//溫度傳感器DS18B20試驗(yàn)
//間隔2s采集一次溫度值
//使用1602的液晶作為顯示
#include <iom16v.h>     
#include <macros.h>
#include "18B20.h"
#include "1602.h"

uchar adc_0[]={"Temperature:"};
uchar adc_1[]={0xdf,0x43};   //溫度ascii代碼

//延時(shí)函數(shù)在16M時(shí)延時(shí)1ms
void s_1ms(unsigned int ms)
{
    unsigned int aa;
	for(;ms>=1;ms--)
	{
	for(aa=0;aa<=2000;aa++)
	{;}
	}
}	
 

void main()
{ 
unsigned int i,tem3,tem2,tem1;
//端口初始化
DDRA = 0xff;      
PORTA = 0x00;      
DDRB = 0xFF;    
PORTB = 0xF0;       
DDRC = 0x00; 
PORTC = 0xFF; 
DDRD = 0xff; 
PORTD = 0xff;
 
//延時(shí)200ms
s_1ms(200); 
//DS18B20復(fù)位
ds1820_reset();      
//1602 初始化
LcdInit();   
WriteChar(1,0,12,adc_0);
WriteChar(1,14,2,adc_1);

while (1) 
  {
  //進(jìn)行一次轉(zhuǎn)換
  ds1820_start();    
  s_1ms(1000);     
  i = ds1820_read_temp();   //讀取溫度數(shù)值
  i = (i * 10) / 16;        //數(shù)值處理     數(shù)值*0.625
  //第3位沒有顯示
  i = i % 1000;  
  //顯示第2位
  tem2= i / 100;
  WriteNum(1,12,tem2); 
  i = i % 100;  
  //顯示第1位
  tem1= i / 10;
  WriteNum(1,13,tem1);
  } 
}