void action() { 
volatile byte v;
volatile int w;
volatile int i;

// **************************************************
// Display the address of the first displayed channel
// **************************************************
w = dmxaddress - 3;  // Adjust back to the true address
lcd.setCursor(0,0);
if (w < 10) {
  lcd.print("  ");
}
else if (w < 100) {
  lcd.print(" ");
}
lcd.print(w);
lcd.print(":");


// **************************************************
// Compute the frames/sec
// **************************************************
lcd.setCursor(0,1);
if (deltaT > 1000) {
  // Less than one frame per second -> we assume no incoming data
  lcd.print("---  ");
  for (i=0; i<7; i++) {
    fpsArray[i] = 0;
  }
} else {
  v = 1000 / deltaT;  // current frames/sec -> 1 second / deltaT
  w = 0;
  for (i=7; i>0; i--) {
    fpsArray[i] = fpsArray[i-1];  // shift averaging array
    w += fpsArray[i];  // sum components for average
  }
  fpsArray[0] = v;
  w += v;
  v = w >> 3;  // average = sum / 8 (probably ought to round this)
  if (v < 10) {
    lcd.print(" ");
  }
  lcd.print(v, DEC);
  lcd.print("/s ");
}

// **************************************************
// Display the 8 channels, 4 per line
// **************************************************
for (i=0; i<8; i++) {
  lcd.setCursor(lcdCol[i],lcdRow[i]);
  v = dmxvalue[i];
  if (v < 16) {
    lcd.print(" ");
  }
  lcd.print(v, HEX);
}

  return;  //go back to loop()
} //end action() loop