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PDM : PDM class

onReceive()

Description

Set the callback function that is called when new PDM data is ready to be read.

Syntax

PDM.onReceive(callback)

Parameters

callback: function that is called when new PDM data is ready to be read

Returns

Nothing

Example

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

// number of samples read
volatile int samplesRead;

// …

  // configure the data receive callback
  PDM.onReceive(onPDMdata);

  // initialize PDM with:
  // - one channel (mono mode)
  // - a 16 kHz sample rate
  if (!PDM.begin(1, 16000)) {
    Serial.println("Failed to start PDM!");
    while (1);
  }


  // …

void onPDMdata() {
  // query the number of bytes available
  int bytesAvailable = PDM.available();

  // read into the sample buffer
  Int bytesRead = PDM.read(sampleBuffer, bytesAvailable);

  // 16-bit, 2 bytes per sample
  samplesRead = bytesRead / 2;
}

…
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