#include <SD.h>
// change this to match your SD shield or module;
// Teensy 2.0: pin 0
// Teensy++ 2.0: pin 20
// Wiz820+SD board: pin 4
// Teensy audio board: pin 10
// Teensy 3.5 & 3.6 & 4.1 on-board: BUILTIN_SDCARD
const int chipSelect = 10;
void setup()
{
//Uncomment these lines for Teensy 3.x Audio Shield (Rev C)
SPI.setMOSI(11); // Audio shield has MOSI on pin 7
SPI.setSCK(13); // Audio shield has SCK on pin 14
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect.
}
Serial.print("Initializing SD card...");
if (!SD.begin(chipSelect)) {
Serial.println("initialization failed!");
return;
}
Serial.println("initialization done.");
File root = SD.open("/");
printDirectory(root, 0);
Serial.println("done!");
}
void loop()
{
// nothing happens after setup finishes.
}
void printDirectory(File dir, int numSpaces) {
while (true) {
File entry = dir.openNextFile();
if (!entry) {
//Serial.println("** no more files **");
break;
}
printSpaces(numSpaces);
Serial.print(entry.name());
if (entry.isDirectory()) {
Serial.println("/");
printDirectory(entry, numSpaces + 2);
}
else {
// files have sizes, directories do not
unsigned int n = log10(entry.size());
if (n > 10) n = 10;
printSpaces(50 - numSpaces - strlen(entry.name()) - n);
Serial.print(" ");
Serial.print(entry.size(), DEC);
DateTimeFields datetime;
if (entry.getModifyTime(datetime)) {
printSpaces(4);
printTime(datetime);
}
Serial.println();
}
entry.close();
}
}
void printSpaces(int num) {
for (int i = 0; i < num; i++) {
Serial.print(" ");
}
}
void printTime(const DateTimeFields tm) {
const char* months[12] = {
"January","February","March","April","May","Ju ne",
"July","August","September","October","November"," December"
};
if (tm.hour < 10) Serial.print('0');
Serial.print(tm.hour);
Serial.print(':');
if (tm.min < 10) Serial.print('0');
Serial.print(tm.min);
Serial.print(" ");
Serial.print(tm.mon < 12 ? months[tm.mon] : "???");
Serial.print(" ");
Serial.print(tm.mday);
Serial.print(", ");
Serial.print(tm.year + 1900);
}
I can't be 100% sure but don't think your pins are not aligned correctly between the T4 and the audio shield. See audio shield pinout vs your picture:
View attachment 28960
Particularly note pins on the audio shield versus what's on the T4. YOu have the 5v/G/3.3v pins going to GND/0/1 pins on the audio shield. See this page for some mounting ideas:https://www.pjrc.com/store/teensy3_audio.html
/**
* Audio Guestbook, Copyright (c) 2022 Playful Technology
*
* Tested using a Teensy 4.0 with Teensy Audio Shield, although should work
* with minor modifications on other similar hardware
*
* When handset is lifted, a pre-recorded greeting message is played, followed by a tone.
* Then, recording starts, and continues until the handset is replaced.
* Playback button allows all messages currently saved on SD card through earpiece
*
* Files are saved on SD card as 44.1kHz, 16-bit, mono signed integer RAW audio format
* These can be loaded directly into Audacity (https://www.audacityteam.org/). Or else, converted to WAV/MP3 format using SOX (https://sourceforge.net/projects/sox/)
*
**/
// INCLUDES
// The default "sketchbook" location in which Arduino IDE installs libraries is:
// C:\Users\alast\Documents\Arduino
// However, the TeensyDuino installer installs libraries in:
// C:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries
// To ensure the correct libraries are used when targetting Teensy platform in Arduino IDE, go File->Preferences and change the sketchbook location to avoid conflicts with Arduino libraries.
