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#include<reg52.h>
#include "intrins.h"
typedef unsigned char uint8;
typedef unsigned int uint16;
sbit rs=P2^6; // êy¾YÃüáîÑ¡Ôñ
sbit rw=P2^5; //¶áD′Ñ¡Ôñ
sbit e=P2^7; //ê1Äü
sbit k1=P3^3; //Ä￡ê½
sbit k2=P2^1; //¼ó
sbit k3=P2^2; //¼õ
sbit DHT11_DQ_OUT=P3^2;
sbit led1=P3^6;
sbit led2=P3^7;
sbit dq=P2^0;
uint8 mode=0,xian;
char temph=50,templ=20;
char humih=80,humil=20;
uint8 temp,humi;
uint8 flag; //é趨±¨¾ˉ±êÖ¾
uint8 a,c,tempvalue;
uint8 code num[10]="0123456789";
uint8 code str1[]="Temp:"; //릏
uint8 code str2[]="Humi:"; //êa¶è
uint8 code str3[]="Error";
uint8 code str4[]="Success ";
uint8 code str5[]="%RH";
uint8 code str6[]="TempH:"; //é趨ζèéÏÏTÏÔê¾
uint8 code str7[]="TempL:"; //é趨ζèÏÂÏTÏÔê¾
uint8 code str8[]="HumiH:"; //é趨êa¶èéÏÏTÏÔê¾
uint8 code str9[]="HumiL:"; //é趨êa¶èÏÂÏTÏÔê¾
void delay(uint16 i)
{
while(i--);
}
void delay_ms(uint16 i)
{
while(i--)
delay(90);
}
void wrc(uint8 c) //D′Ãüáî
{
delay(1000);
rs=0;
rw=0;
e=0;
P0=c;
e=1;
delay(10);
e=0;
}
void wrd(uint8 dat) //D′êy¾Y
{
delay(1000);
rs=1;
rw=0;
e=0;
P0=dat;
e=1;
delay(10);
e=0;
rs=0;
}
void lcd_init() // LCD16023õê¼»ˉ
{
delay(1000);
wrc(0x38);
wrc(0x38); //1|ÄüéèÖÃÃüáî￡¬Ñ¡Ôñ8λ×üÏß￡¬Ë«DDÏÔê¾ 5*7μãÕó×Ö·û
wrc(0x38);
wrc(0x06); //1a±êoíÏÔê¾Ä￡ê½éèÖà 1a±êóòòÆ ÕûÆá2»òƶˉ
wrc(0x0c); //ÏÔ꾿a1Ø¿ØÖÆ ¿aÏÔê¾ ÎT1a±ê 1a±ê2»éá˸
wrc(0x01); //ÇåáãÖ¸áî 1춨μÄ
}
//¸′λDHT11
void DHT11_Rst()
{
DHT11_DQ_OUT=0; //à-μíDQ
delay_ms(20); //à-μíÖáéù18ms
DHT11_DQ_OUT=1; //DQ=1
delay(3); //Ö÷»úà-¸ß20~40us
}
//μè′yDHT11μÄ»Øó|
//·μ»Ø1:Î′¼ì2aμ½DHT11μÄ′æÔú
//·μ»Ø0:′æÔú
uint8 DHT11_Check()
{
uint8 retry=0;
while (DHT11_DQ_OUT&&retry<100)//DHT11»áà-μí40~50us
{
retry++;
_nop_();
};
if(retry>=100)return 1;
else retry=0;
while (!DHT11_DQ_OUT&&retry<100)//DHT11à-μíoó»áÔù′Îà-¸ß40~50us
{
retry++;
_nop_();
};
if(retry>=100)return 1;
return 0;
}
//DHT113õê¼»ˉ
//·μ»Ø0￡o3õê¼»ˉ3é1|￡¬1￡o꧰ü
uint8 DHT11_Init()
{
DHT11_Rst();
return DHT11_Check();
}
//′óDHT11¶áè¡ò»¸öλ
//·μ»ØÖμ￡o1/0
uint8 DHT11_Read_Bit(void)
{
uint8 retry=0;
while(DHT11_DQ_OUT&&retry<100)//μè′y±äÎaμíμçƽ 12-14us ¿aê¼
{
retry++;
_nop_();
}
retry=0;
while((!DHT11_DQ_OUT)&&retry<100)//μè′y±ä¸ßμçƽ 26-28us±íê¾0,116-118us±íê¾1
{
retry++;
_nop_();
}
delay(1);//μè′y40us
if(DHT11_DQ_OUT)return 1;
else return 0;
}
//′óDHT11¶áè¡ò»¸ö×Ö½ú
