电子设计与单片机应用实训教程代码第十七章.pdf

1:模拟智能温室(单片机):

#includereg52.h//主函数

#defineuintunsignedint

#defineucharunsignedchar

sbitlight=P3^4;//光敏元件，亮度大于一定程度为0;

sbitdht_scl=P3^5;//温湿度传感器

sbitdht_sda=P3^6;

sbitrain=P3^3;//雨滴传感器

sbitstress=P3^2;//压力传感器

sbitpwm=P1^0;//pwm电动机

sbitmotorl=P1^1;//电动机正向

sbitmotor2=P1^2;//电动机反向

sbitled=P1^3;//灯

uchartem,hum,ins;/*tem:温度，hum:湿度，ins:指令，ste:

舵机中断用计次fre外部中断命令*/

uintste,fre;

uintx,y,z:

voiddelay(uintxms)//延时

uinti,j;

for(i=xms;i0;i--)

for(j=110:j0:j--);

}

voiddelayum()//微秒级延时

{;;}

voidiic_start)/fic开始

dht_sda=1;

delayum();

dht_scl=1;

delayum();

dht_sda=0;

delayum();

}

voidiic_respons()//iic响应

ucharj=0:

dhtscl=1:

delayum();

while((dht_sda==1)(i255))

{

i++;

dht_scl=0

delayum();

}

}

voidiic_stopO/fic停止

{

dht_sda=0;

delayum();

dht_scl=1;

delayum();

dht_sda=1;

delayum();

-

uchariic_read0//iic读

{

uchari,date;

dht_scl=0;

delayum();

dht_sda=1;

for(i=0;i8;i++)

{

dht_scl=1;

delayum();

date=(date1)|dht_sda;

}

delayum();

returndate;

}

voidiic_write(uchardate)//iic写

{

uchari,com;

com=date;

for(i=0;i8;i++)

{

com=com1;

dht_scl=0;

delayum();

dht_sda=CY;

delayum();

dht_scl=1;

delayum();

}

dht_scl=0;