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#include <reg51.h>	
#include "lcd.h"
#include <intrins.h> 
#define uchar unsigned char
#define uint unsigned int
#define ulong unsigned long	 

#define NACK	0
#define ACK		1
#define MEASURE_TEMP	0x03	//000 0001  1
#define MEASURE_HUMI	0x05	//000 0010  1
#define STATUS_REG_W	0x06	//000 0011  0
#define STATUS_REG_R	0x07	//000 0011  1
#define RESET			0x1E	//000 1111  0
ulong volt;//测量的电压值
sbit Data=P2^3;   //定义数据线
sbit CLK=P3^3;//定义时钟信号口
sbit DIN=P3^1;//定义2543数据写入口
sbit DOUT=P3^0;//定义2543数据读取口
sbit CS=P3^2;//定义2543片选信号口

sbit zuoLed = P1^0;
sbit youLed = P1^1;
sbit froLed = P1^2;
sbit lastLed = P1^3;
sbit zuoKey = P1^4;
sbit youKey = P1^5;
sbit froKey = P1^6;
sbit lastKey = P1^7;
uchar cc,ee;
bit zuoFlag = 0,youFlag = 0, froFlag = 0, lastFlag = 0,lightFlag = 0;

sbit BEEP =P2^5;
uchar rec_dat[9];   //用于显示的接收数据数组

ulong C2_max = 3500000;
ulong C2_now = 0;

int display = 0;
void delayus(uint x) { while(x--); }

void delay_50us(unsigned int t)	 //延时函数 
{
	unsigned int j,k;
	for (;t>0;t--) 

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