144 lines
6.4 KiB
C++
144 lines
6.4 KiB
C++
// A basic everyday NeoPixel strip test program.
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// NEOPIXEL BEST PRACTICES for most reliable operation:
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// - Add 1000 uF CAPACITOR between NeoPixel strip's + and - connections.
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// - MINIMIZE WIRING LENGTH between microcontroller board and first pixel.
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// - NeoPixel strip's DATA-IN should pass through a 300-500 OHM RESISTOR.
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// - AVOID connecting NeoPixels on a LIVE CIRCUIT. If you must, ALWAYS
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// connect GROUND (-) first, then +, then data.
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// - When using a 3.3V microcontroller with a 5V-powered NeoPixel strip,
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// a LOGIC-LEVEL CONVERTER on the data line is STRONGLY RECOMMENDED.
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// (Skipping these may work OK on your workbench but can fail in the field)
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#include <Adafruit_NeoPixel.h>
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#ifdef __AVR__
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#include <avr/power.h> // Required for 16 MHz Adafruit Trinket
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#endif
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// Which pin on the Arduino is connected to the NeoPixels?
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// On a Trinket or Gemma we suggest changing this to 1:
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#define LED_PIN 6
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// How many NeoPixels are attached to the Arduino?
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#define LED_COUNT 60
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// Declare our NeoPixel strip object:
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Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);
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// Argument 1 = Number of pixels in NeoPixel strip
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// Argument 2 = Arduino pin number (most are valid)
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// Argument 3 = Pixel type flags, add together as needed:
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// NEO_KHZ800 800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
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// NEO_KHZ400 400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
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// NEO_GRB Pixels are wired for GRB bitstream (most NeoPixel products)
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// NEO_RGB Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
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// NEO_RGBW Pixels are wired for RGBW bitstream (NeoPixel RGBW products)
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// setup() function -- runs once at startup --------------------------------
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void setup() {
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// These lines are specifically to support the Adafruit Trinket 5V 16 MHz.
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// Any other board, you can remove this part (but no harm leaving it):
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#if defined(__AVR_ATtiny85__) && (F_CPU == 16000000)
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clock_prescale_set(clock_div_1);
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#endif
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// END of Trinket-specific code.
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strip.begin(); // INITIALIZE NeoPixel strip object (REQUIRED)
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strip.show(); // Turn OFF all pixels ASAP
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strip.setBrightness(50); // Set BRIGHTNESS to about 1/5 (max = 255)
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}
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// loop() function -- runs repeatedly as long as board is on ---------------
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void loop() {
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// Fill along the length of the strip in various colors...
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colorWipe(strip.Color(255, 0, 0), 50); // Red
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colorWipe(strip.Color( 0, 255, 0), 50); // Green
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colorWipe(strip.Color( 0, 0, 255), 50); // Blue
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// Do a theater marquee effect in various colors...
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theaterChase(strip.Color(127, 127, 127), 50); // White, half brightness
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theaterChase(strip.Color(127, 0, 0), 50); // Red, half brightness
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theaterChase(strip.Color( 0, 0, 127), 50); // Blue, half brightness
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rainbow(10); // Flowing rainbow cycle along the whole strip
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theaterChaseRainbow(50); // Rainbow-enhanced theaterChase variant
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}
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// Some functions of our own for creating animated effects -----------------
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// Fill strip pixels one after another with a color. Strip is NOT cleared
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// first; anything there will be covered pixel by pixel. Pass in color
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// (as a single 'packed' 32-bit value, which you can get by calling
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// strip.Color(red, green, blue) as shown in the loop() function above),
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// and a delay time (in milliseconds) between pixels.
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void colorWipe(uint32_t color, int wait) {
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for(int i=0; i<strip.numPixels(); i++) { // For each pixel in strip...
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strip.setPixelColor(i, color); // Set pixel's color (in RAM)
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strip.show(); // Update strip to match
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delay(wait); // Pause for a moment
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}
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}
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// Theater-marquee-style chasing lights. Pass in a color (32-bit value,
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// a la strip.Color(r,g,b) as mentioned above), and a delay time (in ms)
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// between frames.
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void theaterChase(uint32_t color, int wait) {
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for(int a=0; a<10; a++) { // Repeat 10 times...
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for(int b=0; b<3; b++) { // 'b' counts from 0 to 2...
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strip.clear(); // Set all pixels in RAM to 0 (off)
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// 'c' counts up from 'b' to end of strip in steps of 3...
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for(int c=b; c<strip.numPixels(); c += 3) {
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strip.setPixelColor(c, color); // Set pixel 'c' to value 'color'
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}
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strip.show(); // Update strip with new contents
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delay(wait); // Pause for a moment
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}
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}
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}
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// Rainbow cycle along whole strip. Pass delay time (in ms) between frames.
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void rainbow(int wait) {
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// Hue of first pixel runs 5 complete loops through the color wheel.
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// Color wheel has a range of 65536 but it's OK if we roll over, so
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// just count from 0 to 5*65536. Adding 256 to firstPixelHue each time
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// means we'll make 5*65536/256 = 1280 passes through this loop:
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for(long firstPixelHue = 0; firstPixelHue < 5*65536; firstPixelHue += 256) {
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// strip.rainbow() can take a single argument (first pixel hue) or
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// optionally a few extras: number of rainbow repetitions (default 1),
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// saturation and value (brightness) (both 0-255, similar to the
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// ColorHSV() function, default 255), and a true/false flag for whether
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// to apply gamma correction to provide 'truer' colors (default true).
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strip.rainbow(firstPixelHue);
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// Above line is equivalent to:
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// strip.rainbow(firstPixelHue, 1, 255, 255, true);
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strip.show(); // Update strip with new contents
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delay(wait); // Pause for a moment
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}
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}
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// Rainbow-enhanced theater marquee. Pass delay time (in ms) between frames.
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void theaterChaseRainbow(int wait) {
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int firstPixelHue = 0; // First pixel starts at red (hue 0)
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for(int a=0; a<30; a++) { // Repeat 30 times...
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for(int b=0; b<3; b++) { // 'b' counts from 0 to 2...
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strip.clear(); // Set all pixels in RAM to 0 (off)
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// 'c' counts up from 'b' to end of strip in increments of 3...
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for(int c=b; c<strip.numPixels(); c += 3) {
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// hue of pixel 'c' is offset by an amount to make one full
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// revolution of the color wheel (range 65536) along the length
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// of the strip (strip.numPixels() steps):
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int hue = firstPixelHue + c * 65536L / strip.numPixels();
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uint32_t color = strip.gamma32(strip.ColorHSV(hue)); // hue -> RGB
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strip.setPixelColor(c, color); // Set pixel 'c' to value 'color'
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}
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strip.show(); // Update strip with new contents
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delay(wait); // Pause for a moment
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firstPixelHue += 65536 / 90; // One cycle of color wheel over 90 frames
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}
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}
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}
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