DS18B20溫度顯示

#include <reg52.h>

#include "lcd.h"

#include "delay.h"

#include "commondef.h"

#include "onewire.h"

unsigned char  flag=1;

void Timer0Init(void); //10毫秒@11.0592MHz

void main()

{

unsigned char ack;

int temp;                    //保存接收溫度數據

int intTemp,decTemp;         //分離溫度數據的整數部分和小數部分

unsigned char str[12];        //保存數據轉換成的字符串ASCII

unsigned char len;

  lcdinit();

  Timer0Init();

    start18b20();

    delay(10);

while(1)

{ 

if(flag)

{

flag=0;

ack = read18b20(&temp);

if(ack)

{

  intTemp = temp >> 4;    //保留整數部分

  decTemp = temp & 0x0f;   

  len = integertostr(intTemp,str);

  str[len++]='.';

  decTemp = (decTemp*100)/16;  //*0.0625

  str[len++] = decTemp/10+'0';

  str[len++] = decTemp%10+'0';

while(len<6)

{

str[len++]=' ';

}

    str[len] = '\0';

   lcdshowstr(0,0,str);

}

start18b20();

}

}

}

void Timer0Init(void) //10毫秒@11.0592MHz

{

TMOD &= 0xF0; //設置定時器模式

TMOD |= 0x01; //設置定時器模式

TL0 = 0x00; //設置定時初值

TH0 = 0xDC; //設置定時初值

ET0 = 0;

EA = 1;

TF0 = 0; //清除TF0標誌

TR0 = 1; //定時器0開始計時

}

void Timer0_ISR() interrupt 1

{

   static unsigned char timer0Cnt=0;

    TR0=0;

TL0 = 0x00; //設置定時初值

TH0 = 0xDC; //設置定時初值

     timer0Cnt++;

if(timer0Cnt>=100)

{

  timer0Cnt=0;

flag=1;

}

TR0=1;

}

#include <reg52.h>

#include "lcd.h"

#include "delay.h"

#include "commondef.h"

#include "onewire.h"

 #define lcd_mode_pin8  0x38  //8????,??,5*8??

  #define lcd_mode_pin4  0x28  //4????,??,5*8??

  #define lcd_screen_clr  0x01  //???

  #define lcd_cursor_rst  0x02  //????

 #define lcd_dis_cur_blk_on 0x0F  //???,???,????

 #define lcd_dis_cur_on 0x0E  //???,???,?????

 #define lcd_dis_on 0x0C  //???,???,?????

 #define lcd_dis_off 0x08  //???,???,?????

 

 

  # define lcd_cursor_right 0x06   //????,?????

  # define lcd_cursor_left 0x04   //????,?????

  # define lcd_dis_mode_left 0x07   //???,AC??,????,

  # define lcd_dis_mode_right 0x05   //???,AC??,????,

#define lcd_cur_move_left 0x10 //????

#define lcd_cur_move_right 0x14 //????

#define lcd_dis_move_left 0x18 //????

#define lcd_dis_move_right 0x1C //????

void lcdreadbf()

{

unsigned char state;

unsigned char  i;

lcd1602_db=0xff;//i0??1  ??? 

lcd1602_rs=0;

lcd1602_rw=1;

do

{

  lcd1602_en=1;

state=lcd1602_db;

lcd1602_en=0;

  

  i++;

if(i>50)

break;

}

while(state&0x80);

}

void lcdwritecmd(unsigned char cmd)

{

lcdreadbf();//????? ,????? 

  lcd1602_rs=0;  

lcd1602_rw=0;

lcd1602_db=cmd;

lcd1602_en=1;

lcd1602_en=0;

}

void lcdwritedata(unsigned char dat)

{

lcdreadbf();           //????? ,?????

  lcd1602_rs=1;   

lcd1602_rw=0;

lcd1602_db=dat;

lcd1602_en=1;

lcd1602_en=0;

}

void lcdinit()

{

   lcdwritecmd(lcd_mode_pin8); //?????? 2?,5*8??

   lcdwritecmd(lcd_dis_on);     //???  ???

lcdwritecmd(lcd_cursor_right);   //????

   lcdwritecmd(lcd_screen_clr);    //??

}

void lcdsetposition(unsigned char x,unsigned char y)

{

   if(0==y)

{

lcdwritecmd(0x80|x);       //???    0X80   +0X40   =0XC0 

     }  

else

{

lcdwritecmd (0xC0+x);      //???

}

 

}

void lcdshowstr(unsigned char x,unsigned char y, unsigned char *str)

{

 

lcdsetposition(x,y);

while(*str!='\0')

{

lcdwritedata(*str++);

}

}

unsigned char integertostr(int dat,unsigned char *str)

{

  unsigned char i;

unsigned char len;

unsigned char buf[11];

if(dat<0)

{

dat= -dat;//如果是負數，取絕對值

*str = '-';

str++;

  len++;

}

  do

{

buf[i++]=dat%10+'0';   //dat%10+0x30;buf[0]='8'  buf[1]='7'

dat/=10;

}

while(dat>0);

  len += i;

while(i-- > 0)

{

   *str++=buf[i];

}

*str='\0';

return len;

}

/*

void lcdsetchar(unsigned char x,unsigned char y,unsigned char pos,unsigned char *str )

