수다닷컴

순서도작성 좀 도와주세요..질문 내용 :
#include avr/io.h
#include avr/interrupt.h
#include timer0.h
#include seg.h

unsigned short inumber=0;

signal(sig_output_compare0){
display_fnd();
}

signal(sig_overflow0){
portf ^= _bv(pf2);
}

signal(sig_interrupt4){
if(inumber 9999)
inumber += 1;
display_num(inumber);
}
signal(sig_interrupt5){
if(inumber 0)
inumber -= 1;
display_num(inumber);
}

signal(sig_interrupt6){
if(inumber 9990)
inumber += 10;
display_num(inumber);
}
signal(sig_interrupt7){
if(inumber 10)
inumber -= 10;
display_num(inumber);
}

void exint_init(void)
{
eimsk = 0xf0;
eicra = 0x00;
eicrb = 0xaa;
}

int main(void)
{
ddrf = 0xff;
portf = 0xfe;
ddrc = 0xff;
ddrd = 0xf0;
portc = 0x00;
portd = 0x00;
timer0_init();
timer0_set_mode(timer0_timer_mode);
timer0_set_prescaler(timer0_cs_128);
timer0_set_wave_mode(timer0_wgm_ctc);
timer0_set_comp_mode(timer0_com_port);
timer0_ovf_interrupt(enable);
timer0_comp_interrupt(enable);
timer0_set_ocr(62);
exint_init();
init_fnd();
sei();
while(1);
return 0;
}

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