iowa-timer/showShape.ino

void showShape(int shape)
{
  //    -  A
  //   / / F/B
  //    -  G
  //   / / E/C
  //    -. D/DP

#define a  1<<0
#define b  1<<6
#define c  1<<5
#define d  1<<4
#define e  1<<3
#define f  1<<1
#define g  1<<2
#define dp 1<<7

  byte segments1;
  byte segments2;
  byte segments3;
  byte segments4;
  byte segments5;
  byte segments6;

  switch (shape)
  {
    // 
    case 0:
      segments1 = a | f | b | e | c | d;
      segments2 = a | f | b | e | c | d;
      segments3 = a | f | b | e | c | d;
      segments4 = a | f | b | e | c | d;
      segments5 = a | f | b | e | c | d;
      segments6 = a | f | b | e | c | d;
     
      break;
    // . .
    case 1:
      segments1 = dp;
      segments2 = dp;
      segments3 = dp;
      segments4 = dp;
      segments5 = dp;
      segments6 = dp;
      break;
    // _ _
    case 2:
      segments1 = d;
      segments2 = d;
      segments3 = d;
      segments4 = d;
      segments5 = d;
      segments6 = d;
      
      break;
    // Double 88
    case 3:
      segments1 = a | f | b | e | c | d | g;
      segments2 = a | f | b | e | c | d | g;  
      break;
    // - -
    case 4:
      segments1 = g;
      segments2 = g;
      segments3 = g;
      segments4 = g;
      segments5 = g;
      segments6 = g;
      break;
    // NOTHING
    case 5:
      segments1 = 0;
      segments2 = 0;
      break;  
  }
  //Clock these bits out to the drivers
  // Segment1
  for (byte x = 0 ; x < 8 ; x++)
  {
    digitalWrite(segmentClock, LOW);
    digitalWrite(segmentData, segments1 & 1 << (7 - x));
    digitalWrite(segmentClock, HIGH); //Data transfers to the register on the rising edge of SRCK
  }

  digitalWrite(segmentLatch, LOW);
  digitalWrite(segmentLatch, HIGH); //Register moves storage register on the rising edge of RCK

  // Segment2
  for (byte x = 0 ; x < 8 ; x++)
  {
    digitalWrite(segmentClock, LOW);
    digitalWrite(segmentData, segments2 & 1 << (7 - x));

    digitalWrite(segmentClock, HIGH); //Data transfers to the register on the rising edge of SRCK
  }

  digitalWrite(segmentLatch, LOW);
  digitalWrite(segmentLatch, HIGH); //Register moves storage register on the rising edge of RCK

// Segment3
  for (byte x = 0 ; x < 8 ; x++)
  {
    digitalWrite(segmentClock, LOW);
    digitalWrite(segmentData, segments3 & 1 << (7 - x));

    digitalWrite(segmentClock, HIGH); //Data transfers to the register on the rising edge of SRCK
  }

  digitalWrite(segmentLatch, LOW);
  digitalWrite(segmentLatch, HIGH); //Register moves storage register on the rising edge of RCK

// Segment4
  for (byte x = 0 ; x < 8 ; x++)
  {
    digitalWrite(segmentClock, LOW);
    digitalWrite(segmentData, segments4 & 1 << (7 - x));
    digitalWrite(segmentClock, HIGH); //Data transfers to the register on the rising edge of SRCK
  }

  digitalWrite(segmentLatch, LOW);
  digitalWrite(segmentLatch, HIGH); //Register moves storage register on the rising edge of RCK

  // Segment5
  for (byte x = 0 ; x < 8 ; x++)
  {
    digitalWrite(segmentClock, LOW);
    digitalWrite(segmentData, segments5 & 1 << (7 - x));

    digitalWrite(segmentClock, HIGH); //Data transfers to the register on the rising edge of SRCK
  }

  digitalWrite(segmentLatch, LOW);
  digitalWrite(segmentLatch, HIGH); //Register moves storage register on the rising edge of RCK

// Segment6
  for (byte x = 0 ; x < 8 ; x++)
  {
    digitalWrite(segmentClock, LOW);
    digitalWrite(segmentData, segments6 & 1 << (7 - x));

    digitalWrite(segmentClock, HIGH); //Data transfers to the register on the rising edge of SRCK
  }

  digitalWrite(segmentLatch, LOW);
  digitalWrite(segmentLatch, HIGH); //Register moves storage register on the rising edge of RCK


}