制形式 else/temp1=(TPH&0x07)4);temp1 = (temp34)&0x007f;switch(temp1/100)/设置整数部分百位数字符 temp=温度+000.0000case 0x00:temp5=0;break;case 0x01:temp5=1;break;default:break;switch(temp1%100)/10)/设置整数部分十位数字符 temp=温度+000.0000case 0x00:temp6=0;break;case 0x01:temp6=1;break;case 0x02:temp6=2;break;case 0x03:temp6=3;break;case 0x04:temp6=4;break;case 0x05:temp6=5;break;case 0x06:temp6=6;break;case 0x07:temp6=7;break;case 0x08:temp6=8;break;case 0x09:temp6=9;break;default:break;switch(temp1%100)%10)/设置整数部分个位数字符 temp=温度+000.0000case 0x00:temp7=0;break;case 0x01:temp7=1;break;case 0x02:temp7=2;break;case 0x03:temp7=3;break;case 0x04:temp7=4;break;case 0x05:temp7=5;break;case 0x06:temp7=6;break;case 0x07:temp7=7;break;case 0x08:temp7=8;break;case 0x09:temp7=9;break;default:break;/设置小数部分 显示字符temp=温度+000.0000/temp1 = TPL&0x0f;temp1 = temp3&0x000f;switch(temp1)case 0x00:temp9=0;temp10=0;/0.0625*0temp11=0;temp12=0; break;case 0x01:temp9=0;temp10=6;/0.0625*1temp11=2;temp12=5; break;case 0x02:temp9=1;temp10=2;/0.0625*2temp11=5;temp12=0; break;case 0x03:temp9=1;temp10=8;/0.0625*3temp11=7;temp12=5; break;case 0x04:temp9=2;temp10=5;/0.0625*4temp11=0;temp12=0; break;case 0x05:temp9=3;temp10=1;/0.0625*5temp11=2;temp12=5; break;case 0x06:temp9=3;temp10=7;/0.0625*6temp11=5;temp12=0; break;case 0x07:temp9=4;temp10=3;/0.0625*7temp11=7;temp12=5; break;case 0x08:temp9=5;temp10=0;/0.0625*8temp11=0;temp12=0; break;case 0x09:temp9=5;temp10=6;/0.0625*9temp11=2;temp12=5; break;case 0x0A:temp9=6;temp10=2;/0.0625*10temp11=5;temp12=0; break;case 0x0B:temp9=6;temp10=8;/0.0625*11temp11=7;temp12=5; break;case 0x0C:temp9=7;temp10=5;/0.0625*12temp11=0;temp12=0; break;case 0x0D:temp9=8;temp10=1;/0.0625*13temp11=2;temp12=5; break;case 0x0E:temp9=8;temp10=7;/0.0625*14temp11=5;temp12=0; break;case 0x0F:temp9=9;temp10=3;/0.0625*15temp11=7;temp12=5; break;default:break; /LCD_write_line(a,1,0);LCD_write_line(b,2,1);if(z=1)LCD_write_line(temp,4,0);else LCD_write_line(temp,3,0); /*延时X微秒 不同的工作环境,需要调整此函数此延时函数是使用1T的指令周期进行计算,与传统的12T的MCU不同*/ void DelayXus(unsigned char n) while (n-) _nop_(); _nop_(); void main() int i=0; LCD_init(); init_DS18B20(); while(1) /ShowAncientPeom();delay_200us();show_Temperature(1);show_Temperature(2); /*while(i8) switch(str1i&0xf0) case 0x00: c2*i=0; break; case 0x10: c2*i=1; break;