77 lines
2.6 KiB
Arduino
77 lines
2.6 KiB
Arduino
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/* Sawtooth
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*
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* By: Andrew Tuline
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*
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* Date: February, 2018
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*
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* Creating a sawtooth pattern using millis and bpm. It runs at about 440 fps with the configuration below on an Arduino Nano.
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*
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*/
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#include "FastLED.h" // FastLED library.
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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 modify LEDS.addLeds to suit.
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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 = 128; // Overall brightness.
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struct CRGB leds[NUM_LEDS]; // Initialize our LED array.
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// Palette definitions
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CRGBPalette16 currentPalette = PartyColors_p;
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CRGBPalette16 targetPalette = PartyColors_p;
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TBlendType currentBlending = LINEARBLEND; // NOBLEND or LINEARBLEND
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void setup() {
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Serial.begin(57600); // Initialize serial port for debugging.
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delay(1000); // Delayed startup in case there's an issue on some platforms.
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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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// LEDS.addLeds<LED_TYPE, LED_DT, COLOR_ORDER>(leds, NUM_LEDS); // Use this for WS2812
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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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Serial.println(LEDS.getFPS());
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sawtooth();
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FastLED.show();
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} // loop()
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void sawtooth() {
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int bpm = 60;
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int ms_per_beat = 60000/bpm; // 500ms per beat, where 60,000 = 60 seconds * 1000 ms
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int ms_per_led = 60000/bpm/NUM_LEDS;
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int cur_led = ((millis() % ms_per_beat) / ms_per_led)%(NUM_LEDS); // Using millis to count up the strand, with %NUM_LEDS at the end as a safety factor.
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if (cur_led == 0)
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fill_solid(leds, NUM_LEDS, CRGB::Black);
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else
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leds[cur_led] = ColorFromPalette(currentPalette, 0, 255, currentBlending); // I prefer to use palettes instead of CHSV or CRGB assignments.
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} // sawtooth()
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