iowa-timer/postNumberLap.ino

//Given a number, or '-', shifts it out to the display
void postNumberLAP(int number, boolean decimal)
{
  //    -  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 segmentsLAP;

  switch (number)
  {
    case 1: segmentsLAP = b | c; break;
    case 2: segmentsLAP = a | b | d | e | g; break;
    case 3: segmentsLAP = a | b | c | d | g; break;
    case 4: segmentsLAP = f | g | b | c; break;
    case 5: segmentsLAP = a | f | g | c | d; break;
    case 6: segmentsLAP = a | f | g | e | c | d; break;
    case 7: segmentsLAP = a | b | c; break;
    case 8: segmentsLAP = a | b | c | d | e | f | g; break;
    case 9: segmentsLAP = a | b | c | d | f | g; break;
 //   case 0: 
  //    if (number > 9) {
  //      segments = a | b | c | d | e | f; break;
  //    } else segments = 0; break;
      
   case 0: segmentsLAP = a | b | c | d | e | f; break;
    case ' ': segmentsLAP = 0; break;
    case 'c': segmentsLAP = g | e | d; break;
    case '-': segmentsLAP = g; break;
  }

  if (decimal) segmentsLAP |= dp;

  //Clock these bits out to the drivers
  for (byte x = 0 ; x < 8 ; x++)
  {
    digitalWrite(segmentClockLAP, LOW);
    digitalWrite(segmentDataLAP, segmentsLAP & 1 << (7 - x));
    digitalWrite(segmentClockLAP, HIGH); //Data transfers to the register on the rising edge of SRCK
  }
}