Trouble getting "playFlashRaw" to work on 3.2 and Prop Shield

[PomeroyB]

Hello all,

I am working on a project using a teensy 3.2 and a Prop Shield (lite version). The 3.2 and shield are directly soldered together using header pins.

Sample programs using "AudioPlayMemory" work fine, but trying to extend to "AudioPlaySerialflashRaw" has been giving me trouble.

Here's an image of my Audio System Design:

And here's my source code. Also included in the Arduino Project is the "AudioSampleCashregister" .h and .cpp files.

#include <Audio.h>
#include <Wire.h>
#include <SPI.h>
#include <SD.h>
#include <SerialFlash.h>

// GUItool: begin automatically generated code
AudioPlaySerialflashRaw  playFlashRaw1;  //xy=202,171
AudioPlayMemory          playMem1;       //xy=231,132
AudioMixer4              mixer1;         //xy=444,158
AudioOutputAnalog        dac1;           //xy=609,162
AudioConnection          patchCord1(playFlashRaw1, 0, mixer1, 1);
AudioConnection          patchCord2(playMem1, 0, mixer1, 0);
AudioConnection          patchCord3(mixer1, dac1);
// GUItool: end automatically generated code



// WAV files converted to code by wav2sketch
#include "AudioSampleCashregister.h" // http://www.freesound.org/people/kiddpark/sounds/201159/


void setup() {

  // Audio connections require memory to work.  For more
  // detailed information, see the MemoryAndCpuUsage example
  AudioMemory(10);


  // by default the Teensy 3.1 DAC uses 3.3Vp-p output
  // if your 3.3V power has noise, switching to the
  // internal 1.2V reference can give you a clean signal
  dac1.analogReference(INTERNAL);
  delay(50);             // time for DAC voltage stable
  pinMode(5, OUTPUT);
  digitalWrite(5, HIGH); // turn on the amplifier
  delay(10);             // allow time to wake up

  mixer1.gain(0, 0.4);
  mixer1.gain(1, 0.4);
  
}

void loop() {

  playMem1.play(AudioSampleCashregister);
  
  //playFlashRaw1.play("hard.raw");

  delay(2000);
}

This code works, but when I uncomment the "playFlashRaw1.play("hard.raw");" line, neither the hard.raw file plays, nor does the Cash Register effect.

I generated hard.raw using Audacity -- the original file is a .wav file that is "Mono, 44100hz, 32-bit float". I exported it by going to "File -> Export -> Export Audio". Under "Save as type", I chose "Other Uncompressed Files", and under "Format Options", I chose "Header: RAW (Header-less)", and "Encoding: Signed 16-bit PCM". I am not sure if this is LSB, as that isn't an option given to me.

I used TeensyTransfer to load "hard.raw" onto the Prop Shield's Serial Flash, and checked the contents using the following command:

.\teensytransfer.exe -l
 1590720 hard.raw

My guess is that my converted file is in the wrong format, or I am misunderstanding how to use the SerialFlash in code. Any help would be appreciated

I've attached my raw file in a zip folder below, if anyone wants to take a peek at it.

Thanks!

 

[PomeroyB]

I solved my problem -- I had forgotten to begin the SerialFlash. Whoops.

Including this code:

SerialFlash.begin(FLASH_CS_PIN);

in the setup() loop solved my issue.