//·μ»ØÖμ￡o¶áμ½μÄêy¾Y
uint8 DHT11_Read_Byte(void)
{
uint8 i,dat=0;
for (i=0;i<8;i++)
{
dat<<=1;
dat|=DHT11_Read_Bit();
}
return dat;
}
//′óDHT11¶áè¡ò»′Îêy¾Y
//temp:ζèÖμ(·¶Î§:0~50¡ã)
//humi:êa¶èÖμ(·¶Î§:20%~90%)
//·μ»ØÖμ￡o0,Õy3￡;1,¶áè¡ê§°ü
uint8 DHT11_Read_Data(uint8 *temp,uint8 *humi)
{
uint8 buf[5];
uint8 i;
DHT11_Rst();
if(DHT11_Check()==0)
{
for(i=0;i<5;i++)//¶áè¡40λêy¾Y
{
buf[i]=DHT11_Read_Byte();
}
if((buf[0]+buf[1]+buf[2]+buf[3])==buf[4])
{
*humi=buf[0];
*temp=buf[2];
}
}else return 1;
return 0;
}
void ds18b20init() //18b20μÄ3õê¼»ˉ
{
dq=1;
delay(1);
dq=0;
delay(80);
dq=1;
delay(5);
dq=0;
delay(20);
dq=1;
delay(35);
}
void ds18b20wr(uint8 dat) //18b20D′êy¾Y
{
uint8 i;
for(i=0;i<8;i++)
{
dq=0;
dq=dat&0x01;
dat>>=1;
delay(8);//Ôúê±DòéÏÖ»óDÕaò»¿é¶Ôê±DòòaÇó×î×¼è·￡¬ËûμÄê±¼ä±ØDë′óóú15us
dq=1;
delay(1);
}
}
uint8 ds18b20rd() //18b20¶áêy¾Y
{
uint8 value,i;
for(i=0;i<8;i++)
{
dq=0;
value>>=1;
dq=1;
if(dq==1)value|=0x80;
delay(8);//ÔúÕaò»¿éò2¶Ôê±¼äòaÇóìرe×¼è·￡¬Õû¶Î3ìDò±ØDë′óóú60us
}
return value;
}
uint8 readtemp() //¶áè¡Î¶èÄúDèòa¸′λμÄ
{
uint8 b;
ds18b20init(); //3õê¼»ˉ
ds18b20wr(0xcc); //·￠ËíoöÂÔROMÖ¸áî
ds18b20wr(0x44); //·￠Ëíζè×a»»Ö¸áî
delay(100);
ds18b20init(); //3õê¼»ˉ
ds18b20wr(0xcc); //·￠ËíoöÂÔROMÖ¸áî
ds18b20wr(0xbe); //·￠¶áÔY′æÆ÷Ö¸áî
a=ds18b20rd(); //ζèμÄμí°Ëλ
b=ds18b20rd(); //ζèμĸ߰Ëλ
b<<=4; //ssss s***￡»sÎa±ê־λs=0±íê¾Î¶èÖμÎaÕyêy￡¬s=1ζèÖμÎa¸oêy
c=b&0x80; //ζèÕy¸o±ê־λè·èÏ
b+=(a&0xf0)>>4;
a=a&0x0f; //ζèμÄD¡êy2¿·Ö
return b;
}
void key_pros() //°′¼ü′|àíoˉêy
{
if(k1==0)
{
delay(1000);
if(k1==0)
{
mode++;
if(mode==5)mode=0;
wrc(0x01);
}
while(!k1);
}
if(mode==1) //¶ÔζèéÏÏTé趨
{
if(k2==0) //¼ó
{
delay(1000);
if(k2==0)
{
temph++;
if(temph>=80)temph=80;
}
while(!k2);
}
if(k3==0) //¼õ
{
delay(1000);
if(k3==0)
{
temph--;
if(temph<=0)temph=0;
}
while(!k3);
}
}
if(mode==2) //¶ÔζèÏÂÏTé趨
{
if(k2==0) //¼ó
{
delay(1000);
if(k2==0)
{
templ++;
if(templ>=80)templ=80;
}
while(!k2);
}
if(k3==0) //¼õ
{
delay(1000);
if(k3==0)
{
templ--;
if(templ<=0)templ=0;
}
while(!k3);
}
}
if(mode==3) //¶Ôêa¶èéÏÏTé趨
{
if(k2==0) //¼ó
{
delay(1000);
if(k2==0)
{
humih++;
if(humih>=80)humih=80;
}
while(!k2);
}
if(k3==0) //¼õ
{
delay(1000);
if(k3==0)
{
humih--;
if(humih<=0)humih=0;
}
while(!k3);
}
}
if(mode==4) //¶Ôêa¶èÏÂÏTé趨
{
if(k2==0) //¼ó
{
delay(1000);
if(k2==0)
{
