Pinball Display Driver

gistfile1.ino

/*
 * Pinball Display Driver
 * Arudino version by Leandro Pereira
 *
 * Based on code by Daniel Quadros, available at
 * http://dqsoft.blogspot.com.br/2011/06/projeto-epoch-parte4-software-cont.html
 */

#define DISP_S0 8
#define DISP_S1 9
#define DISP_S2 10

char valor[16];

void setup()
{
  for (char i = 0; i <= 10; i++) {
    pinMode(i, OUTPUT);
  }
  
  for (char i = 0; i < 16; i++) {
    valor[15 - i] = i & 7;
  }
}

void loop()
{
  static unsigned char disp = 0;

  digitalWrite(DISP_S0, disp & 1);
  digitalWrite(DISP_S1, disp & 2);
  digitalWrite(DISP_S2, disp & 4);

  char digito = valor[15 - disp] << 4 | valor[disp];

  /* Display esquerdo */
  digitalWrite(0, digito & (1<<0));
  digitalWrite(1, digito & (1<<1));
  digitalWrite(2, digito & (1<<2));
  digitalWrite(3, digito & (1<<3));

  /* Display direito */
  digitalWrite(4, digito & (1<<4));
  digitalWrite(5, digito & (1<<5));
  digitalWrite(6, digito & (1<<6));
  digitalWrite(7, digito & (1<<7));

  disp = (disp + 1) & 7;
  delay(1);
}