ds18b20 C程序proteus仿真

1、【精品文档】如有侵权，请联系网站删除，仅供学习与交流ds18b20 C程序proteus仿真.精品文档.DS18B20测温显示，proteus仿真。Written by jinsongliang具体程序如下Main.c：#include<reg51.h>#include"lib51v3.c"#include"18b20.c"#include"segv3.c"void main (void)unsigned char disp5=10,0,0,14,2;signed char temp=0;while(1)/*1、读取温度值

2、*/temp=Get_Temputer();/2、显示前处理*/if(temp<0)disp0=13;temp=-temp;disp1=temp/10;disp2=temp%10;elsedisp0=temp/100;disp1=temp/10-disp0*10;disp2=temp%10;if(!disp0)/百位数不为0则显示，若要显示0，可将其注释掉disp0=10;/3、显示*/Seg_Display(disp);Lib51v3.cvoid Delay_Nus (unsigned char n)while(n-);/for (;n>0;n-);18b20.c：时序很重要，移

3、植时注意延时函数#define B20_PORTP1/此处可以设置I/O口#define B20_CHANNEL0#define R_B20_CHANNEL()B20_PORT&(1<<B20_CHANNEL)#define W_B20_CHANNEL_1()B20_PORT|=(1<<B20_CHANNEL)#define W_B20_CHANNEL_0()B20_PORT&=(1<<B20_CHANNEL)#define SKIP_ROM0xCC#define TEMPUTER_CONVERT0x44#define READ_ROM0xB

4、E/one初始化函数，失败会返回1，初始化过程见注释若单片机读到了数据线上的低电平“0”后，还要做延时，其延时的时间从单片机发出的高电平算起最少要480微秒。之后单片机将数据线再次拉高到高电平“1”后结束。static unsigned char Init_18b20 (void) unsigned char x=0;W_B20_CHANNEL_1(); /1、从单片机拉高数据线开始 Delay_Nus(8);/6*n useconds lib51v3.cW_B20_CHANNEL_0(); Delay_Nus(81); W_B20_CHANNEL_1(); /2、单片机拉低数据线480us以

5、上，拉高数据线，释放 Delay_Nus(14);/3、之后ds18b20，1560us以后反应，拉高数据线 x=R_B20_CHANNEL();/4、单片机读取数据线if(x)return x;Delay_Nus(20);return x;/x=0代表复位成功/twostatic void Write_18b20(unsigned char w_data) unsigned char i; unsigned char temp; for(i=0;i<8;i+) W_B20_CHANNEL_1();temp=w_data&(1<<0);W_B20_CHANNEL_0(

6、);/单片机从高到低，拉低1us以上，并在15us内产生写间隙B20_PORT=temp<<B20_CHANNEL;/写数据，(先写低位)Delay_Nus(7);/1560us内18B20采样 w_data>>=1; W_B20_CHANNEL_1();Delay_Nus(4); /threestatic unsigned char Read_18b20(void) unsigned char i; unsigned char temp;unsigned char r_data=0x00;for(i=0;i<8;i+) r_data>>=1;W_B2

7、0_CHANNEL_1();W_B20_CHANNEL_0();/从高到低15us内，再到高，产生读间隙Delay_Nus(1);W_B20_CHANNEL_1();temp=B20_PORT<<(7-B20_CHANNEL);/读数据,从低位开始 temp&=(1<<7);r_data+=temp;Delay_Nus(8); /整个读一位过程在60120us W_B20_CHANNEL_1();return r_data; /four若要读出当前的温度数据我们需要执行两次工作周期，第一个周期为复位、跳过ROM指令、执行温度转换存储器操作指令、等待500uS温度

8、转换时间。紧接着执行第二个周期为复位、跳过ROM指令、执行读RAM的存储器操作指令、读数据（最多为9个字节，中途可停止，只读简单温度值则读前2个字节即可）signed char Get_Temputer (void)/读取温度值，返回的带符号字符型-55到+127；128无法显示，初始化失败会显示00.C unsigned char tem_h,tem_l;signed char temp;if(Init_18b20()=0)/复位18b20Write_18b20(SKIP_ROM);/跳过ROM Write_18b20(TEMPUTER_CONVERT);/温度变换elsereturn te

9、mp=0;/Delay_Nus(100); if(Init_18b20()=0)/复位18b20Write_18b20(SKIP_ROM);/跳过ROMWrite_18b20(READ_ROM);/读暂存存储器elsereturn temp=0;tem_l=Read_18b20();/读数据 tem_h=Read_18b20(); 只要高字符的低四位和低字符的高四位，温度范围099,temp为补码，直接由unsigned char 赋值给 signed char 内容不变，代表的值改变temp=(tem_h<<4)+(tem_l>>4);return temp;Segv

