lcd1602.c

单片机控制单总线DS1820数字温度计,并通过LCD显示出来 有仿真文件,用proteus6.9 sp4看.

#include "lcd1602.h"
#include "ds18b20.h"
#include <stdio.h>

unsigned char temp[5];
extern char xiaoshu_temp[5],zhen_temp[4];
extern bit flag;
extern bit dot_dis;
void delay(unsigned int time)
{
	unsigned int i,j;
	for(i=0;i<time;i++)
		for(j=0;j<200;j++);
}

	
void main(void)
{ 
 	unsigned char i;

 	char *str="temperature is ";
	serial_set();
 	Lcd_Init();
 	ClrScreen();
	GotoXY(0,0);
 	Print(str);
	dot_dis=1;

 	while(1)
 	{
		ds18b20_init();

 		ds18b20_writecommand(0xcc);
 		ds18b20_writecommand(0x44);	 //转换
		delay(500);


 		ds18b20_init();
 		ds18b20_writecommand(0xcc);
 		ds18b20_writecommand(0xbe);	  //读


 		for(i=0;i<2;i++)
 		{
 	
 			temp[i]=ds18b20_readdata();
		
 		}
			ds18b20_init();
 			temperature_process(temp[0],temp[1]);
	
		if(!flag) //正
		{
			GotoXY(0,1);
			Print(zhen_temp);
			if(dot_dis)	
			Print(".");
			Print(xiaoshu_temp);
		}
		else   //负
		{
			GotoXY(0,1);
			Print("-");
			Print(zhen_temp);	
			Print(".");
			Print(xiaoshu_temp);

  	 }
	   delay(100);
	}
 	while(1);
	
}