给我写一个驱动dht11.的c语言程序

#include <stdio.h>
#include <wiringPi.h> #define DHT11PIN 7 int dht11_val[5]={0,0,0,0,0}; void dht11_read_val()
{
uint8_t lststate=HIGH;
uint8_t counter=0;
uint8_t j=0,i;
float farenheit;
for(i=0;i<5;i++)
dht11_val[i]=0;
pinMode(DHT11PIN,OUTPUT);
digitalWrite(DHT11PIN,LOW);
delay(18);
digitalWrite(DHT11PIN,HIGH);
delayMicroseconds(40);
pinMode(DHT11PIN,INPUT);
for(i=0;i<MAX_TIME;i++)
{
counter=0;
while(digitalRead(DHT11PIN)==lststate){
counter++;
delayMicroseconds(1);
if(counter==255)
break;
}
lststate=digitalRead(DHT11PIN);
if(counter==255)
break;
// top 3 transistions are ignored
if((i>=4)&&(i%2==0)){
dht11_val[j/8]<<=1;
if(counter>16)
dht11_val[j/8]|=1;
j++;
}
}
} int main(void)
{
printf("Interfacing Temperature and Humidity Sensor (DHT11) With Raspberry Pi\n");
if(wiringPiSetup()==-1)
exit(1);
while(1)
{
dht11_read_val();
printf("Humidity = %d.%d %% Temperature = %d.%d *C \n",dht11_val[0],dht11_val[1],dht11_val[2],dht11_val[3]);
}
return 0;
}答：我已经为您编写了一个驱动DHT11的c语言程序，请参考以下代码：