31 lines
694 B
C++
31 lines
694 B
C++
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#include "zauberstab.h"
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CRGB leds[NUM_LEDS];
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static int16_t mic_offset = 0;
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static uint16_t read_mic() {
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return analogRead(MIC_PIN);
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}
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static uint16_t get_mic_offset() {
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float average = 0.f;
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uint32_t num_samples = 0;
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for(num_samples = 0; num_samples < 10000; num_samples++) {
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uint16_t sample = read_mic();
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average += ((float) sample - average) / (num_samples + 1);
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}
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return (uint16_t)average;
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}
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int zauberstab_init() {
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FastLED.addLeds<WS2812, LED_PIN, RGB>(leds, NUM_LEDS);
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//FastLED.setMaxPowerInVoltsAndMilliamps(5, 300);
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mic_offset = get_mic_offset();
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return 0;
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}
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int32_t get_sample() {
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return read_mic() - mic_offset;
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}
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