마이크로프로세서 HOT입력 캡쳐 인터럽트 좀 도와주세요~

#include <avr/io.h>
#include <util/delay.h>
#include <avr/signal.h>
#include <avr/interrupt.h>

typedef unsigned char UCHAR;
typedef unsigned short USHORT;
typedef unsigned long ULONG;

USHORT Time; // 카운터 Ref
int main(void)
{
 DDRB = 0xff;
 

 TIMSK = _BV(TICIE1);
 TCCR1A = _BV(COM1A0); // OC1A Toggle
 TCCR1B = _BV(WGM12)|_BV(CS10);  // CTC, 4MODE, 8 divide
 Time = 999; //
 TCNT1 = 0;

 OCR1AH = (Time & 0xff00) >> 8; //
 OCR1AL = Time & 0x0ff; //

 ETIMSK = _BV(TICIE3);
 TCCR3A = _BV(COM3A0); // OC3A Toggle
 TCCR3B = _BV(WGM32)|_BV(CS30);// CTC, 4MODE, 8 divide
 Time = 999; //
 TCNT3 = 0;

 OCR3AH = (Time & 0xff00) >> 8; //
 OCR3AL = Time & 0x0ff; //

 SREG |= 0x80;

 while(1);
}

SIGNAL(SIG_INPUT_CAPTURE3)
{

}

SIGNAL(SIG_INPUT_CAPTURE1)
{

}