Program Pengukuran Suhu dengan CodeVisionAVR

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

This program was produced by the

CodeWizardAVR V1.25.9 Evaluation

Automatic Program Generator

© Copyright 1998-2008 Pavel Haiduc, HP InfoTech s.r.l.

http://www.hpinfotech.com

Project :

Version :

Date : 2/7/2010

Author : Freeware, for evaluation and non-commercial use only

Company :

Comments:

Chip type : ATmega8535L

Program type : Application

Clock frequency : 8.000000 MHz

Memory model : Small

External SRAM size : 0

Data Stack size : 128

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

#include <mega8535.h>

#include <stdio.h>

// Alphanumeric LCD Module functions

#asm

.equ __lcd_port=0x15 ;PORTC //LCD diPORTC

#endasm

#include <delay.h>

#include <lcd.h>

#define ADC_VREF_TYPE 0x60

#define alarm PORTB.0 //alarm di hubungkan dg PORTB.0

// Read the 8 most significant bits

// of the AD conversion result

unsigned char read_adc(unsigned char adc_input)

{

ADMUX=adc_input | (ADC_VREF_TYPE &amp; 0xff);

// Delay needed for the stabilization of the ADC input voltage

delay_us(10);

// Start the AD conversion

ADCSRA|=0x40;

// Wait for the AD conversion to complete

while ((ADCSRA &amp; 0x10)==0);

ADCSRA|=0x10;

return ADCH; //resolusi 8 bit

}

// Declare your global variables here

unsigned char meri[33];

void lcd(unsigned int dat) //subfungsi LCD

{

sprintf(meri,"%d ",dat);

lcd_puts(meri);

}

void main(void)

{

// Declare your local variables here

unsigned int suhu;

float adc;

// 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

PORTA=0x00;

DDRA=0x00;

// 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=FFh

// OC0 output: Disconnected

TCCR0=0x00;

TCNT0=0x00;

OCR0=0x00;

// Timer/Counter 1 initialization

// Clock source: System Clock

// Clock value: Timer 1 Stopped

// Mode: Normal top=FFFFh

// OC1A output: Discon.

// OC1B output: Discon.

// Noise Canceler: Off

// Input Capture on Falling Edge

// Timer 1 Overflow Interrupt: Off

// Input Capture Interrupt: Off

// Compare A Match Interrupt: Off

// Compare B Match Interrupt: Off

TCCR1A=0x00;

TCCR1B=0x00;

TCNT1H=0x00;

TCNT1L=0x00;

ICR1H=0x00;

ICR1L=0x00;

OCR1AH=0x00;

OCR1AL=0x00;

OCR1BH=0x00;

OCR1BL=0x00;

// Timer/Counter 2 initialization

// Clock source: System Clock

// Clock value: Timer 2 Stopped

// Mode: Normal top=FFh

// 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;

// Analog Comparator initialization

// Analog Comparator: Off

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

ACSR=0x80;

SFIOR=0x00;

// ADC initialization

// ADC Clock frequency: 1000.000 kHz

// ADC Voltage Reference: AVCC pin //Tegangan referensi AVCC=5 volt

// ADC High Speed Mode: Off

// ADC Auto Trigger Source: None

// Only the 8 most significant bits of

// the AD conversion result are used

ADMUX=ADC_VREF_TYPE &amp; 0xff;

ADCSRA=0x83;

SFIOR&amp;=0xEF;

// LCD module initialization

lcd_init(16);

while (1)

{

// Place your code here

adc = read_adc(0); //output LM35 dihubungkan di PINA.0

suhu=adc*1.961; //perhitungan suhu

if (suhu&lt;27&amp;&amp;suhu&gt;33)

{ //jika suhu dibawah 27 derajat diatas 32 derajat celcius

alarm=1; // maka alarm hidup

}

Else //jika suhu normal

{

alarm=0; // maka alarm mati

}

lcd_putsf("Suhu sekarang adalah= ");

lcd(suhu); //pemanggilan subfungsi lcd

delay_ms(1000); //waktu tunda 1000 ms

lcd_clear(); //layar lcd dibersihlkan

};

}