/*
 * Digital I/O (dual 7-segment display board) lab sketch.
 *
 * This sketch demonstrates the use of a 7-segment display using a BCD-to-7segment
 * decoder to drive a digit's segments.
 *
 * The connections between the Arduino pins and ABCD header pins on the display
 * board are as follows:
 *   Analog Pin 0 (Digital Pin 14) -- display header pin A
 *   Analog Pin 1 (Digital Pin 15) -- display header pin B
 *   Analog Pin 2 (Digital Pin 16) -- display header pin C
 *   Analog Pin 3 (Digital Pin 17) -- display header pin D
 *
 * The function of this program is to be determined by the lab student.
 *
 * v1.00 Eric B. Wertz 2011/09/19 02:10 - Initial revision
 */

#define LDIGIT_DECODER_A 14
#define LDIGIT_DECODER_B 15
#define LDIGIT_DECODER_C 16
#define LDIGIT_DECODER_D 17

void setup()
{
  pinMode(LDIGIT_DECODER_A, OUTPUT);
  pinMode(LDIGIT_DECODER_B, OUTPUT);
  pinMode(LDIGIT_DECODER_C, OUTPUT);
  pinMode(LDIGIT_DECODER_D, OUTPUT);
}

void loop()
{
  digitalWrite(LDIGIT_DECODER_D, LOW);
  digitalWrite(LDIGIT_DECODER_C, LOW);
  digitalWrite(LDIGIT_DECODER_B, HIGH);
  digitalWrite(LDIGIT_DECODER_A, LOW);
}