Saudara satu guru satu ilmu... mohon pencerahannya donk.
Ane mau nanya nih... Ane lagi bikin alat sensor nitrat yang nampilin kadar nitrat di LCD 2x16, pake MK atmega8 jadi ADC+Driver LCDnya... tapi apakah yang terjadi?? LCD nyala tapi cuman backlightnya aja, kagak nongol tulisannya... kira kira yang salah apanya ya bro? software-nya apa rangkaiannya?
ane pusing banget nih... mana deadline tinggal 2 minggu alat masih gak beres2 juga... mohon pencerahannya...

thanks...
ane kasih rangkaianMK + listing programnya (CVAVR) barangkali ada yang bisa bantu analisa...
Gambar rangkaian MK-nya
pin-pin di header pin (JP)
JP4.1 => BLK (Backlight katoda) <Ground>
JP4.2 => VSS <Ground>
JP4.3 => Vo
JP4.4 => VDD <voltage=+5V)
JP4.5 => BLA (Backlight anoda)
JP3.1 => RS
JP3.2 => R/W
JP3.3 => E
JP3.4 => D4
JP3.5 => D5
JP3.6 => D6
JP3.7 => D7
Listingnya#include <mega8.h>
#include <stdio.h>
#include <delay.h>
// Alphanumeric LCD Module functions
#asm
.equ __lcd_port=0x18 ;PORTB
#endasm
#include <lcd.h>
#define ADC_VREF_TYPE 0x20
// ADC interrupt service routine
int kadar_nitrat;
char adc_data;
interrupt [ADC_INT] void adc_isr(void)
{
// Read the 8 most significant bits
// of the AD conversion result
ADCSRA.6=0;
ADCSRA.7=0;
adc_data=ADCH;
ADCSRA.6=1;
ADCSRA.7=1;
kadar_nitrat=(adc_data/80)*1000;
// Place your code here
}
// Declare your global variables here
void main(void)
{
char kadar[16];
// Declare your local variables here
// Input/Output Ports initialization
// Port B 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
PORTB=0x00;
DDRB=0xFF;
// Port C initialization
// Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// 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
TCCR0=0x00;
TCNT0=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
MCUCR=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: AREF pin
// Only the 8 most significant bits of
// the AD conversion result are used
ADMUX=ADC_VREF_TYPE;
ADCSRA=0x8A;
// LCD module initialization
lcd_init(16);
// Global enable interrupts
#asm("sei")
while (1)
{
// Place your code here
lcd_clear();
lcd_gotoxy(0,1);
lcd_putsf("Nama Ane");
lcd_gotoxy(1,3);
lcd_putsf("NIM Ane");
delay_ms(2000);
start:
lcd_clear();
lcd_gotoxy(0,0);
lcd_putsf("Kadar Nitrat= ");
lcd_gotoxy(1,0);
sprintf(kadar," %d mikromolar",kadar_nitrat);
lcd_puts(kadar);
delay_ms(500);
goto start;
};
}
Sekali lagi mohon bantuannya...
