Membuat Frequency dan Duty Cycle PWM Adjustable 0 - 40KHz Menggunakan Code Vision AVR (CV AVR)

Membuat Frequency dan Duty Cycle PWM Generator Adjustable 0 - 40KHz Menggunakan Code Vision AVR (CV AVR)

            Pada kesempatan yang berbahagia kali ini saya akan menjelaskan mengenai bagaimana cara membuat alat yang mana alat tersebut bisa menghasilkan frequency dan duty cycle yang dapat diatur sesuai keinginan, pada alat ini tersetting frequemcy 40KHz dengan Duty Cycle bisa diatur menggunakan Potensiometer. alat ini diaplikasikan untuk rangkaian buck dan boost converter yang mana membutuhkan frequency sinyal kotak tertentu dan duty cycle tertenu juga. untuk lebih jelasnya berikut adalah skema dan programnya.

a. Minimum System ATMega16

b. Potensiometer

c. Program CV AVR (Code Vision AVR)

/*****************************************************
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    : 7/20/2016
Author  : tyery08
Company : embeeminded.blogspot.com
Comments:


Chip type               : ATmega8535
Program type            : Application
AVR Core Clock frequency: 16.000000 MHz
Memory model            : Small
External RAM size       : 0
Data Stack size         : 128
*****************************************************/

#include <mega16.h>
#include <stdlib.h>
#include <delay.h>
#include <math.h>
// Standard Input/Output functions
#include <stdio.h>

// Alphanumeric LCD functions
#include <alcd.h>

#define ADC_VREF_TYPE 0x40

// Read the AD conversion result
unsigned int read_adc(unsigned char adc_input)
{
ADMUX=adc_input | (ADC_VREF_TYPE & 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 & 0x10)==0);
ADCSRA|=0x10;
return ADCW;
}

// Declare your global variables here
// Declare your global variables here
unsigned char buffer[32];
unsigned int inADC17, inADC24, outADC, arusout;
unsigned int dutyc;
float ainx, aoutx, voutx, vin, ain, arusin, aout, vin1, dayain, dayain1, slope;
float dc17, dc24, ft17, ft24, ftOut;  

float dayain;
 
char temp[10];
char temp1[10];
char temp2[10];
char temp3[10];
char temp4[10];



void main(void)
{

// Declare your local variables here
unsigned char i;
// 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=Out Func6=Out Func5=Out Func4=Out Func3=Out Func2=Out Func1=Out Func0=Out
// State7=0 State6=0 State5=0 State4=0 State3=0 State2=0 State1=0 State0=0
PORTC=0x00;
DDRC=0xFF;

// Port D initialization
// Func7=In Func6=In Func5=Out Func4=Out Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=0 State4=0 State3=T State2=T State1=T State0=T
PORTD=0x00;
DDRD=0x30;

// 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: 16000.000 kHz
// Mode: Fast PWM top=ICR1
// OC1A output: Inverted
// OC1B output: Inverted
// 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=0xA2;
TCCR1B=0x19;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x01;
ICR1L=0x90;
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 Clock frequency: 125.000 kHz
// ADC Voltage Reference: AVCC pin
// ADC High Speed Mode: Off
// ADC Auto Trigger Source: Free Running
ADMUX=ADC_VREF_TYPE & 0xff;
ADCSRA=0xA7;
SFIOR&=0x0F;

// SPI initialization
// SPI disabled
SPCR=0x00;

// TWI initialization
// TWI disabled
TWCR=0x00;

// Alphanumeric LCD initialization
// Connections are specified in the
// Project|Configure|C Compiler|Libraries|Alphanumeric LCD menu:
// RS - PORTC Bit 7
// RD - PORTC Bit 6
// EN - PORTC Bit 5
// D4 - PORTC Bit 3
// D5 - PORTC Bit 2
// D6 - PORTC Bit 1
// D7 - PORTC Bit 0
// Characters/line: 16
lcd_init(16);

while (1)
      {
  
      // (optional) 400 adalah nilai maksimal pwm==100%
     
//    OCR1A=in17;
      OCR1B=inADC17;
//    OCR1B=dutyc;         
      delay_ms(200);
      OCR1A=0;
      OCR1B=0;
      delay_ms(1);     
    
    
      inADC17=read_adc(7);
      vin = (inADC17 * 5.0)/1023.0; 
                   
      ftoa(vin,1,temp);    
      lcd_gotoxy (0,0);
      lcd_putsf("V= ");
      lcd_puts(temp);

      arusin=read_adc(4);
     
      ain = (arusin * 5.0)/1023.0;
      ainx = (ain - 2.5)/0.1;
     
      ftoa(ainx,1,temp1);    
      lcd_gotoxy (0,1);
      lcd_putsf("Ai=");
      lcd_puts(temp1);

      arusout=read_adc(6);
     
      aout = (arusout * 5.0)/1023.0;
      aoutx = (aout -2.5)/0.1;
 
//      ftoa(aoutx,1,temp2);    
//      lcd_gotoxy (8,1);
//      lcd_putsf("A0=");
//      lcd_puts(temp2);
     
      ftoa(dayain,1,temp3);    
      lcd_gotoxy (8,1);
      lcd_putsf("P=");
      lcd_puts(temp3);
 
      ftoa(slope,1,temp4);    
      lcd_gotoxy (8,0);
      lcd_putsf("S=");
      lcd_puts(temp4);
 
      dayain = ainx * vin;
    
      slope = (dayain - dayain1) / (vin - vin1);
     
      if (slope > 0) {
       //dutyc = dutyc + 5;
      }
      if (slope < 0) {
       //dutyc = dutyc - 5;
      }
     
      dayain1 = dayain;
      vin1 = vin;

    
      }
}

d. Gambar Hasilnya