Initial import of support files for all Digistump boards - Digispark, Pro, DigiX - including libraries, examples, tools, and other support files for the Arduino IDE

hardware/digistump/avr/libraries/LPD8806/examples/longstrandtest/longstrandtest.pde

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+#include "LPD8806.h"
+#include "SPI.h"
+
+// Simple test for 160 (5 meters) of LPD8806-based RGB LED strip
+
+/*****************************************************************************/
+
+// Number of RGB LEDs in strand:
+int nLEDs = 160;
+
+// Chose 2 pins for output; can be any valid output pins:
+int dataPin  = 2;
+int clockPin = 3;
+
+// First parameter is the number of LEDs in the strand.  The LED strips
+// are 32 LEDs per meter but you can extend or cut the strip.  Next two
+// parameters are SPI data and clock pins:
+LPD8806 strip = LPD8806(nLEDs, dataPin, clockPin);
+
+// You can optionally use hardware SPI for faster writes, just leave out
+// the data and clock pin parameters.  But this does limit use to very
+// specific pins on the Arduino.  For "classic" Arduinos (Uno, Duemilanove,
+// etc.), data = pin 11, clock = pin 13.  For Arduino Mega, data = pin 51,
+// clock = pin 52.  For 32u4 Breakout Board+ and Teensy, data = pin B2,
+// clock = pin B1.  For Leonardo, this can ONLY be done on the ICSP pins.
+//LPD8806 strip = LPD8806(nLEDs);
+
+void setup() {
+  // Start up the LED strip
+  strip.begin();
+
+  // Update the strip, to start they are all 'off'
+  strip.show();
+}
+
+void loop() {
+  colorChase(strip.Color(127,  0,  0), 100); // Red
+  colorChase(strip.Color(  0,127,  0), 100); // Green
+  colorChase(strip.Color(  0,  0,127), 100); // Blue
+  colorChase(strip.Color(127,127,127), 100); // White
+}
+
+// Chase one dot down the full strip.  Good for testing purposes.
+void colorChase(uint32_t c, uint8_t wait) {
+  int i;
+  
+  // Start by turning all pixels off:
+  for(i=0; i<strip.numPixels(); i++) strip.setPixelColor(i, 0);
+
+  // Then display one pixel at a time:
+  for(i=0; i<strip.numPixels(); i++) {
+    strip.setPixelColor(i, c); // Set new pixel 'on'
+    strip.show();              // Refresh LED states
+    strip.setPixelColor(i, 0); // Erase pixel, but don't refresh!
+    delay(wait);
+  }
+
+  strip.show(); // Refresh to turn off last pixel
+}
+