10、3.c：#define COMMON_ANODIC0/共阳数码管#define COMMON_CATHODAL 1/共阴数码管#define SEG_CATEGORY0/选择共阳数码管#define SEG8_A(1<<0)/段A亮时为0，属共阳数码管#define SEG8_B(1<<1)#define SEG8_C(1<<2)#define SEG8_D(1<<3)#define SEG8_E(1<<4)#define SEG8_F(1<<5)#define SEG8_G(1<<6)#define SEG8

11、_DP(1<<7)#defineSEG8_CHAR_0(SEG8_G&SEG8_DP)#defineSEG8_CHAR_1 (SEG8_A&SEG8_D&SEG8_E&SEG8_F&SEG8_G&SEG8_DP)#defineSEG8_CHAR_2(SEG8_C&SEG8_F&SEG8_DP)#defineSEG8_CHAR_3(SEG8_E&SEG8_F&SEG8_DP)#defineSEG8_CHAR_4(SEG8_A&SEG8_D&SEG8_E&SEG8_DP)#defin

12、eSEG8_CHAR_5(SEG8_B&SEG8_E&SEG8_DP)#defineSEG8_CHAR_6(SEG8_B&SEG8_DP)#defineSEG8_CHAR_7(SEG8_D&SEG8_E&SEG8_F&SEG8_G&SEG8_DP)#defineSEG8_CHAR_8SEG8_DP#defineSEG8_CHAR_9(SEG8_E&SEG8_DP)#defineSEG8_CHAR_0#defineSEG8_CHAR_E(SEG8_B&SEG8_C&SEG8_DP)#defineSEG8_CHAR_R

13、 (SEG8_A&SEG8_B&SEG8_C&SEG8_D&SEG8_F&SEG8_DP)#define SEG8_CHAR_SUB (SEG8_A&SEG8_B&SEG8_C&SEG8_D&SEG8_E&SEG8_F&SEG8_DP)/#defineSEG8_CHAR_A/#defineSEG8_CHAR_B#defineSEG8_CHAR_C(SEG8_B&SEG8_C&SEG8_G&SEG8_DP)/#defineSEG8_CHAR_D/#defineSEG8_CHAR_F/#

14、defineSEG8_CHAR_H#if SEG_CATEGORY=COMMON_ANODICstatic const unsigned char SEG8_CODE=SEG8_CHAR_0,SEG8_CHAR_1,SEG8_CHAR_2,SEG8_CHAR_3,SEG8_CHAR_4,SEG8_CHAR_5,SEG8_CHAR_6,SEG8_CHAR_7,SEG8_CHAR_8,SEG8_CHAR_9,SEG8_CHAR_,/SEG8_CODE10SEG8_CHAR_E,/SEG8_CODE11SEG8_CHAR_R,/SEG8_CODE12SEG8_CHAR_SUB,/SEG8_CODE1

15、3SEG8_CHAR_C/SEG8_CODE14#elsestatic const unsigned char SEG8_CODE=SEG8_CHAR_0,SEG8_CHAR_1,SEG8_CHAR_2,SEG8_CHAR_3,SEG8_CHAR_4,SEG8_CHAR_5,SEG8_CHAR_6,SEG8_CHAR_7,SEG8_CHAR_8,SEG8_CHAR_9,SEG8_CHAR_,/SEG8_CODE10SEG8_CHAR_E,/SEG8_CODE11SEG8_CHAR_R,/SEG8_CODE12SEG8_CHAR_SUB,/SEG8_CODE13SEG8_CHAR_C/SEG8_

16、CODE14#endif#define SEG8_SLECT_PORTP3/此处可以设置I/O口#define BIT00#define BIT11#define BIT22#define BIT33#define SEG8_BIT0_ON()SEG8_SLECT_PORT|=(1<<BIT0)#define SEG8_BIT0_OFF()SEG8_SLECT_PORT&=(1<<BIT0)#define SEG8_BIT1_ON()SEG8_SLECT_PORT|=(1<<BIT1)#define SEG8_BIT1_OFF()SEG8_SLECT

17、_PORT&=(1<<BIT1)#define SEG8_BIT2_ON()SEG8_SLECT_PORT|=(1<<BIT2)#define SEG8_BIT2_OFF()SEG8_SLECT_PORT&=(1<<BIT2)#define SEG8_BIT3_ON()SEG8_SLECT_PORT|=(1<<BIT3)#define SEG8_BIT3_OFF()SEG8_SLECT_PORT&=(1<<BIT3)#define SEG8_CODE_PORTP2/此处可以设置I/O口void Seg_Display (char *p)unsigned char temp4;temp0=SEG8_CODE*p+;temp1=SEG8_CODE*p+;temp2=SEG8_CODE*p+;temp3=SEG8_CODE*p+;if(*p<4)#if SEG_CATEGORY=COMMON_ANODIC temp*p&=SEG8_DP;#elsetemp*p|=SEG8_DP;#endifunsigned char i;for(i=0;i<150;i+)SEG8_CODE_PO