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OpenAudio_ArduinoLibrary/examples/AudioTestPeakRMS/AudioTestPeakRMS.ino

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/* AudioTestPeakRMS.ino Bob Larkin 2 May 2020
*
* Generates sine wave and measures RMS, Peak and Peak
* to Peak values.
* NOTE: This is for the floating point _F32 versions of
* AnalyzePeak and AnalyzeRMS *NOT* the Teensy Audio Library
* versions with 16-bit Fixed point data blocks.
*/
#include "Audio.h"
#include <OpenAudio_ArduinoLibrary.h>
#include "analyze_peak_f32.h"
#include "analyze_rms_f32.h"
AudioInputI2S i2s1;
AudioSynthWaveformSine_F32 sine1;
AudioAnalyzeRMS_F32 rms1;
AudioAnalyzePeak_F32 peak1;
AudioConnection_F32 patchCord1(sine1, 0, rms1, 0);
AudioConnection_F32 patchCord2(sine1, 0, peak1, 0);
uint16_t n = 0;
void setup(void) {
AudioMemory(5); //allocate Int16 audio data blocks
AudioMemory_F32(5); //allocate Float32 audio data blocks
Serial.begin(300); delay(1000);
// Default amlitude +/- 1.0
sine1.frequency(1000.0);
// Set next to 0 to suppress print errors in update()
rms1.showError(1);
peak1.showError(1);
}
void loop(void) {
if (n & 1) {
while(!rms1.available() ) ; //Wait
Serial.print("RMS value = ");
Serial.println(rms1.read(), 7 );
while(!peak1.available() ) ; //Wait
Serial.print("Peak value = ");
Serial.println(peak1.read(), 7 );
}
else {
while(!rms1.available() ) ; //Wait
Serial.print("RMS value = ");
Serial.println(rms1.read(), 7 );
while(!peak1.available() ) ; //Wait
Serial.print("Peak to peak value = ");
Serial.println(peak1.readPeakToPeak(), 7 );
}
n++;
// The RMS and Peak data collection runs during
// delay() because of hardware interrupts
delay(1000);
}