64 lines
2.3 KiB
C++
64 lines
2.3 KiB
C++
/// @file HD107.ino
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/// @brief Example showing how to use the HD107 and HD which has built in gamma correction.
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/// This simply the HD107HD examles but with this chipsets.
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/// @see HD107HD.ino.
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#include <Arduino.h>
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#include <FastLED.h>
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#include <lib8tion.h>
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#define NUM_LEDS 20
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// uint8_t DATA_PIN, uint8_t CLOCK_PIN,
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#define STRIP_0_DATA_PIN 1
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#define STRIP_0_CLOCK_PIN 2
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#define STRIP_1_DATA_PIN 3
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#define STRIP_1_CLOCK_PIN 4
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CRGB leds_hd[NUM_LEDS] = {0}; // HD mode implies gamma.
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CRGB leds[NUM_LEDS] = {0}; // Software gamma mode.
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// This is the regular gamma correction function that we used to have
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// to do. It's used here to showcase the difference between HD107HD
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// mode which does the gamma correction for you.
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CRGB software_gamma(const CRGB& in) {
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CRGB out;
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// dim8_raw are the old gamma correction functions.
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out.r = dim8_raw(in.r);
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out.g = dim8_raw(in.g);
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out.b = dim8_raw(in.b);
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return out;
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}
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void setup() {
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delay(500); // power-up safety delay
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// Two strips of LEDs, one in HD mode, one in software gamma mode.
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FastLED.addLeds<HD107HD, STRIP_0_DATA_PIN, STRIP_0_CLOCK_PIN, RGB>(leds_hd, NUM_LEDS);
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FastLED.addLeds<HD107, STRIP_1_DATA_PIN, STRIP_1_CLOCK_PIN, RGB>(leds, NUM_LEDS);
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}
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uint8_t wrap_8bit(int i) {
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// Module % operator here wraps a large "i" so that it is
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// always in [0, 255] range when returned. For example, if
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// "i" is 256, then this will return 0. If "i" is 257
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// then this will return 1. No matter how big the "i" is, the
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// output range will always be [0, 255]
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return i % 256;
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}
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void loop() {
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// Draw a a linear ramp of brightnesses to showcase the difference between
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// the HD and non-HD mode.
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for (int i = 0; i < NUM_LEDS; i++) {
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uint8_t brightness = map(i, 0, NUM_LEDS - 1, 0, 255);
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CRGB c(brightness, brightness, brightness); // Just make a shade of white.
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leds_hd[i] = c; // The HD107HD leds do their own gamma correction.
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CRGB c_gamma_corrected = software_gamma(c);
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leds[i] = c_gamma_corrected; // Set the software gamma corrected
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// values to the other strip.
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}
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FastLED.show(); // All leds are now written out.
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delay(8); // Wait 8 milliseconds until the next frame.
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}
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