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103 lines
3.3 KiB
103 lines
3.3 KiB
/* SignalNoise_float.ino Bob Larkin 19 June 2020
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*
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* Generate White Noise, Pink Noise, Gaussian White Noise and a Sine Wave
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* Combine all four in a adding "mixer", send to Codec and to peak/rms.
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*
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* Following is for all objects enabled (amplitudes non-zero)
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* T3.6 Processor load, measured: 10.6%
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* T4.0 Processor load, measured: 3.2%
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*/
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#include "Audio.h"
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#include "OpenAudio_ArduinoLibrary.h"
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// To work with T4.0 the I2S routine outputs 16-bit integer (I16). Then
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// use Audette I16 to F32 convert. Same below for output, in reverse.
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AudioInputI2S in1;
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AudioSynthNoisePink_F32 pink1;
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AudioSynthNoiseWhite_F32 white1;
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AudioSynthGaussian_F32 gaussian1;
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AudioSynthWaveformSine_F32 sine1;
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AudioMixer4_F32 sum1;
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AudioConvert_F32toI16 cnvrt1; // Left
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AudioConvert_F32toI16 cnvrt2; // Right
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AudioOutputI2S i2sOut;
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AudioAnalyzePeak_F32 peak1;
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AudioAnalyzeRMS_F32 rms1;
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AudioControlSGTL5000 codec;
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AudioConnection_F32 connect1(pink1, 0, sum1, 0);
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AudioConnection_F32 connect2(white1, 0, sum1, 1);
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AudioConnection_F32 connect3(gaussian1, 0, sum1, 2);
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AudioConnection_F32 connect4(sine1, 0, sum1, 3);
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AudioConnection_F32 connect6(sum1, 0, cnvrt1, 0); // Out to the CODEC left
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AudioConnection_F32 connect7(sum1, 0, cnvrt2, 0); // and right
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AudioConnection_F32 connect8(sum1, 0, peak1, 0);
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AudioConnection_F32 connect9(sum1, 0, rms1, 0);
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AudioConnection conI16_2(cnvrt1, 0, i2sOut, 0); // DAC L
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AudioConnection conI16_3(cnvrt2, 0, i2sOut, 1); // DAC R
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// ********* Mini Control Panel *********
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// Off/On switches, 0 for off, 1 for on
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#define WHITE 0
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#define PINK 0
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#define GAUSSIAN 1
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#define SINE 1
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int gainControlDB = -35; // Set gain in dB.
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// *****************************************
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void setup(void) {
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float32_t gain;
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AudioMemory(10);
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AudioMemory_F32(10);
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for (int i=0; i<4; i++) sum1.gain(i, 0.0); // All off
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Serial.begin(1); delay(1000);
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gain = powf( 10.0f, (gainControlDB/20.0f) );
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white1.amplitude(0.5f);
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gaussian1.amplitude(0.5f);
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sine1.frequency(1000.0f);
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sine1.amplitude(0.2f);
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codec.enable();
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delay(10);
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if(PINK) sum1.gain(0, gain);
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else sum1.gain(0, 0.0f);
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if(WHITE) sum1.gain(1, gain);
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else sum1.gain(1, 0.0f);
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if(GAUSSIAN) sum1.gain(2, gain);
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else sum1.gain(2, 0.0f);
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if(SINE) sum1.gain(3, gain);
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else sum1.gain(3, 0.0f);
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}
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void loop(void) {
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// Here is where the adjustment of the volume control could go.
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// And anything else that needs regular attention, other
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// than the audio stream.
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if (rms1.available() ) {Serial.print("RMS ="); Serial.println(rms1.read(), 6);}
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if (peak1.available() ) {Serial.print("P-P ="); Serial.println(peak1.readPeakToPeak(), 6);}
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Serial.print("CPU: Percent Usage, Max: ");
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Serial.print(AudioProcessorUsage());
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Serial.print(", ");
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Serial.print(AudioProcessorUsageMax());
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Serial.print(" ");
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Serial.print("Int16 Memory: ");
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Serial.print(AudioMemoryUsage());
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Serial.print(", ");
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Serial.print(AudioMemoryUsageMax());
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Serial.print(" ");
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Serial.print("Float Memory: ");
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Serial.print(AudioMemoryUsage_F32());
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Serial.print(", ");
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Serial.println(AudioMemoryUsageMax_F32());
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Serial.println();
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delay(1000);
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}
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