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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