Atemga 세그먼트 출력

#include <mega128.h>

#include <io.h>

#include <interrupt.h>

#include <stdio.h>

int  D_time=1;

int  SS_data[10]={0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f};

int  SS_PORTC[5]={0, 0x01, 0x02, 0x04, 0x08};

int  what=3232;

int where[4]={0,0,0,0};

void init_port(void)

{

 PORTA = 0x00;

 DDRA  = 0xff;

 PORTB = 0x00;

 DDRB  = 0xff;

 PORTC = 0x00;

 DDRC  = 0xff;

 PORTD = 0x00;

 DDRD  = 0xff;

 PORTE = 0x00;

 DDRE  = 0xff;

 PORTF = 0x00;

 DDRF  = 0xff;

 PORTG = 0x00;

 DDRG  = 0xff;

}

 

void init_devices(void)

{ 

 TIMSK = 0x41; //타이머0,2 오버플로우 사용 

 sei(); //re-enable interrupts

}

void delay(int times)

{

int  i,j;

  for (i=0; i<times; i++) {

    for (j=0;j<i;j++);

  }

}

void SS_val(int PC, int PA, int D_time)

{

    PORTC = ~PC;

    PORTA = PA;

    delay(D_time);

}

//

void main(void)

{

  

  where[3] = what/1000;

  where[2] = (what - where[3]*1000)/100;

  where[1] = (what - where[3]*1000 - where[2]*100)/10;

  where[0] = (what - where[3]*1000 - where[2]*100 - where[1]*10);

/*------------------------------------------------------------------*/

 

 init_devices();

 init_port();

 //insert your functional code here...

 while(1) {

        SS_val(SS_PORTC[1], SS_data[where[3]], D_time);

        SS_val(SS_PORTC[2], SS_data[where[2]], D_time);

        SS_val(SS_PORTC[3], SS_data[where[1]], D_time);

        SS_val(SS_PORTC[4], SS_data[where[0]], D_time);                  

    }

}