ds18b20 C程序proteus仿真

1、【精品文檔】如有侵權(quán)，請(qǐng)聯(lián)系網(wǎng)站刪除，僅供學(xué)習(xí)與交流ds18b20 C程序proteus仿真.精品文檔.DS18B20測(cè)溫顯示，proteus仿真。Written by jinsongliang具體程序如下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、讀取溫度值

2、*/temp=Get_Temputer();/2、顯示前處理*/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)/百位數(shù)不為0則顯示，若要顯示0，可將其注釋掉disp0=10;/3、顯示*/Seg_Display(disp);Lib51v3.cvoid Delay_Nus (unsigned char n)while(n-);/for (;n>0;n-);18b20.c：時(shí)序很重要，移

3、植時(shí)注意延時(shí)函數(shù)#define B20_PORTP1/此處可以設(shè)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初始化函數(shù)，失敗會(huì)返回1，初始化過(guò)程見(jiàn)注釋若單片機(jī)讀到了數(shù)據(jù)線上的低電平“0”后，還要做延時(shí)，其延時(shí)的時(shí)間從單片機(jī)發(fā)出的高電平算起最少要480微秒。之后單片機(jī)將數(shù)據(jù)線再次拉高到高電平“1”后結(jié)束。static unsigned char Init_18b20 (void) unsigned char x=0;W_B20_CHANNEL_1(); /1、從單片機(jī)拉高數(shù)據(jù)線開始 Delay_Nus(8);/6*n useconds lib51v3.cW_B20_CHANNEL_0(); Delay_Nus(81); W_B20_CHANNEL_1(); /2、單片機(jī)拉低數(shù)據(jù)線480us以

5、上，拉高數(shù)據(jù)線，釋放 Delay_Nus(14);/3、之后ds18b20，1560us以后反應(yīng)，拉高數(shù)據(jù)線 x=R_B20_CHANNEL();/4、單片機(jī)讀取數(shù)據(jù)線if(x)return x;Delay_Nus(20);return x;/x=0代表復(fù)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、);/單片機(jī)從高到低，拉低1us以上，并在15us內(nèi)產(chǎn)生寫間隙B20_PORT=temp<<B20_CHANNEL;/寫數(shù)據(jù)，(先寫低位)Delay_Nus(7);/1560us內(nèi)18B20采樣 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();/從高到低15us內(nèi)，再到高，產(chǎn)生讀間隙Delay_Nus(1);W_B20_CHANNEL_1();temp=B20_PORT<<(7-B20_CHANNEL);/讀數(shù)據(jù),從低位開始 temp&=(1<<7);r_data+=temp;Delay_Nus(8); /整個(gè)讀一位過(guò)程在60120us W_B20_CHANNEL_1();return r_data; /four若要讀出當(dāng)前的溫度數(shù)據(jù)我們需要執(zhí)行兩次工作周期，第一個(gè)周期為復(fù)位、跳過(guò)ROM指令、執(zhí)行溫度轉(zhuǎn)換存儲(chǔ)器操作指令、等待500uS溫度

8、轉(zhuǎn)換時(shí)間。緊接著執(zhí)行第二個(gè)周期為復(fù)位、跳過(guò)ROM指令、執(zhí)行讀RAM的存儲(chǔ)器操作指令、讀數(shù)據(jù)（最多為9個(gè)字節(jié)，中途可停止，只讀簡(jiǎn)單溫度值則讀前2個(gè)字節(jié)即可）signed char Get_Temputer (void)/讀取溫度值，返回的帶符號(hào)字符型-55到+127；128無(wú)法顯示，初始化失敗會(huì)顯示00.C unsigned char tem_h,tem_l;signed char temp;if(Init_18b20()=0)/復(fù)位18b20Write_18b20(SKIP_ROM);/跳過(guò)ROM Write_18b20(TEMPUTER_CONVERT);/溫度變換elsereturn te

9、mp=0;/Delay_Nus(100); if(Init_18b20()=0)/復(fù)位18b20Write_18b20(SKIP_ROM);/跳過(guò)ROMWrite_18b20(READ_ROM);/讀暫存存儲(chǔ)器elsereturn temp=0;tem_l=Read_18b20();/讀數(shù)據(jù) tem_h=Read_18b20(); 只要高字符的低四位和低字符的高四位，溫度范圍099,temp為補(bǔ)碼，直接由unsigned char 賦值給 signed char 內(nèi)容不變，代表的值改變temp=(tem_h<<4)+(tem_l>>4);return temp;Segv

10、3.c：#define COMMON_ANODIC0/共陽(yáng)數(shù)碼管#define COMMON_CATHODAL 1/共陰數(shù)碼管#define SEG_CATEGORY0/選擇共陽(yáng)數(shù)碼管#define SEG8_A(1<<0)/段A亮?xí)r為0，屬共陽(yáng)數(shù)碼管#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/此處可以設(shè)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/此處可以設(shè)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