pidor

#include <hidef.h>      /* common defines and macros */
#include "derivative.h"      /* derivative-specific definitions */



unsigned int CHECK = 0;
unsigned int DIRECT = 0;
unsigned int b = 0;
unsigned int DIR = 0;
unsigned int bit_0 = 0;
unsigned int bit_1 = 0;
unsigned int bit_2 = 0;
unsigned int bit_3 = 0;

unsigned int bits4 = 0;

void main()
{
  DDRP = 0xF0;
  DDRB = 0xF0;

  PUCR |= 0x02;

  TSCR2 = 0x83;
  DIRECT=12536;
  TSCR1 = 0x80;
  PORTB = 0xFF;

  EnableInterrupts;
  for (;;)
  {}
}

interrupt 16 void TOF()
{
  TFLG2 = 0x80;
  CHECK=PORTAB;
  bit_0 = (PORTAB & 1) << 3;
  bit_1 = (PORTAB & 2) << 1;
  bit_2 = (PORTAB & 4) >> 1;
  bit_3 = (PORTAB & 8) >> 3;

  bits4 = bit_3 + bit_2 + bit_1 + bit_0;
  PORTB = bits4 << 4;


}