//-*-c++-*-
// LS259 demo code
// j. eric townsend, jet@flatline.net

const byte maxLed = 8; 
const byte statusLed = 13;
byte statusLedState = LOW;

const byte LS259_A = 7;
const byte LS259_B = 8;
const byte LS259_C = 9;
const byte LS259_D = 10;
const byte LS259_E = 11;

int ledStates[maxLed];

void setup() {

  pinMode(statusLed, OUTPUT);

  pinMode( LS259_A, OUTPUT);
  digitalWrite( LS259_A, LOW);
  pinMode( LS259_B, OUTPUT);
  digitalWrite( LS259_B, LOW);
  pinMode( LS259_C, OUTPUT);
  digitalWrite( LS259_C, LOW);
  pinMode( LS259_D, OUTPUT);
  digitalWrite( LS259_D, HIGH);
  pinMode( LS259_E, OUTPUT);
  digitalWrite( LS259_E, HIGH);

  for (int i = 0; i < maxLed; i++) {
      ledStates[i] = LOW;
  }

}

void loop () 
{
    for (int i = 0; i < maxLed; i++) {
	ledStates[i] = HIGH;
	SetLeds();
	delay(100);
	ledStates[i] = LOW;
	SetLeds();
	delay(100);
    }
}


void SetLeds()
{


    digitalWrite(LS259_E, HIGH);
    for (int i = 0; i < maxLed; i++) {
	switch(i) {
	    case 0:
		digitalWrite(LS259_A, LOW);
		digitalWrite(LS259_B, LOW);
		digitalWrite(LS259_C, LOW);
		digitalWrite(LS259_D, ledStates[0]);
		digitalWrite(LS259_E, LOW);
		digitalWrite(LS259_E, HIGH);
		break;
	    case 1:
		digitalWrite(LS259_A, HIGH);
		digitalWrite(LS259_B, LOW);
		digitalWrite(LS259_C, LOW);
		digitalWrite( LS259_D, ledStates[1]);
		digitalWrite( LS259_E, LOW);
		digitalWrite( LS259_E, HIGH);
		break;
	    case 2:
		digitalWrite(LS259_A, LOW);
		digitalWrite(LS259_B, HIGH);
		digitalWrite(LS259_C, LOW);
		digitalWrite( LS259_D, ledStates[2]);
		digitalWrite( LS259_E, LOW);
		digitalWrite( LS259_E, HIGH);
		break;
	    case 3:
		digitalWrite(LS259_A, HIGH);
		digitalWrite(LS259_B, HIGH);
		digitalWrite(LS259_C, LOW);
		digitalWrite( LS259_D, ledStates[3]);
		digitalWrite( LS259_E, LOW);
		digitalWrite( LS259_E, HIGH);
		break;
	    case 4:
		digitalWrite(LS259_A, LOW);
		digitalWrite(LS259_B, LOW);
		digitalWrite(LS259_C, HIGH);
		digitalWrite( LS259_D, ledStates[4]);
		digitalWrite( LS259_E, LOW);
		digitalWrite( LS259_E, HIGH);
		break;
	    case 5:
		digitalWrite(LS259_A, HIGH);
		digitalWrite(LS259_B, LOW);
		digitalWrite(LS259_C, HIGH);
		digitalWrite( LS259_D, ledStates[5]);
		digitalWrite( LS259_E, LOW);
		digitalWrite( LS259_E, HIGH);
		break;
	    case 6:
		digitalWrite(LS259_A, LOW);
		digitalWrite(LS259_B, HIGH);
		digitalWrite(LS259_C, HIGH);
		digitalWrite( LS259_D, ledStates[6]);
		digitalWrite( LS259_E, LOW);
		digitalWrite( LS259_E, HIGH);
		break;
	    case 7:
		digitalWrite(LS259_A, HIGH);
		digitalWrite(LS259_B, HIGH);
		digitalWrite(LS259_C, HIGH);
		digitalWrite( LS259_D, ledStates[7]);
		digitalWrite( LS259_E, LOW);
		digitalWrite( LS259_E, HIGH);
		break;
	    default:
		break;
	}
    } 
}

void AllOn()
{
    for (int i = 0; i < maxLed; i++) {
	ledStates[i] = HIGH;
    } 
}

void AllOff()
{
    for (int i = 0; i < maxLed; i++) {
	ledStates[i] = LOW;
    } 
}