1、#include#include#define uchar unsigned char#define uint unsigned int#define data p0 /數據端口sbit rs=p24;sbit rw=p25;sbit e=p26;sbit dht=p10;uchar firstline =wen:00.00; /第一行數據uchar secondline=shi:00.00; /第二行數據unsigned char shiz,shix,wenz,wenx,check;unsigned char tr_shiz,tr_shix,tr_wenz,tr_wenx;unsigned

2、char flag;unsigned int n=20,m;void delay_1ms(unsigned int i)unsigned int j=88;for(;i0;i-)while(j0)j-;void delay_10us()unsigned char i;i-;i-;i-;i-;i-;i-;/*/*溫濕度讀取函數*/*/char read_data()unsigned char i,num,temp;num=0;for(i=0;i8;i+)flag=2;while(!dht)&flag+);delay_10us();delay_10us();delay_10us();if(dht=

3、1) temp=1;flag=2;while(dht&flag+);elsetemp=0;num0;i-)for(j=100;j0;j-);void delayus(unsigned char us)/-延時函數 unsigned char uscnt; uscnt=us1; /*12mhz頻率*/ while(-uscnt);void delayms(unsigned char ms) while(-ms) delayus(250); delayus(250); delayus(250); delayus(250); void lcd_write_com(uchar c) /寫命令 dela

4、yms(5);/操作前短暫延時，保證信號穩定 e=0; rs=0; rw=0; _nop_(); e=1; data=c; e=0;void lcd_write_dat(uchar c) /寫數據 delayms(5); /操作前短暫延時，保證信號穩定 e=0; rs=1; rw=0; _nop_(); e=1; data=c; e=0; rs=0;void lcd_init() /lcd初始化 delayms(15); lcd_write_com(0x38); /display mode lcd_write_com(0x38); /display mode lcd_write_com(0x3

5、8); /display mode lcd_write_com(0x06); /顯示光標移動位置 lcd_write_com(0x0c); /顯示開及光標設置 lcd_write_com(0x01); /顯示清屏void showchar(uchar pos,uchar c) /顯示單個字符 unsigned char p; if (pos=0x10) p=pos+0xb0; /是第二行則命令代碼高4位為0xc else p=pos+0x80; /是第二行則命令代碼高4位為0x8 lcd_write_com(p);/寫命令 lcd_write_dat(c); /寫數據void showstri

6、ng (uchar line,char *ptr) /顯示字符串 unsigned char l,*p; p=ptr; l=line4; while(*p)!=0) showchar(l+,*(p);p+; void disp(void) /主函數調用的顯示函數 showstring(0,firstline); showstring(1,secondline); /*/*初始化及采集程序*/*/void read_init()dht=0; /主機使dht11低電平并延時至少18msdelay_1ms(21);dht=1; /主機置dht11高電平2040us,并等待從機相應delay_10us

7、();delay_10us();delay_10us();delay_10us();dht=1;if(!dht) /從機發出相應信號flag=2;while(!dht)&flag+);flag=2;while(dht&flag+);/開始采集數據tr_shiz=read_data();/采集濕度整數部分tr_shix=read_data();/采集濕度小數部分tr_wenz=read_data();/采集溫度整數部分tr_wenx=read_data();/采集溫度小數部分check=read_data();/采集校驗位dht=1; void main()unsigned char temp;lcd_init();delay(50);while(1) disp();read_init();temp=tr_shiz+tr_shix+tr_wenz+tr_wenx;if(check=temp)shiz=tr_shiz;shix=tr_shix;wenz=tr_wenz;wenx=tr_wenx;firstline4=0+wenz/10;firstline5=0+wenz%10;firstline8