{

  unsigned char i;

for(i=0;i<8;i++);

{

lcdwritecmd(0x40+pos*8+i);

lcdwritedata(*(str+i));

  }

lcdsetposition(x,y);

lcdwritedata(0x00+pos);

}

*/

#include <reg52.h>

#include "lcd.h"

#include "delay.h"

#include "commondef.h"

#include "onewire.h"

bit onewirerest()

{

bit ack;

EA=0;

    ds18b20 = 0;

Delay600us();

ds18b20 = 1;

Delay60us();

ack = ds18b20;

while(!ds18b20);

EA=1;

return ack;

}

void writeonewire(unsigned char dat)

{

  unsigned char temp;

EA=0;

for(temp=0x01; temp!=0; temp << 1)

{

    ds18b20=0;

_nop_();

_nop_();

if((dat & temp)==0)

ds18b20=0;

        else

        ds18b20=1;

    Delay60us();

ds18b20=1;

}

   EA=1;

    }

bit readyonewire()

   {

        unsigned char dat;

    unsigned char temp;

    EA=0;

for(temp=0x01; temp!=0; temp<<1)

{

  ds18b20=0;

_nop_();

_nop_();

  ds18b20=1;

_nop_();

_nop_();

if(!ds18b20)

dat&=~temp;

    else

    dat|=temp;

    Delay60us();

    }

EA=1;

return dat;

}

//////////////////////////////

bit start18b20()

{

    bit ack;

//1 初始化

ack=onewirerest();

if(ack == 0)

{

//2ROM指令

writeonewire(SKIP_ROM);

//3功能指令，啟動溫度轉換

writeonewire(CONVERT_T);

}  

 return ~ack;

}

    bit read18b20(int*temp)

  {  

    bit ack;

    unsigned char msb,lsb;

//1初始化

ack=onewirerest();

    if(ack==0)

  {  

//2ROM指令

    writeonewire(SKIP_ROM); 

    //3功能指令，啟動溫度轉換

writeonewire(READ_REGISTER);

    //4 讀轉換結果 根據功能指令來確實 

    lsb=readyonewire();

    msb=readyonewire();

    *temp =((int)msb<<8)+lsb;   

  }

  

  return ~ack;

}

#ifndef __ONEWIRE_H__

#define __ONEWIRE_H__

//#include "reg52.h"

 sbit ds18b20 =  P2^2;

 bit onewirerest();

 bit read18b20(int*temp);

 bit start18b20();

 bit readyonewire();

void writeonewire(unsigned char dat);

//ROM

#define SEARCH_ROM            0xf0      //搜索ROM指令

#define READ_ROM              0X33      //讀取ROM指令

#define  MATH_ROM             0X55      //匹配ROM指令

#define  SKIP_ROM             0XCC      //跳過ROM指令

#define  ALARM_SEARCH         0XEC      //報警搜索指令

// 暫存器指令

#define   CONVERT_T           0X44   //溫度轉換指令

#define   WRITE_REGISTER      0X4E   //寫暫存器指令

#define   READ_REGISTER       0XBE   //讀取暫存器指令

#define   COPY_REGISTER       0X48   //拷貝暫存器指令

#define   RECALL_E2           0XB8   //召回EEPROM指令

#define   READ_POWER_SUPPLY   0XB4   //讀取電源模式指令

#endif

#include <reg52.h>

#include "lcd.h"

#include "delay.h"

#include "commondef.h"

#include "onewire.h"

void Delay600us() //@11.0592MHz

{

uchar i,j;

_nop_();

i = 2;

j = 15;

do

{

while (--j);

} while (--i);

}

void Delay60us() //@11.0592MHz

{

uchar i;

i = 25;

while (--i);

}

void delay(uint16 x_ms) //延遲  x_ms*1  毫秒

{

uint16 i,j;

for(i=x_ms;i>2;i--)

for(j=1;j>2;j--);

}

/*----

REG52.H

Header file for generic 80C52 and 80C32 microcontroller.

Copyright (c) 1988-2002 Keil Elektronik GmbH and Keil Software, Inc.

All rights reserved.

----*/

#ifndef __DELAY_H__

#define __DELAY_H__

#include "delay.h"

#include "intrins.h"

#define uint16 unsigned int

#define uchar unsigned char

void Delay600us(); //@11.0592MHz

void Delay60us(); //@11.0592MHz

void delay(uint16 x_ms);

#endif

/*----

REG52.H

Header file for generic 80C52 and 80C32 microcontroller.

Copyright (c) 1988-2002 Keil Elektronik GmbH and Keil Software, Inc.

All rights reserved.

----*/

#ifndef __LCD_H__

#define __LCD_H__

#include <reg52.h>

#include "lcd.h"

#include "delay.h"

#include "commondef.h"

#include "onewire.h"

#define lcd1602_db P0

sbit lcd1602_en=P2^4;

sbit lcd1602_rs=P2^5;

sbit lcd1602_rw=P2^6;

void lcdshowstr(unsigned char x,unsigned char y, unsigned char *str);

void lcdsetposition(unsigned char x,unsigned char y);

void lcdwritecgram();

void lcdinit();

void lcdwritecgram();

void lcdwritedata(unsigned char dat);

unsigned char integertostr(int dat,unsigned char *str);

#endif