ds18b20c程序proteus仿真.docx

1、ds18b20c程序proteus仿真DS18B20测温显示，proteus仿真。Written by jinsongliang具体程序如下：#include#include#include#includevoid main (void) unsigned char disp5=10,0,0,14,2; signed char temp=0; while(1) /*1、读取温度值*/ temp=Get_Temputer(); /2、显示前处理*/ if(temp0;n-);：/* 时序很重要，移植时注意延时函数*/#define B20_PORT P1 /此处可以设置I/O口#define B

2、20_CHANNEL 0#define R_B20_CHANNEL() B20_PORT&(1B20_CHANNEL)#define W_B20_CHANNEL_1() B20_PORT|=(1B20_CHANNEL)#define W_B20_CHANNEL_0() B20_PORT&=(1B20_CHANNEL)#define SKIP_ROM 0xCC#define TEMPUTER_CONVERT 0x44#define READ_ROM 0xBE/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

3、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 W_B20_CHANNEL_0(); Delay_Nus(81); W_B20_CHANNEL_1(); /2、单片机拉低数据线480us以上，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、 /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;i8;i+) W_B20_CHANNEL_1(); temp=w_data&(10); W_B20_CHANNEL_0(); /单片机从高到低，拉低1us以上，并在15us内产生写间隙 B20_PORT=temp=1; W_B20_CHANNEL_1(); Delay_Nus(4);

5、 /threestatic unsigned char Read_18b20(void) unsigned char i; unsigned char temp; unsigned char r_data=0x00; for(i=0;i=1; W_B20_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&=(17); r_data+=temp; Delay_Nus(8); /整个读一

6、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 unsigned char tem_h,tem_l; sign

7、ed char temp; if(Init_18b20()=0) /复位18b20 Write_18b20(SKIP_ROM); /跳过ROM Write_18b20(TEMPUTER_CONVERT); /温度变换 else return temp=0; /Delay_Nus(100); if(Init_18b20()=0) /复位18b20 Write_18b20(SKIP_ROM); /跳过ROM Write_18b20(READ_ROM); /读暂存存储器 else return temp=0; tem_l=Read_18b20(); /读数据 tem_h=Read_18b20();

8、/*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_h4); return temp;：#define COMMON_ANODIC 0 /共阳数码管#define COMMON_CATHODAL 1 /共阴数码管#define SEG_CATEGORY 0 /选择共阳数码管#define SEG8_A (10) /段A亮时为0，属共阳数码管#define SEG8_B (11)#define SEG8_C (12)#define SEG8_D (13)#defin

9、e SEG8_E (14)#define SEG8_F (15)#define SEG8_G (16)#define SEG8_DP (17) #define SEG8_CHAR_0 (SEG8_G&SEG8_DP) #define SEG8_CHAR_1 (SEG8_A&SEG8_D&SEG8_E&SEG8_F&SEG8_G&SEG8_DP)#define SEG8_CHAR_2 (SEG8_C&SEG8_F&SEG8_DP)#define SEG8_CHAR_3 (SEG8_E&SEG8_F&SEG8_DP)#define SEG8_CHAR_4 (SEG8_A&SEG8_D&SEG8_E

10、&SEG8_DP)#define SEG8_CHAR_5 (SEG8_B&SEG8_E&SEG8_DP)#define SEG8_CHAR_6 (SEG8_B&SEG8_DP)#define SEG8_CHAR_7 (SEG8_D&SEG8_E&SEG8_F&SEG8_G&SEG8_DP)#define SEG8_CHAR_8 SEG8_DP#define SEG8_CHAR_9 (SEG8_E&SEG8_DP)#define SEG8_CHAR_ 0#define SEG8_CHAR_E (SEG8_B&SEG8_C&SEG8_DP)#define SEG8_CHAR_R (SEG8_A&S

11、EG8_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)/#define SEG8_CHAR_A/#define SEG8_CHAR_B#define SEG8_CHAR_C (SEG8_B&SEG8_C&SEG8_G&SEG8_DP)/#define SEG8_CHAR_D/#define SEG8_CHAR_F/#define SEG8_CHAR_H#if SEG_CATEGORY=COMMON_ANODIC static cons

12、t 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_CODE10 SEG8_CHAR_E, /SEG8_CODE11 SEG8_CHAR_R, /SEG8_CODE12 SEG8_CHAR_SUB, /SEG8_CODE13 SEG8_CHAR_C /SEG8_CODE14 ;#else static

13、 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_CODE10 SEG8_CHAR_E, /SEG8_CODE11 SEG8_CHAR_R, /SEG8_CODE12 SEG8_CHAR_SUB, /SEG8_CODE13 SEG8_CHAR_C /SEG8_CODE14 ;#endif#

14、define SEG8_SLECT_PORT P3 /此处可以设置I/O口#define BIT0 0 #define BIT1 1#define BIT2 2#define BIT3 3#define SEG8_BIT0_ON() SEG8_SLECT_PORT|=(1BIT0)#define SEG8_BIT0_OFF() SEG8_SLECT_PORT&=(1BIT0)#define SEG8_BIT1_ON() SEG8_SLECT_PORT|=(1BIT1)#define SEG8_BIT1_OFF() SEG8_SLECT_PORT&=(1BIT1)#define SEG8_BIT

15、2_ON() SEG8_SLECT_PORT|=(1BIT2)#define SEG8_BIT2_OFF() SEG8_SLECT_PORT&=(1BIT2)#define SEG8_BIT3_ON() SEG8_SLECT_PORT|=(1BIT3)#define SEG8_BIT3_OFF() SEG8_SLECT_PORT&=(1BIT3)#define SEG8_CODE_PORT P2 /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+; t

16、emp2=SEG8_CODE*p+; temp3=SEG8_CODE*p+; if(*p4) #if SEG_CATEGORY=COMMON_ANODIC temp*p&=SEG8_DP; #else temp*p|=SEG8_DP; #endif unsigned char i; for(i=0;i150;i+) SEG8_CODE_PORT = temp0; SEG8_BIT0_ON(); Delay_Nus(6); / SEG8_BIT0_OFF(); SEG8_CODE_PORT = temp1; SEG8_BIT1_ON(); Delay_Nus(6); SEG8_BIT1_OFF(); SEG8_CODE_PORT = temp2; SEG8_BIT2_ON(); Delay_Nus(6); SEG8_BIT2_OFF(); SEG8_CODE_PORT = temp3; SEG8_BIT3_ON(); Delay_Nus(6); SEG8_BIT3_OFF();