51单片机数码管显示温度程序

//项目：数码管温度显示器//编写：LGY//功能：数码管显示温度#include"reg52.h"#include"intrins.h"#define uchar unsigned char#define uint unsigned int//******************位定义*******************************//sbit RX =P3^0;sbit TX =P3^1;sbit RX_TX_con =P3^2;//sbit Fre_check =P3^5;sbit DQ =P3^5;sbit SDA =P3^6;sbit SCL =P3^7;sbit LED_1 =P0^2;sbit LED_2 =P0^0;sbit LED_3 =P0^1;sbit LED_4 =P0^3;unsigned char a1,a2,a3,a4;unsigned int temper;unsigned char code displaycode[]={// 0 1 2 3 4 5 6 7 8 90x28, 0xee, 0x32, 0xa2, 0xe4, 0xa1, 0x21, 0xea, 0x20, 0xa0,};unsigned char code displaycode1[]={// 0. 1. 2. 3. 4. 5. 6. 7. 8. 9.0x08, 0xce, 0x12, 0x82, 0xc4, 0x81, 0x01, 0xca, 0x00, 0x80, };void INT(){P0=0xff;P1=0xff;P2=0;P3=0;DQ=1;// Fre_check=1;}void Delay(uint x){uint a,b;for(a=x;a>0;a--)for(b=110;b>0;b--);}/*void Delay1(uint x,uchar y){uint i;uchar j;for(i=x;i>0;i--);for(j=y;j>0;j--);}void reset(){unsigned char st=1;Fre_check=1;//_nop_();//_nop_();while(st){Fre_check=0;Delay1(70,30);Fre_check=1;Delay1(4,4);if(Fre_check==1) st=1;else st=0;Delay1(50,10);}}void write_byte(unsigned char date){unsigned char temp,i;Fre_check=1;//_nop_();//_nop_();for(i=8;i>0;i--){temp=date&0x01;Fre_check=0;//Delay1(1);_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();if(temp==1) Fre_check=1;Delay1(2,2);Fre_check=1;date=date>>1;}}unsigned char read_byte(){unsigned char i,date;static bit j;for(i=8;i>0;i--){date=date>>1;Fre_check=1;_nop_();_nop_();Fre_check=0;_nop_();_nop_();_nop_();_nop_();_nop_();_nop_();Fre_check=1;_nop_();_nop_();_nop_();_nop_();j=Fre_check;if(j==1) date=date|0x08;Delay1(1,1);}return (date);}*/void delay1(int b){int s;for (s = 0; s <b; s++);}unsigned char ow_reset(void){unsigned char presence;DQ = 0; //pull DQ line lowdelay1(29); // leave it low for 480μsDQ = 1; // allow line to return highdelay1(3); // wait for presencepresence = DQ; // get presence signaldelay1(25); // wait for end of timeslotreturn(presence); // presence signal returned} // presence = 0, no part = 1unsigned char read_bit(void){unsigned char i;DQ = 0; // pull DQ low to start timeslotDQ = 1; // then return highfor (i = 0; i < 3; i++); // delay 15μs fromstart of timeslot return(DQ); // return value of DQ line}void write_bit(char bitval){DQ = 0; // pull DQ low to start timeslotif(bitval==1) DQ =1; // return DQ high if write 1delay1(5);// hold value for remainder of timeslotDQ = 1;}// Delay provides 16μs per loop, plus 24μs//Therefore, delay(5) = 104μsunsigned char read_byte(void){unsigned char i;unsigned char value = 0;for (i = 0; i < 8; i++){if(read_bit()) value=value|0x01<<i;// reads byte in, one byte at a time and then// shifts it leftdelay1(6); // wait for rest of timeslot}return(value);}void write_byte(char val){unsigned char i;unsigned char temp;for (i = 0; i < 8; i++) // writes byte, one bit at a time{temp = val>>i; // shifts val right ‘i’ spacestemp &= 0x01; // copy that bit to tempwrite_bit(temp); // write bit in temp into}delay1(5);}void DisplayLed(uchar num1,uchar num2,uchar num3,uchar num4){LED_1=0;LED_2=1;LED_3=1;LED_4=1;P1=displaycode[num1];Delay(3);LED_1=1;LED_2=0;LED_3=1;LED_4=1;P1=displaycode1[num2];Delay(3);LED_1=1;LED_2=1;LED_3=0;LED_4=1;P1=displaycode[num3];Delay(3);LED_1=1;LED_2=1;LED_3=1;LED_4=0;P1=displaycode[num4];Delay(3); }void Get_tem(){unsigned char tem1,tem2,num;float aaa;int temper;ow_reset(); //复位write_byte(0xCC);//跳过ROMwrite_byte(0x44);//温度转换for(num=1000;num>0;num--)DisplayLed(a1,a2,a3,a4);ow_reset();write_byte(0xCC);write_byte(0xBE);tem1=read_byte();tem2=read_byte();aaa=(tem2*256+tem1)*6.25;temper=(int)aaa;a1=temper/1000;a2=temper%1000/100;a3=temper%100/10;a4=temper%10;}void main(){unsigned char num=0;INT();while(1){Get_tem();}}。