LEDの制御に時間の概念を取り入れる：S08ではじめるマイコン制御プログラミング（4）（3/3 ページ）

#include <hidef.h> /* for EnableInterrupts macro */
#include "derivative.h" /* include peripheral declarations */
void mcu_init(void);
void putbyte_led(unsigned char);
 
char step;
unsigned char c;
 
void main(void) {
 
  EnableInterrupts; /* enable interrupts */
  /* include your code here */
  mcu_init();
 
  c = 0;
  step = 0;
  for(;;) ; /* loop forever */
  /* please make sure that you never leave main */
}
 
void mcu_init(void){
  SOPT1_COPE = 0;
  PTCDD_PTCDD0 = 1;
  PTCDD_PTCDD1 = 1;
  PTCDD_PTCDD2 = 1;
  PTCDD_PTCDD3 = 1;
  PTCDD_PTCDD4 = 1;
  PTCDD_PTCDD5 = 1;
  PTEDD_PTEDD6 = 1;
  PTEDD_PTEDD7 = 1;
  KBI1PE_KBIPE2 = 1;
  PTAPE_PTAPE2 = 1;
  KBI1PE_KBIPE3 = 1;
  PTAPE_PTAPE3 = 1;
  KBI2PE_KBIPE2= 1;
  PTDPE_PTDPE2 = 1;
  KBI1SC_KBIE = 1;
  KBI2SC_KBIE = 1;
  RTCSC_RTCLKS = 0;
  RTCSC_RTCPS = 0xe;
  RTCSC_RTIE = 1;
  return ;
}
 
void putbyte_led(unsigned char c){
  c = ~c;
  PTED_PTED7 = c & 0x01;
  PTED_PTED6 = (c >> 1) & 0x01; 
  PTCD_PTCD5 = (c >> 2) & 0x01;
  PTCD_PTCD4 = (c >> 3) & 0x01;
  PTCD_PTCD3 = (c >> 4) & 0x01;
  PTCD_PTCD2 = (c >> 5) & 0x01;
  PTCD_PTCD1 = (c >> 6) & 0x01;
  PTCD_PTCD0 = (c >> 7) & 0x01;
  return ;
}
 
interrupt VectorNumber_Vkeyboard void chk_key_stat(void){
  if (KBI1SC_KBF) {
    KBI1SC_KBACK = 1;
    if (!PTAD_PTAD2) {
      step = 1;
    } else if (!PTAD_PTAD3) {
      step = -1;
    }
  }
  if (KBI2SC_KBF) {
    KBI2SC_KBACK = 1;
    if (!PTDD_PTDD2) {
      step = 0;
    }
  }
  return ; 
}
 
interrupt VectorNumber_Vrtc void int_timer(void){
  RTCSC_RTIF = 1;
  putbyte_led(c);
  c += step;
  return ; 
}