STEVAL-MKBOXPRO Audio

Arduino library to support the MP23DB01HP digital microphone. Currently, this library works only with the STEVAL-MKBOXPRO board. It requires a STM32 Core equal to or greater than version 2.6.0.

API

This library can be used to record PCM audio on STEVAL-MKBOXPRO board.

After including PCM.h, initialize the library by calling PCM.Begin:

#include <PCM.h>

void setup()
{
  // [...]
  PCM.Begin();
  // [...]
}

Register the data processing callback using PCM.OnReceive:

void process()
{
  Serial.write((const uint8_t *)RecBuff, PCM_REC_BUFF_SIZE * 2U);
}

void setup()
{
  // [...]
  PCM.OnReceive(process);
  // [...]
}

Start recording PCM audio by passing a non-null pointer of a uint16_t[PCM_REC_BUFF_SIZE] buffer to PCM.Record:

uint16_t RecBuff[PCM_REC_BUFF_SIZE];

void setup()
{
  // [...]
  PCM.Record(RecvBuff);
  // [...]
}

You can pause a recording by calling PCM.Pause; in order to resume it, just call PCM.Resume:

void loop()
{
  // [...]
  if (cmd == '1') PCM.Pause();
  if (cmd == '2') PCM.Resume();
  // [...]
}

In order to deinitialize the library, you can execute PCM.End (if recording, you need first to stop it):

void loop()
{
  // [...]
  if (cmd == '3') {
    if (PCM.GetState() == PCM_AUDIO_IN_STATE_RECORDING) PCM.Stop();
    PCM.End();
    while(1);
  }
  // [...]
}

More Info

Source files can be found at https://github.com/stm32duino/STEVAL-MKBOXPRO-Audio

Take a look at STEVAL-MKBOXPRO examples applications at https://github.com/stm32duino/STEVAL-MKBOXPRO-Examples