Arduino communicate with Vixen Lighting Control Software

vixen_lights_6_channels_pwm.ino

/*
    Basic Pin setup:
    ------------                                  ---u----
    ARDUINO   13|-> SCLK (pin 25)           OUT1 |1     28| OUT channel 0
              12|                           OUT2 |2     27|-> GND (VPRG)
              11|-> SIN (pin 26)            OUT3 |3     26|-> SIN (pin 11)
              10|-> BLANK (pin 23)          OUT4 |4     25|-> SCLK (pin 13)
               9|-> XLAT (pin 24)             .  |5     24|-> XLAT (pin 9)
               8|                             .  |6     23|-> BLANK (pin 10)
               7|                             .  |7     22|-> GND
               6|                             .  |8     21|-> VCC (+5V)
               5|                             .  |9     20|-> 2K Resistor -> GND
               4|                             .  |10    19|-> +5V (DCPRG)
               3|-> GSCLK (pin 18)            .  |11    18|-> GSCLK (pin 3)
               2|                             .  |12    17|-> SOUT
               1|                             .  |13    16|-> XERR
               0|                           OUT14|14    15| OUT channel 15
    ------------                                  --------
    -  +5V from Arduino -> TLC pin 21 and 19     (VCC and DCPRG)
    -  GND from Arduino -> TLC pin 22 and 27     (GND and VPRG)
    -  digital 3        -> TLC pin 18            (GSCLK)
    -  digital 9        -> TLC pin 24            (XLAT)
    -  digital 10       -> TLC pin 23            (BLANK)
    -  digital 11       -> TLC pin 26            (SIN)
    -  digital 13       -> TLC pin 25            (SCLK)
    -  The 2K resistor between TLC pin 20 and GND will let ~20mA through each
       LED.  To be precise, it's I = 39.06 / R (in ohms).  
*/
#include "Tlc5940.h"
#define CHANNELS_COUNT 16
int incomingData;
void setup()
{
  Serial.begin(9600);        // set up Serial at 9600 bps
  Serial.println("Vixen + TLC5940 demo");
  Tlc.init(0);  // Call Tlc.init() to setup the tlc.
}
void loop()
{
  if (Serial.available() >= CHANNELS_COUNT) {
    for (int i = 0; i < CHANNELS_COUNT; i++) {
      incomingData = Serial.read(); //read each byte
      incomingData = map(incomingData, 0, 255, 0, 4095); //scale to TLC range.
      Tlc.set(i, incomingData);
    }
    Tlc.update(); //sends the data to the TLCs.  This is when the LEDs will actually change
  }
}