RGBPixel.md

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Adafruit RGB Pixel Strip

Learn how to use a RGB Pixel Strip.

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Required Components

• RGB Pixel Strip{:target="_blank"}
• 5V Power Supply (WARNING: do not exceed 6V DC){:target="_blank"}
  • Note: The strip draws 120mA per 2.5" strip segment, so choose your power supply accordingly.
• Female DC Power adapter{:target="_blank"}

Hooking up Components

• Info on how to power the strip with the DC Power Supply and Female DC Power Adapter{:target="_blank"}
• Info on how to wire the RGB Pixel Strip for use.{:target="_blank"}

Create a new project

1. Create a new project from the template.
2. Replace the existing code in main.cpp with the following code:

Code

Main.cpp

{% highlight C++ %} // Main.cpp : Defines the entry point for the console application. //

#include "stdafx.h" #include "arduino.h"

const int stripClock = 2; const int stripData = 3; const int stripLen = 48;

typedef struct _PIXEL_VALUES { BYTE Green; BYTE Red; BYTE Blue; } PIXEL_VALUES, *PPIXEL_VALUES;

// Array of stored Pixel values PIXEL_VALUES Pixels[stripLen];

// Custom Functions for working with the RGB Pixel Strip void SetPixel(int pixel, BYTE Red, BYTE Green, BYTE Blue); void ShiftPixel(int pixel); void ShiftAllPixels();

int _tmain(int argc, _TCHAR* argv []) { return RunArduinoSketch(); }

void setup() { // Set pins to outputs pinMode(stripClock, OUTPUT); pinMode(stripData, OUTPUT); digitalWrite(stripClock, LOW); digitalWrite(stripData, LOW); _PinFunction(stripData, DEFAULT_MUX); // Sets the data pin to Digital Functionality

// Reset all the pixels
for (int i = 0; i < stripLen; i++)
{
    SetPixel(i, 0, 0, 0);
}
ShiftAllPixels();

}

void loop() { int i;

// Set the pixels to Red
for (i = 0; i < stripLen; i++)
{
    SetPixel(i, (i & 0x7F), 0, 0);
}
ShiftAllPixels();

// Set the pixels to Green
for (i = 0; i < stripLen; i++)
{
    SetPixel(i, 0, (i & 0x7F), 0);
}
ShiftAllPixels();

// Set the pixels to Blue
for (i = 0; i < stripLen; i++)
{
    SetPixel(i, 0, 0, (i & 0x7F));
}
ShiftAllPixels();

// Set the pixels to White
for (i = 0; i < stripLen; i++)
{
    SetPixel(i, (i & 0x7F), (i & 0x7F), (i & 0x7F));
}
ShiftAllPixels();

// Set the pixels to gradient from Yellow to Cyan
for (i = 0; i < stripLen; i++)
{
    SetPixel(i, ((stripLen - i) & 0x7F), ((128 + (stripLen / 2) + i) & 0x7F), (i & 0x7F));
}
ShiftAllPixels();

// Set the pixels to random colors
for (i = 0; i < stripLen; i++)
{
    SetPixel(i, (BYTE) random(0, 40), (BYTE) random(0, 40), (BYTE) random(0, 40));
}
ShiftAllPixels();

// Turn the pixels off
for (i = 0; i < stripLen; i++)
{
    SetPixel(i, 0, 0, 0);
}
ShiftAllPixels();

}

// Sets the pixel color in our array void SetPixel(int pixel, BYTE Red, BYTE Green, BYTE Blue) { if (pixel < stripLen) { Pixels[pixel].Red = Red | 0x80; Pixels[pixel].Green = Green | 0x80; Pixels[pixel].Blue = Blue | 0x80; } }

// Sends the color of a pixel to the strip void ShiftPixel(int pixel) { PPIXEL_VALUES PixelValues = &Pixels[pixel]; BYTE bit; int i;

for (i = 7; i >= 0; i--)
{
    bit = (PixelValues->Green >> i) & 0x01;
    digitalWrite(stripData, bit);
    digitalWrite(stripClock, HIGH);
    digitalWrite(stripClock, LOW);
}
for (i = 7; i >= 0; i--)
{
    bit = (PixelValues->Red >> i) & 0x01;
    digitalWrite(stripData, bit);
    digitalWrite(stripClock, HIGH);
    digitalWrite(stripClock, LOW);
}
for (i = 7; i >= 0; i--)
{
    bit = (PixelValues->Blue >> i) & 0x01;
    digitalWrite(stripData, bit);
    digitalWrite(stripClock, HIGH);
    digitalWrite(stripClock, LOW);
}

}

// Sends all the pixel colors to the strip void ShiftAllPixels() { int i;

digitalWrite(stripData, 0);
for (i = 0; i < 8; i++)
{
    digitalWrite(stripClock, HIGH);
    digitalWrite(stripClock, LOW);
}
for (i = 0; i < 8; i++)
{
    digitalWrite(stripClock, HIGH);
    digitalWrite(stripClock, LOW);
}
for (i = 0; i < 8; i++)
{
    digitalWrite(stripClock, HIGH);
    digitalWrite(stripClock, LOW);
}

for (i = 0; i < stripLen; i++)
{
    ShiftPixel(i);
}

digitalWrite(stripData, 0);
for (i = 0; i < 8; i++)
{
    digitalWrite(stripClock, HIGH);
    digitalWrite(stripClock, LOW);
}
for (i = 0; i < 8; i++)
{
    digitalWrite(stripClock, HIGH);
    digitalWrite(stripClock, LOW);
}

} {% endhighlight %}

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