80 lines
3.5 KiB
C++
80 lines
3.5 KiB
C++
/* lightnings
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*
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* By: Daniel Wilson
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*
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* Modified by: Andrew Tuline
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*
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* Date: January, 2017
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*
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* Lightnings is a program that lets you make an LED strip look like a 1D cloud of lightning.
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* I wouldn't use this code in conjunction with any controls because it uses those nasty blocking delays which I haven't bothered to remove.
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*
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*/
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#include "FastLED.h"
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#if FASTLED_VERSION < 3001000
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#error "Requires FastLED 3.1 or later; check github for latest code."
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#endif
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// Fixed definitions cannot change on the fly.
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#define LED_DT 12 // Data pin to connect to the strip.
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#define LED_CK 11 // Clock pin for WS2801 or APA102.
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#define COLOR_ORDER BGR // It's GRB for WS2812 and BGR for APA102.
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#define LED_TYPE APA102 // Using APA102, WS2812, WS2801. Don't forget to change LEDS.addLeds.
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#define NUM_LEDS 60 // Number of LED's.
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// Global variables can be changed on the fly.
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uint8_t max_bright = 255; // Overall brightness definition. It can be changed on the fly.
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struct CRGB leds[NUM_LEDS]; // Initialize our LED array.
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uint8_t frequency = 50; // controls the interval between strikes
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uint8_t flashes = 8; //the upper limit of flashes per strike
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unsigned int dimmer = 1;
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uint8_t ledstart; // Starting location of a flash
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uint8_t ledlen; // Length of a flash
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void setup() {
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Serial.begin(57600); // Initialize serial port for debugging.
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delay(1000); // Soft startup to ease the flow of electrons.
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// LEDS.addLeds<LED_TYPE, LED_DT, COLOR_ORDER>(leds, NUM_LEDS); // Use this for WS2812
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LEDS.addLeds<LED_TYPE, LED_DT, LED_CK, COLOR_ORDER>(leds, NUM_LEDS); // Use this for WS2801 or APA102
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FastLED.setBrightness(max_bright);
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set_max_power_in_volts_and_milliamps(5, 500); // FastLED Power management set at 5V, 500mA.
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} // setup()
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void loop() {
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ledstart = random8(NUM_LEDS); // Determine starting location of flash
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ledlen = random8(NUM_LEDS-ledstart); // Determine length of flash (not to go beyond NUM_LEDS-1)
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for (int flashCounter = 0; flashCounter < random8(3,flashes); flashCounter++) {
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if(flashCounter == 0) dimmer = 5; // the brightness of the leader is scaled down by a factor of 5
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else dimmer = random8(1,3); // return strokes are brighter than the leader
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fill_solid(leds+ledstart,ledlen,CHSV(255, 0, 255/dimmer));
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FastLED.show(); // Show a section of LED's
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delay(random8(4,10)); // each flash only lasts 4-10 milliseconds
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fill_solid(leds+ledstart,ledlen,CHSV(255,0,0)); // Clear the section of LED's
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FastLED.show();
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if (flashCounter == 0) delay (150); // longer delay until next flash after the leader
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delay(50+random8(100)); // shorter delay between strokes
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} // for()
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delay(random8(frequency)*100); // delay between strikes
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} // loop()
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