Over the past few weeks I’ve been working on a project that utilizes an msp430 micro-controller and a MegaBrite LED. The LED has a 32-bit shift register and supports 1024 color intensities of red, green and blue. Unfortunately I shorted the LED chip and burned out the logic device so I cannot provide a video of it working, but this is the Energia logic I’ve written to control it. This code should work for an Arduino as well.

void rgbConversion(int red, int green, int blue, int clockPin, int latchPin, int dataPin)
{
	//Set control values
	digitalWrite(dataPin, LOW);
	digitalWrite(clockPin, HIGH);
	digitalWrite(clockPin, LOW);

	int j = 0;
	int i = 9;
	float color = blue*1023.0/255.0;
	int colorInt = color;
	int temp[] = {0,0,0,0,0,0,0,0,0,0};
	for (j = 0; j < 16; j ++)
	{
		temp[i] = !!(colorInt & (1 << j));
		if (j < 10)
		{
			i = i - 1;
		}
	}
	for (i = 0; i < 10; i++)
	{
		digitalWrite(dataPin, temp[i]);
		digitalWrite(clockPin, HIGH);
		digitalWrite(clockPin, LOW);
	}
	i = 9;
	color = red*1023.0/255.0;
	colorInt = color;
	for (j = 0; j < 16; j ++)
	{
		temp[i] = !!(colorInt & (1 << j));
		if (j < 10)
		{
			i = i - 1;
		}
	}
	for (i = 0; i < 10; i++)
	{
		digitalWrite(dataPin, temp[i]);
		digitalWrite(clockPin, HIGH);
		digitalWrite(clockPin, LOW);
	}
	i = 9;
	color = green*1023.0/255.0;
	colorInt = color;
	for (j = 0; j < 16; j ++)
	{
		temp[i] = !!(colorInt & (1 << j));
		if (j < 10)
		{
			i = i - 1;
		}
	}
	for (i = 0; i < 10; i++)
	{
		digitalWrite(dataPin, temp[i]);
		digitalWrite(clockPin, HIGH);
		digitalWrite(clockPin, LOW);
	}
	digitalWrite(latchPin, HIGH);
	digitalWrite(latchPin, LOW);
}