AUDIO board internal Mic failure...?

[mcc]

Hi,

Finally I got exactly the same type of microphone, which is shown on the pages of the Audio Shield at www.pjrc.com.

I soldered the microphone onto the board and wanted to do a quick check, whether the microphone "is online" .

For that, the "Recorder" example sketch was taken and freed from all unecessary stuff (since I have no reliable
SDcard interaction still).
I prints all bytes in the data buffer via the serial monitor.
Or at least...it should...

Unfortunately I can't find the bug...either the microphone is demaged (optical check of the soldering is ok) or...the sketch
is buggy:

// Record sound as raw data to a SD card, and play it back.
//
// Requires the audio shield:
//   http://www.pjrc.com/store/teensy3_audio.html
//
// Three pushbuttons need to be connected:
//   Record Button: pin 0 to GND
//   Stop Button:   pin 1 to GND
//   Play Button:   pin 2 to GND
//
// This example code is in the public domain.

#include <Bounce.h>
#include <Audio.h>
#include <Wire.h>
#include <SPI.h>


// GUItool: begin automatically generated code
AudioInputI2S            i2s2;           //xy=105,63
AudioAnalyzePeak         peak1;          //xy=278,108
AudioRecordQueue         queue1;         //xy=281,63
AudioPlaySdRaw           playRaw1;       //xy=302,157
AudioOutputI2S           i2s1;           //xy=470,120
AudioConnection          patchCord1(i2s2, 0, queue1, 0);
AudioConnection          patchCord2(i2s2, 0, peak1, 0);
AudioConnection          patchCord3(playRaw1, 0, i2s1, 0);
AudioConnection          patchCord4(playRaw1, 0, i2s1, 1);
AudioControlSGTL5000     sgtl5000_1;     //xy=265,212
// GUItool: end automatically generated code

// For a stereo recording version, see this forum thread:
// https://forum.pjrc.com/threads/46150?p=158388&viewfull=1#post158388

// A much more advanced sound recording and data logging project:
// https://github.com/WMXZ-EU/microSoundRecorder
// https://github.com/WMXZ-EU/microSoundRecorder/wiki/Hardware-setup
// https://forum.pjrc.com/threads/52175?p=185386&viewfull=1#post185386




// which input on the audio shield will be used?
//const int myInput = AUDIO_INPUT_LINEIN;
const int myInput = AUDIO_INPUT_MIC;


// Remember which mode we're doing
int mode = 1;  // 0=stopped, 1=recording, 2=playing


void setup() {

  // Audio connections require memory, and the record queue
  // uses this memory to buffer incoming audio.
  AudioMemory(60);

  // Enable the audio shield, select input, and enable output
  sgtl5000_1.enable();
  sgtl5000_1.inputSelect(myInput);
  sgtl5000_1.volume(0.5);
  startRecording();
}


void loop() {

  // If we're playing or recording, carry on...
  if (mode == 1) {
    continueRecording();
  }

  // when using a microphone, continuously adjust gain
  if (myInput == AUDIO_INPUT_MIC) adjustMicLevel();
}


void startRecording() {
  Serial.println("startRecording");
  mode=1;
 }

void continueRecording() {
  if (queue1.available() >= 2) {
    byte buffer[512];
    // Fetch 2 blocks from the audio library and copy
    // into a 512 byte buffer.  The Arduino SD library
    // is most efficient when full 512 byte sector size
    // writes are used.
    memcpy(buffer, queue1.readBuffer(), 256);
    queue1.freeBuffer();
    memcpy(buffer+256, queue1.readBuffer(), 256);
    queue1.freeBuffer();
    int i;
    for( i=0 ; i< 512 ; i++ ) {
      Serial.print( buffer[i], HEX );
    }
   }
}

void stopRecording() {
  Serial.println("stopRecording");
   mode = 0;
}


void startPlaying() {
  Serial.println("startPlaying");
  mode = 2;
}

void continuePlaying() {
  if (!playRaw1.isPlaying()) {
    mode = 0;
  }
}

void stopPlaying() {
  Serial.println("stopPlaying");
  mode = 0;
}

void adjustMicLevel() {
  // TODO: read the peak1 object and adjust sgtl5000_1.micGain()
  // if anyone gets this working, please submit a github pull request :-)
}

Is there anything, which I should program differently so the microphone can be read?

Thanks a lot for any help in advance!
Cheers!
Meino

 

[mcc]

Hi,

in the audio tutorial I found the "Mic Check" sketch, which works for me and proofs, that the mic is working!

Cheers!
Meino