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libraries/audio-tools/examples/examples-dsp/examples-maximilian/08-Counting2/08-Counting2.ino

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+// This example shows how you can create a basic counter with a phasor.
+// A phasor oscillator can create a ramp between any two values.
+// It takes three inputs - frequency, start value and stop value.
+// These are all double precision floats, so it's a continuous slide.
+// If you write it into an integer, it will round it off for you.
+// This creates a bunch of steps.
+
+#include "AudioTools.h"
+#include "AudioTools/AudioLibs/MaximilianDSP.h"
+
+// Define Arduino output
+I2SStream out;
+Maximilian maximilian(out);
+
+// Maximilian
+maxiOsc myCounter,mySquare;//these oscillators will help us count and play sound
+int CurrentCount;//we're going to put the current count in this variable so that we can use it more easily.
+
+
+void setup() {//some inits
+    // setup logging
+    Serial.begin(115200);
+    AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
+
+    // setup audio output
+    auto cfg = out.defaultConfig(TX_MODE);
+    out.begin(cfg);
+    maximilian.begin(cfg);
+}
+
+void play(float *output) {
+    
+    // Here you can see that CurrentCount is an int. It's taking the continuous output of the phasor and convering it.
+    // You don't need to explicityly 'cast' (i.e. change) the value from a float to an int.
+    // It happens automagically in these cases.
+    
+    // Once every second, CurrentCount counts from 1 until it gets to 9, then resets itself.
+    // When it reaches 9 it resets, so the values you get are 1-8.
+    
+    CurrentCount=myCounter.phasorBetween(1.0, 1.0, 9.0);//phasor can take three arguments; frequency, start value and end value.
+    
+    // If we multiply the output of CurrentCount by 100, we get 100,200,300,400,500,600,700,800 in that order.
+    // These become the frequency of the oscillator.
+    // In this case, the oscillator is an antialiased sawtooth wave. Yum.
+    output[0]=mySquare.sawn(CurrentCount*100);
+    output[1]=output[0];
+
+}
+
+// Arduino loop
+void loop() {
+    maximilian.copy();
+}