DS18B20数码管显示温度不对,求解，以下源码

发布于：2022-12-21 ⋅ 阅读:(440) ⋅ 点赞:(0)

#include<intrins.h> void Delay500us() //@11.0592MHz { unsigned char i; _nop_(); i = 227; while (--i); } void Delay100us() //@11.0592MHz { unsigned char i; _nop_(); i = 43; while (--i); } void Delay400us() //@11.0592MHz { unsigned char i; _nop_(); i = 181; while (--i); } void Delay55us() //@11.0592MHz { unsigned char i; _nop_(); i = 22; while (--i); } void Delay58us() //@11.0592MHz { unsigned char i; i = 24; while (--i); } void Delay5us() //@11.0592MHz { } void Delay750ms() //@11.0592MHz { unsigned char i, j, k; _nop_(); i = 6; j = 65; k = 181; do { do { while (--k); } while (--j); } while (--i); } void Delay1000ms() //@11.0592MHz { unsigned char i, j, k; _nop_(); i = 8; j = 1; k = 243; do { do { while (--k); } while (--j); } while (--i); }	#ifndef __DELAY_H__ #define __DELAY_H__ void Delay500us(); void Delay100us(); void Delay400us(); void Delay55us(); void Delay58us(); void Delay5us(); void Delay750ms(); void Delay1000ms(); #endif
#include <REGX52.H> #include<intrins.h> #include"delay.h" sbit DS18B20_IO=P3^7; unsigned char DS18B20_init() { unsigned char ack=1; DS18B20_IO=1; DS18B20_IO=0; Delay500us(); DS18B20_IO=1; Delay100us(); ack=DS18B20_IO; Delay400us(); DS18B20_IO=1; return ack; } void DS18B20_write_bit(unsigned char sendbit) { DS18B20_IO=0; Delay5us(); DS18B20_IO=sendbit; Delay55us(); DS18B20_IO=1; _nop_(); //delay 2us } unsigned char DS18B20_read_bit() { unsigned char readbit; DS18B20_IO=0; _nop_(); //delay 2us DS18B20_IO=1; _nop_(); //delay 2us readbit=DS18B20_IO; Delay58us(); DS18B20_IO=1; _nop_(); //delay 2us return readbit; } void DS18B20_write_byte(unsigned char sendbyte) { void DS18B20_write_bit(unsigned char sendbit); unsigned char i; for(i=0;i<8;i++) { DS18B20_write_bit(sendbyte&(0x01<<i)); } } unsigned char DS18B20_read_byte() { unsigned char DS18B20_read_bit(); unsigned char i,rb,readbyte=0x00; for(i=0;i<8;i++) { if(rb=(DS18B20_read_bit())) readbyte\|=0x01<<i; } return readbyte; }	#ifndef __DS18B20_BASICSETUP_H__ #define __DS18B20_BASICSETUP_H__ unsigned char DS18B20_init(); void DS18B20_write_byte(unsigned char sendbyte); unsigned char DS18B20_read_byte(); #endif
#include"DS18B20_basicsetup.h" #include<intrins.h> #include"delay.h" #define DS18B20_SKIPROM 0XCC #define DS18B20_CONVERT_TEMPERATURE 0X44 #define DS18B20_WRITE_SCRATCHPAD 0X4E #define DS18B20_READ_SCRATCHPAD 0XBE #define DS18B20_COPY_SCRATCHPAD 0X48 void DS18B20_convert_t() { unsigned char n=1; DS18B20_init(); DS18B20_write_byte(DS18B20_SKIPROM); DS18B20_write_byte(DS18B20_CONVERT_TEMPERATURE); Delay1000ms(); } float DS18B20_read_t() { unsigned char n=1,T_LSB,T_MSB; int t; float T; DS18B20_init(); DS18B20_write_byte(DS18B20_SKIPROM); DS18B20_write_byte(DS18B20_READ_SCRATCHPAD); T_LSB=DS18B20_read_byte(); T_MSB=DS18B20_read_byte(); t=(T_MSB<<8)\|T_LSB; T=t/16.0; return T; }	#ifndef __DS18B20_ORDER_H__ #define __DS18B20_ORDER_H__ void DS18B20_convert_t(); float DS18B20_read_t(); #endif
#include <REGX52.H> unsigned char timer_0[8]={1,2,3,4,5,6,7,8}; void time_init() { TMOD=TMOD&0xf0; TMOD=TMOD\|0X01; EA=1; ET0=1; TR0=1; TF0=0; TH0=64536/256; TL0=64536%256; } void lednumscan() { void displaynum(unsigned char loc,unsigned char n); static unsigned char i; displaynum(i,timer_0[i]); i++; if(i>=8) i=0; } void displaynum(unsigned char loc,unsigned char n) { unsigned char numtens[12]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x00,0x40}; //p0 0~9 and off and - unsigned char numindiv[10]={0xbf,0x86,0xdb,0xcf,0xe6,0x6d,0xfd,0x87,0xff,0xef};//p0 0.~9. unsigned char location[8]={0x00,0x04,0x08,0x0c,0x10,0x14,0x18,0x1c}; //p2 0~7 from right to left P0=0x00; P2=location[loc]; P0=numtens[n]; if(timer_0[7]==1&&P2==location[7]) P0=numtens[11]; if(timer_0[7]==0&&P2==location[7]) P0=numtens[10]; if(P2==location[4]) P0=numindiv[n]; } void display_T(float T) { long num; if(T<0) {T=-T;timer_0[7]=1;} else timer_0[7]=0; num=(long)(T*10000); timer_0[6]=(unsigned char)(num/1000000); timer_0[5]=(unsigned char)(num%1000000/100000); timer_0[4]=(unsigned char)(num%100000/10000); timer_0[3]=(unsigned char)(num%10000/1000); timer_0[2]=(unsigned char)(num%1000/100); timer_0[1]=(unsigned char)(num%100/10); timer_0[0]=(unsigned char)(num%10); }	#ifndef __TEMPERATURE_DISPLAY_H__ #define __TEMPERATURE_DISPLAY_H__ void time_init(); void lednumscan(); void display_T(float T); #endif
#include <REGX52.H> #include"DS18B20_order.h" #include"temperature_display.h" void main() { float temperature; time_init(); while(1) { DS18B20_convert_t(); temperature=DS18B20_read_t(); display_T(temperature); } } void timer0() interrupt 1 { static unsigned char n; TH0=64536/256; TL0=64536%256; n++; if(n==2) {n=0;lednumscan();} }	主函数

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