???#include?
#include
sbit?RS?=?P1^2;???//定義端口?
sbit?RW?=?P1^1;
sbit?EN?=?P1^0;
sbit?DQ=P1^6;
sbit?FMQ=P1^5;
sbit?SCL=?P3^6;
sbit?SDA=?P3^7;
sbit?P22=P2^2;?//將?P14位定義為?P1.4引腳
sbit?P23=P2^3;?//將?P15位定義為?P1.5引腳
sbit?P24=P2^4;?//將?P16位定義為?P1.6引腳
sbit?P25=P2^5;?//將?P17位定義為?P1.7引腳							???
#define?RS_CLR?RS=0?
#define?RS_SET?RS=1

#define?RW_CLR?RW=0?
#define?RW_SET?RW=1?

#define?EN_CLR?EN=0
#define?EN_SET?EN=1

#define?DataPort?P0
#define?uint?unsigned?int
#define?uchar?unsigned?char
?typedef?unsigned?int?u16;	??//對(duì)數(shù)據(jù)類型進(jìn)行聲明定義

uchar?key;

uchar?data?b[8];
int?num1=50;//上限溫度定義
int?num2=20;	?//下限溫度定義
int?num3=50;//上限溫度定義
int?num4=10;	?//下限溫度定義?
??/*----------------------------------------------
??????????????延時(shí)函數(shù)
------------------------------------------------*/
void?DelayUs2x（unsigned?char?t）
{???
?while（t--）;
}

void?DelayMs（unsigned?char?t）
{
??while（t--）
?{
?????//大致延時(shí)1mS
?????DelayUs2x（245）;
	?DelayUs2x（245）;

?}
}



/*----------------------------------------------
??????????????LCD液晶顯示程序
------------------------------------------------*/
?bit?LCD_Check_Busy（void）????//判忙函數(shù)
?{?
???DataPort=?0xFF;?
???RS_CLR;?
???RW_SET;?
???EN_CLR;?
???_nop_（）;?
???EN_SET;
???return?（bit）（DataPort?&?0x80）;
?}
/*****************寫(xiě)入命令函數(shù)******************/
?void?LCD_Write_Com（unsigned?char?com）?
?{??
???while（LCD_Check_Busy（））;?//忙則等待
???RS_CLR;?
???RW_CLR;?
???EN_SET;?
???DataPort=?com;?
???_nop_（）;?
???EN_CLR;
?}
/******************寫(xiě)入數(shù)據(jù)函數(shù)******************/
?void?LCD_Write_Data（unsigned?char?Data）?
?{?
???while（LCD_Check_Busy（））;?//忙則等待
???RS_SET;?
???RW_CLR;?
???EN_SET;?
???DataPort=?Data;?
???_nop_（）;
???EN_CLR;
?}

/******************清屏函數(shù)***********************/

?void?LCD_Clear（void）?
?{?
?LCD_Write_Com（0x01）;?
?DelayMs（5）;
?}

/************寫(xiě)入字符串函數(shù)************************/

?void?LCD_Write_String（unsigned?char?xunsigned?char?yunsigned?char?*s）?
?{?????
?if?（y?==?0）?
?	{?????
	?LCD_Write_Com（0x80?+?x）;?????//表示第一行
?	}
?else?
?	{??????
?	LCD_Write_Com（0xC0?+?x）;??????//表示第二行
?	}????????
?while?（*s）?
?	{?????
?LCD_Write_Data（?*s）;?????
?s?++;?????
?	}
?}

/*******************寫(xiě)入字符函數(shù)?*******************/?

?void?LCD_Write_Char（unsigned?char?xunsigned?char?yunsigned?char?Data）?
?{?????
?if?（y?==?0）?
?	{?????
?	LCD_Write_Com（0x80?+?x）;?????
?	}????
?else?
?	{?????
?	LCD_Write_Com（0xC0?+?x）;?????
?	}????????
?LCD_Write_Data（?Data）;??
?}

/**************?LCD初始化函數(shù)?**************/
??void?LCD_Init（void）?
?{
???LCD_Write_Com（0x38）;????/*顯示模式設(shè)置*/?
???DelayMs（5）;?
???LCD_Write_Com（0x38）;?
???DelayMs（5）;?
???LCD_Write_Com（0x38）;?
???DelayMs（5）;?
???LCD_Write_Com（0x38）;??
???LCD_Write_Com（0x08）;????/*顯示關(guān)閉*/?
???LCD_Write_Com（0x01）;????/*顯示清屏*/?
???LCD_Write_Com（0x06）;????/*顯示光標(biāo)移動(dòng)設(shè)置*/?
???DelayMs（5）;?
???LCD_Write_Com（0x0C）;????/*顯示開(kāi)及光標(biāo)設(shè)置*/
???}????
?	?
??/*------------------------------------------------