67 lines
1.4 KiB
C++
67 lines
1.4 KiB
C++
#include "app.h"
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#include "pt1.h"
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#include "zauberstab.h"
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unsigned long last_sample_time;
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static int sample_counter = 0;
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unsigned int top_led_pos = 0;
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float rms_avg = 0;
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float vu_filt = 0.0f;
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float vu_filt_slow = 0.0f;
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float dt;
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Pt1<float> vu_pt1_fast{1.f, 0.05f};
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Pt1<float> vu_pt1_slow{1.f, 1.f};
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void VuMeterApp::init()
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{
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FastLED.setBrightness(100);
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}
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void VuMeterApp::deinit()
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{
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}
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void VuMeterApp::loop()
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{
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if (micros() - last_sample_time >= 500)
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{
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last_sample_time = micros();
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int32_t sample = get_sample();
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float in = sample * sample;
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sample_counter++;
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rms_avg += (in - rms_avg) / (sample_counter + 1);
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}
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EVERY_N_MILLIS(10)
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{
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float vu = 20 * log10f(rms_avg);
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vu_filt = vu_pt1_fast.update(vu, 0.01f);
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vu_filt_slow = vu_pt1_slow.update(vu_filt, 0.01f);
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// Serial.println(vu);
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int max_led = vu_filt;
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int top_led = vu_filt_slow;
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max_led = max_led > 0xFF ? 0xFF : max_led;
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if (top_led < max_led)
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{
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vu_pt1_slow.y_n1 = vu_filt;
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top_led = max_led;
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}
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fill_solid(leds, NUM_LEDS, CRGB::Black);
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for (int i = 0; i < max_led; i++)
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{
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int idx = map(i, 0, NUM_LEDS, 0, 0xFF);
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leds[i] = ColorFromPalette(RainbowColors_p, idx);
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}
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leds[top_led] = CRGB::White;
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FastLED.show();
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rms_avg = 0.0f;
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sample_counter = 0;
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}
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} |