#include?

#define?DQ?RC1???????//DQ端與RC相連接

#define?RS??RA5	????//??LCD控制線宏定義????RS=1數據?RS=0指令操作
#define?RW??RA4?????//???R/W讀寫選擇端
#define?E???RA3?????//???E使能端

#define?Resistor_pullup（）?TRISC1=1
#define?Bus_master_pulling_low（）?TRISC1=0;RC1=0

float?temperature;??????????//存放16位的溫度值
unsigned?char?sign=1;????//用來確定最高位的符號??正溫度（+）還是負溫度（-）

unsigned?char?bai=1;?????????????????????????????//整數百位??????????????由于顯示的分開顯示
unsigned?char?shi=1;?????????????????????????????//整數十位
unsigned?char?ge=2;??????????????????????????????//整數個位
unsigned?char?shifen=0;??????????????????????????//十分位
unsigned?char?baifen=0;??????????????????????????//百分位

__CONFIG（0x1832）;??????//?芯片配置字?


void?delayus（unsigned?char?x）						//延時us級的程序，延時時間為：3*x+9=?
{
	unsigned?char?d;
	d=x;
	while（--d）;????????????????????????????????????????//????????DECFSZ???COUNTER1
	asm（“nop“）;
}
/********************************************??????LCD相關讀寫及專用的函數?????****************************************/

void?delay_lcd（）???????????????????????????????//LCD用的延時
{
	unsigned?char?x=0x06y=0x80z;
	do
	{
		z=y;
		while（--z）;
	}while（--x）;
	asm（“nop“）;
}
void?write_lcd_code（char?code）??//???給LCD設置?命令?地址??屏幕信息???的函數
{
	PORTD=code;??????
	RS=0;???????????//RS?端低電平為命令
	RW=0;?????	?
	E=1;??????????????
	E=0;??????????????
	delay_lcd（）;
}
void?write_lcd_char（char?data）?
{
	PORTD=data;
	RS?=?1;?????????????????????
	RW?=?0;??????????????????????
	E?=?1;???????????????????????
	E?=?0;???????????????????????
	delay_lcd（）;?
}
void?write_lcd_string（char?*point）
{
?????while（*point）
??????????write_lcd_char（*point++）;
}

/****************************************************************************************************/

void?init（）?????????????????????????????????//初始化函數，包括所用的3個I/O口定義RSR/WE
{
	TRISC=0xFF;?????????????????????????//??hight??idle??state??設置為輸入
	
	ADCON1?=?0x06;??????????????		?//設置A口為普通I/O口?????????????????????/***注意當需要用A/D時改動***/
	TRISA?=?0b11000111;?????????		?//設置A口的?RA5?RA4?RA3為輸出控制LCD的
	TRISD?=?0X00;???????????????		?//設置D口為輸出（8位全部輸出數據）

	write_lcd_code（0x01）;???????????????//清屏
	write_lcd_code（0x38）;???????????????//設置16*2顯示，8位數據接口
	write_lcd_code（0b00001100）;?????????//D=1開顯示????C=0不顯示光標???B=0光標不閃爍
	write_lcd_code（0b00000110）;?????????//N=1?讀或寫一個字符后指針加1?光標加1
	write_lcd_code（0x80）;???????????????//起始地址
	write_lcd_code（0x01）;
}


/*************************************????????DS18B20??通訊函數????**************************************/???????

void?reset_presence（）
{
	unsigned?char?presence;
	do{	
		Resistor_pullup（）;???????????//保證是在高電平
		asm（“nop“）;asm（“nop“）;
	?????????????????????????????????//時序開始
		Bus_master_pulling_low（）;
		delayus（164）;			//?501us??最少延時480us???????
		Resistor_pullup（）;
		delayus（20）;			//?69us?????調用函數存在??程序指針轉移?等時間?（理論時間要求15-60us）???

		if（0==DQ）?presence=0;???//
		else??????presence=1;?
		delayus（146）;??????????//447us???MASTER???Rx??最少時間480
		}while（pre