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PDMSerialPlotter stereo version #149

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Merged
merged 1 commit into from
Mar 9, 2021
Merged

PDMSerialPlotter stereo version #149

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16 changes: 14 additions & 2 deletions libraries/PDM/examples/PDMSerialPlotter/PDMSerialPlotter.ino
100644 → 100755
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Original file line number Diff line number Diff line change
Expand Up @@ -12,8 +12,14 @@

#include <PDM.h>

// default number of output channels
static const char channels = 1;

// default PCM output frequency
static const int frequency = 16000;

// Buffer to read samples into, each sample is 16-bits
short sampleBuffer[256];
short sampleBuffer[512];

// Number of audio samples read
volatile int samplesRead;
Expand All @@ -33,7 +39,7 @@ void setup() {
// - one channel (mono mode)
// - a 16 kHz sample rate for the Arduino Nano 33 BLE Sense
// - a 32 kHz or 64 kHz sample rate for the Arduino Portenta Vision Shield
if (!PDM.begin(1, 16000)) {
if (!PDM.begin(channels, frequency)) {
Serial.println("Failed to start PDM!");
while (1);
}
Expand All @@ -45,6 +51,12 @@ void loop() {

// Print samples to the serial monitor or plotter
for (int i = 0; i < samplesRead; i++) {
if(channels == 2) {
Serial.print("L:");
Serial.print(sampleBuffer[i]);
Serial.print(" R:");
i++;
}
Serial.println(sampleBuffer[i]);
}

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