单片机源程序如下:

#include /////////////头文件

////////////////////////////////////////////////////////////////////////////

void LcdShowStr(unsigned char x, unsigned char y, unsigned char *str);

void ConfigTimer0(unsigned int ms);

unsigned char IntToString(unsigned char *str, int dat);

extern bit Start18B20();

extern bit Get18B20Temp(int *temp);

extern void InitLcd1602();

bit DHT_Start();

void aj (void);

bit DHT_ByteRead(unsigned char *dat);

/////////////////////////////////////////////////////////////////////

sbit K1=P1^4; ///引脚声明

sbit K2=P1^5;

sbit K3=P1^6;

sbit K4=P1^7;

sbit M1=P1^0;

sbit M2=P1^1;

sbit M3=P1^2;

sbit M4=P1^3;

sbit D1=P2^7;

sbit D2=P2^6;

sbit KD1=P2^3;

sbit KD2=P2^4;

/////////////////

///////////////////////////// 数组命名

int SD,WD,x,xx,SDC,WDC,PWM1,PWM2;

int KK1,KK2;

int wdg=40,wdd=20,sdg=80,sdd=60;

bit SZ,JB;

bit flag1s = 0; //1s定时标志

unsigned char T0RH = 0; //T0重载值的高字节

unsigned char T0RL = 0; //T0重载值的低字节

///////////////////////////////// 延时子程序

void delay ()

{

x=99999;

while(x--);

}

/////////////////////////////////

void main() ////////////////主程序

{

bit tmp;

unsigned char str[12];

unsigned char DHT[5];

////初始化///////////////////////

EA = 1; //开总中断

ConfigTimer0(10); //T0定时10ms

InitLcd1602(); //初始化液晶

M1=0; M1=0;M2=0;M3=0;D1=0;D2=0;

////////////////////////////////////

DHT_Start();

delay();

delay();

delay();

delay();

while (1)

{

LcdShowStr(0, 0, "WD"); //显示到液晶屏上

LcdShowStr(0, 1, "SD"); //显示到液晶屏上

LcdShowStr(5, 0, "H"); //显示到液晶屏上

LcdShowStr(5, 1, "H"); //显示到液晶屏上

LcdShowStr(9, 0, "L"); //显示到液晶屏上

LcdShowStr(9, 1, "L"); //显示到液晶屏上

if (flag1s) //每秒更新一次温度

{

str[0] = (wdg/10)%10 + '0'; //十位转为ASCII码

str[1] = (wdg%10) + '0'; //个位转为ASCII

str[2] = '