پروژه راه اندازی سنسور دما و رطوبت DHT22 با استفاده از مجموعه آموزشی AVR WIZARD توسط برد پلاریس به زبان C

				
					 
#include <mega16a.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <delay.h>
#include <alcd.h>
#include "DHT22.h"
// Declare your global variables here
 
void main(void)
{
float temperature,humidity;
char str[10],temp[10],hum[10];
lcd_init(16);
// Declare your local variables here
 
// Input/Output Ports initialization
// Port A initialization
// Function: Bit7=In Bit6=In Bit5=In Bit4=In Bit3=In Bit2=In Bit1=In Bit0=In 
DDRA=(0<<DDA7) | (0<<DDA6) | (0<<DDA5) | (0<<DDA4) | (0<<DDA3) | (0<<DDA2) | (0<<DDA1) | (0<<DDA0);
// State: Bit7=T Bit6=T Bit5=T Bit4=T Bit3=T Bit2=T Bit1=T Bit0=T 
PORTA=(0<<PORTA7) | (0<<PORTA6) | (0<<PORTA5) | (0<<PORTA4) | (0<<PORTA3) | (0<<PORTA2) | (0<<PORTA1) | (0<<PORTA0);
 
// Port B initialization
// Function: Bit7=In Bit6=In Bit5=In Bit4=In Bit3=In Bit2=In Bit1=In Bit0=In 
DDRB=(0<<DDB7) | (0<<DDB6) | (1<<DDB5) | (0<<DDB4) | (0<<DDB3) | (0<<DDB2) | (0<<DDB1) | (0<<DDB0);
// State: Bit7=T Bit6=T Bit5=T Bit4=T Bit3=T Bit2=T Bit1=T Bit0=T 
PORTB=(0<<PORTB7) | (0<<PORTB6) | (0<<PORTB5) | (0<<PORTB4) | (0<<PORTB3) | (0<<PORTB2) | (0<<PORTB1) | (0<<PORTB0);
 
// Port C initialization
// Function: Bit7=In Bit6=In Bit5=In Bit4=In Bit3=In Bit2=In Bit1=In Bit0=In 
DDRC=(1<<DDC7) | (1<<DDC6) | (1<<DDC5) | (0<<DDC4) | (0<<DDC3) | (0<<DDC2) | (0<<DDC1) | (0<<DDC0);
// State: Bit7=T Bit6=T Bit5=T Bit4=T Bit3=T Bit2=T Bit1=T Bit0=T 
PORTC=(0<<PORTC7) | (0<<PORTC6) | (0<<PORTC5) | (0<<PORTC4) | (0<<PORTC3) | (0<<PORTC2) | (0<<PORTC1) | (0<<PORTC0);
 
// Port D initialization
// Function: Bit7=In Bit6=In Bit5=In Bit4=In Bit3=In Bit2=In Bit1=In Bit0=In 
DDRD=(0<<DDD7) | (0<<DDD6) | (1<<DDD5) | (0<<DDD4) | (0<<DDD3) | (0<<DDD2) | (0<<DDD1) | (0<<DDD0);
// State: Bit7=T Bit6=T Bit5=T Bit4=T Bit3=T Bit2=T Bit1=T Bit0=T 
PORTD=(0<<PORTD7) | (0<<PORTD6) | (0<<PORTD5) | (0<<PORTD4) | (0<<PORTD3) | (0<<PORTD2) | (0<<PORTD1) | (0<<PORTD0);
lcd_init(16);
lcd_putsf( "   HI Wellcom   " ) ;
lcd_putsf( "TO REDRONIC.COM" ) ;
delay_ms(2000);
lcd_clear();
// Global enable interrupts
#asm("sei")
while (1)
      {           
        lcd_putsf("www.redronic.com");
        if(dht22_read(&temperature,&humidity) == -40) 
          {
          lcd_putsf("DHT22  ERROR");
          }
       else     
          {
            ftoa(temperature,1,temp);                 
            ftoa(humidity,1,hum); 
            lcd_gotoxy(0,1); 
            sprintf(str,"Tmp=%sHum=%s %",temp,hum);      // cast temprature and humidity value to char
           // lcd_clear();                                                      
            //lcd_gotoxy(0,0); 
            lcd_puts(str);       
          }
      if(temperature>38)           //if temp goes higher than 38 the buzzer and relay will be on
          {
           PORTC.7=1;   
            PORTC.6=1;
            PORTD.5= 1;
          }  
          else
          { 
            PORTC.7=0; 
            PORTC.6=0;
            PORTD.5= 0;
          }   
           if(humidity>50)            //if humidity goes higher than 50 the buzzer and relay will be on
          {
           PORTC.7=1;
            PORTC.5=1; 
            PORTB.5= 1;
          }  
          else
          { 
             PORTC.7=0;  
             PORTC.5=0; 
             PORTB.5= 0;
          }           
        delay_ms(2000);  
      }        }