Atmega16 / Atmega32, Tutorial Mengakses DHT11 dan LCD I2C 16×2

pada kesempatan kali ini saya akan menulis artikel tentang Atmega16 / Atmega32, Tutorial Mengakses DHT11 dan LCD I2C 16×2

sebelumnya juga saya sudah menulis Artikel yang berikaitan dengan CVAVR dan DHT11,

namun hanya di tampilkan pada LCD 16×2 tanpa komunikasi I2C, silahkan baca artikelnya Tutorial Mengakses DHT11 dengan CVAVR Atmega 16 / 32 

dan sekarang saya akan menulis tentang tutorial Atmega16 / 32 untuk mengakses DHT11 dan ditampilkan pada LCD i2c 16×2

terlebih dahulu silahkan download library i2c lcd CVAVR di artikel Tutorial Mengakses LCD I2C 16×2 dengan CVAVR

Keyword :

Tutorial CVAVR DHT11

DHT11 Atmega16

DHT11 Atmega32

DHT11 Atmega LCD I2C

Cara Mengakses DHT11 CVAVR

berikut adalah skema rangkaian yang saya gunakan.

pin DATA  DHT11   —-  PORTA.0 Atmega32/16

pin GND  DHT11     —-  GND  Atmega32/16

pin VCC  DHT11     —-  5V    Atmega32/16

pin SDA I2C_LCD   —- PORTC.1 Atmega32/16

pin SCL I2C_LCD   —- PORTC.0 Atmega32/16

pin GND I2C_LCD  —- GND Atmega32/16

pin 5V I2C_LCD      —- 5V Atmega32/16

kemudian buatlah program seperti berikut ini :

/*****************************************************

This program was produced by the

CodeWizardAVR V2.05.3 Standard

Automatic Program Generator

© Copyright 1998-2011 Pavel Haiduc, HP InfoTech s.r.l.

http://www.hpinfotech.com

Project :

Version :

Date    : 11/7/2018

Author  : Chaerul Anam

Company : Unisi Robotik

Comments:

Chip type               : ATmega32

Program type            : Application

AVR Core Clock frequency: 16.000000 MHz

Memory model            : Small

External RAM size       : 0

Data Stack size         : 512

*****************************************************/

#include <mega32.h>

#include <lcd_i2c_cvavr.h>

#include <delay.h>

#include <stdio.h>

#include <stdint.h>

#include <stdlib.h>

// Declare your global variables here

#define PIN_DHT11 0

char buff[10];

uint8_t c=0, I_RH, D_RH, I_TEMP, D_TEMP, CheckSum;

int i;

void Req()

{

DDRA |= (1<<PIN_DHT11);

PORTA &= ~(1<<PIN_DHT11);

delay_ms(20);

PORTA |= (1<<PIN_DHT11);

}

void Resp()

{

DDRA &= ~(1<<PIN_DHT11);

while(PINA & (1<<PIN_DHT11));

while((PINA & (1<<PIN_DHT11))==0);

while(PINA & (1<<PIN_DHT11));

}

uint8_t receive_data()

{

    for (i=0; i<8; i++){

        while ((PINA & (1<<PIN_DHT11))== 0);

        delay_us(30);

        if (PINA & (1<<PIN_DHT11))

        c=(c<<1)|(0x01);

     

        else

        c=(c<<1);

     

        while(PINA & (1<<PIN_DHT11));

        }

        return c;

    } 

 

void baca_dht(){

Req();

Resp();

I_RH = receive_data();

D_RH=receive_data();

I_TEMP=receive_data();

D_TEMP=receive_data();

CheckSum =receive_data();

}

 

void main(void)

{

// Declare your local variables here

// Input/Output Ports initialization

// Port A initialization

// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In

// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T

// Port B initialization

// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In

// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T

PORTB=0x00;

DDRB=0x00;

// Port C initialization

// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In

// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T

PORTC=0x00;

DDRC=0x00;

// Port D initialization

// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In

// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T

PORTD=0x00;

DDRD=0x00;

// Timer/Counter 0 initialization

// Clock source: System Clock

// Clock value: Timer 0 Stopped

// Mode: Normal top=0xFF

// OC0 output: Disconnected

TCCR0=0x00;

TCNT0=0x00;

OCR0=0x00;

// Timer/Counter 1 initialization

// Clock source: System Clock

// Clock value: Timer1 Stopped

// Mode: Normal top=0xFFFF

// OC1A output: Discon.

// OC1B output: Discon.

// Noise Canceler: Off

// Input Capture on Falling Edge

// Timer1 Overflow Interrupt: Off

// Input Capture Interrupt: Off

// Compare A Match Interrupt: Off

// Compare B Match Interrupt: Off

TCCR1A=0x00;

TCCR1B=0x05;

TCNT1H=0xC2;

TCNT1L=0xF7;

ICR1H=0x00;

ICR1L=0x00;

OCR1AH=0x00;

OCR1AL=0x00;

OCR1BH=0x00;

OCR1BL=0x00;

// Timer/Counter 2 initialization

// Clock source: System Clock

// Clock value: Timer2 Stopped

// Mode: Normal top=0xFF

// OC2 output: Disconnected

ASSR=0x00;

TCCR2=0x00;

TCNT2=0x00;

OCR2=0x00;

// External Interrupt(s) initialization

// INT0: Off

// INT1: Off

// INT2: Off

MCUCR=0x00;

MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization

TIMSK=0x00;

// USART initialization

// USART disabled

UCSRB=0x00;

// Analog Comparator initialization

// Analog Comparator: Off

// Analog Comparator Input Capture by Timer/Counter 1: Off

ACSR=0x80;

SFIOR=0x00;

// ADC initialization

// ADC disabled

ADCSRA=0x00;

// SPI initialization

// SPI disabled

SPCR=0x00;

// TWI initialization

// TWI disabled

TWCR=0x00;

lcd_clear();

lcd_begin(0x3F, 16,2);

            lcd_clear();

            lcd_gotoxy(0,0);

            lcd_print(“Humidity : “);

            lcd_gotoxy(0,1);

            lcd_print(“Temp : “);

while (1)

      {

      // Place your code here

 baca_dht();             

       lcd_clear(); 

   

            lcd_gotoxy(0,0);

            lcd_print(“Humidity : “);

            lcd_gotoxy(0,1);

            lcd_print(“Temp : “); 

         

      if ((I_RH + D_RH + I_TEMP + D_TEMP) != CheckSum){

      lcd_gotoxy (0,0);

      lcd_print(“error”);

      }

   

     else {

 itoa(I_RH,buff);

   lcd_gotoxy(11,0);

   lcd_print(buff);

   lcd_print(“.”);

 

   itoa(D_RH,buff);

   lcd_print(buff);

   lcd_print(“%”);

   itoa(I_TEMP,buff);

   lcd_gotoxy(6,1);

   lcd_print(buff);

   lcd_print(“.”);

 

   itoa(D_TEMP,buff);

   lcd_print(buff);

   lcd_print(“C “);

 

   itoa(CheckSum,buff);

   lcd_print(buff);

   lcd_print(” “);

            }

            delay_ms(10);

        }

     }

DOWNLOAD FILE PROJECT CODE CVAVR

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