各位大神,谁能帮我把这段代码写成nodejs版的啊,谢谢啦
/*
* dht11.c:
* Simple test program to test the wiringPi functions
* DHT11 test
*/
#include <wiringPi.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#define MAXTIMINGS 85
#define DHTPIN 7
int dht11_dat[5] = {0,0,0,0,0};
void read_dht11_dat()
{
uint8_t laststate = HIGH;
uint8_t counter = 0;
uint8_t j = 0, i;
float f; // fahrenheit
dht11_dat[0] = dht11_dat[1] = dht11_dat[2] = dht11_dat[3] = dht11_dat[4] = 0;
// pull pin down for 18 milliseconds
pinMode(DHTPIN, OUTPUT);
digitalWrite(DHTPIN, LOW);
delay(18);
// then pull it up for 40 microseconds
digitalWrite(DHTPIN, HIGH);
delayMicroseconds(40);
// prepare to read the pin
pinMode(DHTPIN, INPUT);
// detect change and read data
for ( i=0; i< MAXTIMINGS; i++) {
counter = 0;
while (digitalRead(DHTPIN) == laststate) {
counter++;
delayMicroseconds(1);
if (counter == 255) {
break;
}
}
laststate = digitalRead(DHTPIN);
if (counter == 255) break;
// ignore first 3 transitions
if ((i >= 4) && (i%2 == 0)) {
// shove each bit into the storage bytes
dht11_dat[j/8] <<= 1;
if (counter > 16)
dht11_dat[j/8] |= 1;
j++;
}
}
// check we read 40 bits (8bit x 5 ) + verify checksum in the last byte
// print it out if data is good
if ((j >= 40) &&
(dht11_dat[4] == ((dht11_dat[0] + dht11_dat[1] + dht11_dat[2] + dht11_dat[3]) & 0xFF)) ) {
f = dht11_dat[2] * 9. / 5. + 32;
printf("Humidity = %d.%d %% Temperature = %d.%d *C (%.1f *F)\n",
dht11_dat[0], dht11_dat[1], dht11_dat[2], dht11_dat[3], f);
}
else
{
printf("Data not good, skip\n");
}
}
int main (void)
{
printf ("Raspberry Pi wiringPi DHT11 Temperature test program\n") ;
if (wiringPiSetup () == -1)
exit (1) ;
while (1)
{
read_dht11_dat();
delay(1000); // wait 1sec to refresh
}
return 0 ;
}