humil++;
if(humil>=80)humil=80;
}
while(!k2);
}
if(k3==0) //¼õ
{
delay(1000);
if(k3==0)
{
humil--;
if(humil<=0)humil=0;
}
while(!k3);
}
}
}
void lcd_init_display() //LCD3õê¼»ˉÏÔê¾
{
uint8 i;
for(i=0;i<5;i++)
{
wrc(0x80+i);
wrd(str1[i]);
}
for(i=0;i<5;i++)
{
wrc(0xc0+i);
wrd(str2[i]);
}
}
void data_pros() //êy¾Y′|àíoˉêy
{
uint8 i;
uint8 temp_buf[2],humi_buf[2];
uint8 temphbuf[2],templbuf[2],humihbuf[2],humilbuf[2];
float dio;
uint16 k;
tempvalue=readtemp();
DHT11_Read_Data(&temp,&humi);
temp_buf[0]=temp/10+0x30;
temp_buf[1]=temp%10+0x30;
humi_buf[0]=humi/10+0x30;
humi_buf[1]=humi%10+0x30;
dio=a*0.0625;
k=dio*10000;//è¡D¡êyμãoóá½Î»óDD§êy×Ö
temphbuf[0]=temph/10+0x30;
temphbuf[1]=temph%10+0x30;
templbuf[0]=templ/10+0x30;
templbuf[1]=templ%10+0x30;
humihbuf[0]=humih/10+0x30;
humihbuf[1]=humih%10+0x30;
humilbuf[0]=humil/10+0x30;
humilbuf[1]=humil%10+0x30;
if(mode==0)
{
lcd_init_display();
wrc(0x85);
wrd(num[tempvalue%100/10]);
wrd(num[tempvalue%100%10]);
wrd('.');
wrd(num[k/1000]);
wrd(0xdf);
wrd('C');
for(i=0;i<2;i++)
{
wrc(0Xc5+i);
wrd(humi_buf[i]);
}
for(i=0;i<3;i++)
{
wrc(0Xc7+i);
wrd(str5[i]);
}
}
if(mode==1) //ζèéÏÏTÏÔê¾
{
wrc(0x80);
for(i=0;i<6;i++)
{
wrd(str6[i]);
}
wrd(temphbuf[0]);
wrd(temphbuf[1]);
}
if(mode==2) //ζèÏÂÏTÏÔê¾
{
wrc(0x80);
for(i=0;i<6;i++)
{
wrd(str7[i]);
}
wrd(templbuf[0]);
wrd(templbuf[1]);
}
if(mode==3) //êa¶èéÏÏTÏÔê¾
{
wrc(0x80);
for(i=0;i<6;i++)
{
wrd(str8[i]);
}
wrd(humihbuf[0]);
wrd(humihbuf[1]);
}
if(mode==4) //êa¶èÏÂÏTÏÔê¾
{
wrc(0x80);
for(i=0;i<6;i++)
{
wrd(str9[i]);
}
wrd(humilbuf[0]);
wrd(humilbuf[1]);
}
}
void baojinpros() //±¨¾ˉ′|àí
{
if(tempvalue>=temph||humi>=humih) //¼ì2aζè»òÕßêa¶è¸ßóúé趨éÏÏTÖμ ½μÎÂêa
{
led1=1; //½μÎÂêaÖ¸ê¾μÆ
led2=0;
}
if(tempvalue<=templ||humi<=humil) //¼ì2aζè»òÕßêa¶èμíóúé趨ÏÂÏTÖμ éyÎÂêa
{
led1=0;
led2=1; //éy¸ßÎÂêaÖ¸ê¾μÆ
}
if((tempvalue>templ&&tempvalue<temph)&&(humi>humil&&humi<humih))
{
led1=0;
led2=0;
}
}
void main()
{
uint8 i=0;
led1=0;
led2=0;
lcd_init();
while(DHT11_Init()) //¼ì2aDHT11êÇ·ñ′¿Ôú
{
for(i=0;i<5;i++)
{
wrc(0x80+i);
wrd(str3[i]);
}
}
wrc(0x01);
lcd_init_display(); //LCD3õê¼»ˉÏÔê¾
i=0;
while(1)
{
i++;
key_pros();
baojinpros(); //±¨¾ˉ′|àí
if(i==15)
{
i=0;
data_pros(); //¶áè¡ò»′ÎDHT11êy¾Y×îéùòa′óóú100ms
}
delay(1000);
}
}
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