84 lines
2.8 KiB
Arduino
84 lines
2.8 KiB
Arduino
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/* soundmems
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*
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* By: Andrew Tuline
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*
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* Date: October, 2014
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*
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* Basic code to read from the Sparkfun INMP401 microphone and display CHSV output.
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*
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*/
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#define qsubd(x, b) ((x>b)?b:0) // A digital unsigned subtraction macro. if result <0, then => 0. Otherwise, take on fixed value.
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#define qsuba(x, b) ((x>b)?x-b:0) // Analog Unsigned subtraction macro. if result <0, then => 0
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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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#define MIC_PIN 5 // Analog port for microphone
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#define DC_OFFSET 0 // Not used at this point. DC offset in mic signal - if unusure, leave 0
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// Initialize changeable global variables.
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uint8_t max_bright = 192; // 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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int wavebright = 20;
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void setup() {
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// This is only needed on 5V Arduinos (Uno, Leonardo, etc.). Connect 3.3V to mic AND TO AREF ON ARDUINO and enable this
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// line. Audio samples are 'cleaner' at 3.3V. COMMENT OUT THE FOLLOWING LINE FOR 3.3V ARDUINOS (FLORA, ETC.):
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analogReference(EXTERNAL);
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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 WS2812B
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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);
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} // setup()
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void loop() {
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EVERY_N_MILLISECONDS(20) {
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soundmems();
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}
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FastLED.show();
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} // loop()
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void soundmems() {
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int n;
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n = analogRead(MIC_PIN);
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n = qsuba(abs(n-512), 10);
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// Serial.println(n);
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nblend(leds[0], CHSV(n,255,n), 128);
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for (int i = NUM_LEDS-1; i>0; i--) {
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leds[i] = leds[i-1];
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}
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} // soundmems()
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