attiny13 사용중이고 2번 포트로 신호를 받아서 3, 4번 포트에서 출력이 나오게 할려구 합니다

AD변환된 데이터로 일정이상의 신호가 들어올때 작동하고 그외에는 평소대로 작동하게

if 구문으로 만들엇는데 뭐가 잘못됏는지 신호를 주지 않아도 계속 신호가 들어올 때의 동작만 합니다

아래에 코딩 붙였는데 어디가 틀렷는지랑 어떻게 해야되는지 좀 가르켜 주세요


/*****************************************************
This program was produced by the
CodeWizardAVR V1.24.7e Professional
Automatic Program Generator
?Copyright 1998-2005 Pavel Haiduc, HP InfoTech s.r.l.
http://www.hpinfotech.com
e-mail:office@hpinfotech.com

Project :
Version :
Date    : 2009-05-25
Author  : F4CG                           
Company : F4CG                           
Comments:

Chip type           : ATtiny13
Clock frequency     : 10.000000 MHz
Memory model        : Tiny
External SRAM size  : 0
Data Stack size     : 16
*****************************************************/

#include <tiny13.h>
#include <delay.h>

#define FIRST_ADC_INPUT 0
#define LAST_ADC_INPUT 0
unsigned char adc_data[LAST_ADC_INPUT-FIRST_ADC_INPUT+1];
#define ADC_VREF_TYPE 0x20

// ADC interrupt service routine
// with auto input scanning
interrupt [ADC_INT] void adc_isr(void)
{
register static unsigned char input_index=0;
// Read the 8 most significant bits
// of the AD conversion result
adc_data[input_index]=ADCH;
// Select next ADC input
if (++input_index > (LAST_ADC_INPUT-FIRST_ADC_INPUT))
   input_index=0;
ADMUX=(FIRST_ADC_INPUT|ADC_VREF_TYPE)+input_index;
// Start the AD conversion
ADCSRA|=0x40;
}

// Declare your global variables here

void main(void)
{
// Declare your local variables here

// Crystal Oscillator division factor: 1
#pragma optsize-
CLKPR=0x80;
CLKPR=0x00;
#ifdef _OPTIMIZE_SIZE_
#pragma optsize+
#endif

// Input/Output Ports initialization
// Port B initialization
// Func5=Out Func4=Out Func3=Out Func2=In Func1=Out Func0=Out
// State5=0 State4=0 State3=0 State2=T State1=0 State0=0
PORTB=0x00;
DDRB=0x3B;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=FFh
// OC0A output: Disconnected
// OC0B output: Disconnected
TCCR0A=0x00;
TCCR0B=0x00;
TCNT0=0x00;
OCR0A=0x00;
OCR0B=0x00;

// External Interrupt(s) initialization
// INT0: Off
// Interrupt on any change on pins PCINT0-5: Off
GIMSK=0x00;
MCUCR=0x00;

// Timer/Counter 0 Interrupt(s) initialization
TIMSK0=0x00;

// Analog Comparator initialization
// Analog Comparator: Off
ACSR=0x80;
ADCSRB=0x00;

// ADC initialization
// ADC Clock frequency: 625.000 kHz
// ADC Bandgap Voltage Reference: Off
// ADC Auto Trigger Source: None
// Only the 8 most significant bits of
// the AD conversion result are used
// Digital input buffers on ADC0: On, ADC1: On, ADC2: On, ADC3: On
// ADC4: On
DIDR0=0x00;
ADMUX=FIRST_ADC_INPUT|ADC_VREF_TYPE;
ADCSRA=0xCC;

// Global enable interrupts
#asm("sei")

while (1)
      {
      // Place your code here
      if(adc_data[0]>100)
      {
      PORTB.3=0;
      PORTB.4=0;
      delay_ms(80);
      PORTB.3=0;
      PORTB.4=1;
`     delay_ms(80);
      }
      else
      {
      PORTB.3=0;
      PORTB.4=1;
      delay_ms(80);
      PORTB.3=1;
      PORTB.4=0;
      delay_ms(80);
      }
         
};
}