// When targetting Arduino boards, change it back again to default
#include <Bounce.h>
#include <Audio.h>
#include <Wire.h>
#include <SPI.h>
#include <SD.h>
#include <TimeLib.h>
// DEFINES
// Define pins used by Teensy Audio Shield
#define SDCARD_CS_PIN 10
#define SDCARD_MOSI_PIN 7
#define SDCARD_SCK_PIN 14
// And those used for inputs
#define HOOK_PIN 0
#define PLAYBACK_BUTTON_PIN 1
// GLOBALS
// Audio initialisation code can be generated using the GUI interface at https://www.pjrc.com/teensy/gui/
// Inputs
AudioSynthWaveform waveform1; // To create the "beep" sfx
AudioInputI2S i2s2; // I2S input from microphone on audio shield
AudioPlaySdRaw playRaw1; // Play .RAW audio files saved on SD card
AudioPlaySdWav playWav1; // Play 44.1kHz 16-bit PCM greeting WAV file
// Outputs
AudioRecordQueue queue1; // Creating an audio buffer in memory before saving to SD
AudioMixer4 mixer; // Allows merging several inputs to same output
AudioOutputI2S i2s1; // I2S interface to Speaker/Line Out on Audio shield
// Connections
AudioConnection patchCord1(waveform1, 0, mixer, 0); // wave to mixer
AudioConnection patchCord2(playRaw1, 0, mixer, 1); // raw audio to mixer
AudioConnection patchCord3(playWav1, 0, mixer, 2); // wav file playback mixer
AudioConnection patchCord4(mixer, 0, i2s1, 0); // mixer output to speaker (L)
AudioConnection patchCord5(i2s2, 0, queue1, 0); // mic input to queue (L)
AudioControlSGTL5000 sgtl5000_1;
// Filename to save audio recording on SD card
char filename[15];
// The file object itself
File frec;
// Use long 40ms debounce time on hook switch
Bounce buttonRecord = Bounce(HOOK_PIN, 40);
Bounce buttonPlay = Bounce(PLAYBACK_BUTTON_PIN, 8);
// Keep track of current state of the device
enum Mode {Initialising, Ready, Prompting, Recording, Playing};
Mode mode = Mode::Initialising;
void setup() {
// Note that Serial.begin() is not required for Teensy -
// by default it initialises serial communication at full USB speed
// See https://www.pjrc.com/teensy/td_serial.html
// Serial.begin()
Serial.println(__FILE__ __DATE__);
// Configure the input pins
pinMode(HOOK_PIN, INPUT_PULLUP);
pinMode(PLAYBACK_BUTTON_PIN, INPUT_PULLUP);
// 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();
// Define which input on the audio shield to use (AUDIO_INPUT_LINEIN / AUDIO_INPUT_MIC)
sgtl5000_1.inputSelect(AUDIO_INPUT_MIC);
sgtl5000_1.volume(0.5);
// Play a beep to indicate system is online
waveform1.begin(WAVEFORM_SINE);
waveform1.frequency(440);
waveform1.amplitude(0.9);
wait(250);
waveform1.amplitude(0);
delay(1000);
// Initialize the SD card
SPI.setMOSI(SDCARD_MOSI_PIN);
SPI.setSCK(SDCARD_SCK_PIN);
if (!(SD.begin(SDCARD_CS_PIN))) {
// stop here if no SD card, but print a message
while (1) {
Serial.println("Unable to access the SD card");
delay(500);
}
}
// Value in dB
sgtl5000_1.micGain(15);
// Synchronise the Time object used in the program code with the RTC time provider.
// See https://github.com/PaulStoffregen/Time
setSyncProvider(getTeensy3Time);
// Define a callback that will assign the correct datetime for any file system operations
// (i.e. saving a new audio recording onto the SD card)
FsDateTime::setCallback(dateTime);
mode = Mode::Ready;
}
void loop() {
// First, read the buttons
buttonRecord.update();
buttonPlay.update();
switch(mode){
case Mode::Ready:
// Rising edge occurs when the handset is lifted
if (buttonRecord.fallingEdge()) {
Serial.println("Handset lifted");
mode = Mode::Prompting;
}
else if(buttonPlay.risingEdge()) {
playAllRecordings();
}
break;
case Mode::Prompting:
// Wait a second for users to put the handset to their ear
wait(1000);
// Play the greeting inviting them to record their message
playWav1.play("greeting.wav");
// Wait until the message has finished playing
while (playWav1.isPlaying()) {
// Check whether the handset is replaced
// Serial.println("greeting playing");
buttonRecord.update();
// Handset is replaced
if(buttonRecord.risingEdge()) {
playWav1.stop();
mode = Mode::Ready;
return;
}
}
// Debug message
Serial.println("Starting Recording");
// Play the tone sound effect
waveform1.frequency(440);
waveform1.amplitude(0.9);
wait(250);
waveform1.amplitude(0);
// Start the recording function
startRecording();
break;
case Mode::Recording:
// Handset is replaced
if(buttonRecord.risingEdge()){
// Debug log
Serial.println("Stopping Recording");
// Stop recording
stopRecording();
// Play audio tone to confirm recording has ended
waveform1.frequency(523.25);
waveform1.amplitude(0.9);
wait(50);
waveform1.amplitude(0);
wait(50);
waveform1.amplitude(0.9);
wait(50);
waveform1.amplitude(0);
}
else {
continueRecording();
}
break;
case Mode::Playing:
break;
}
}
void startRecording() {
// Find the first available file number
for (uint8_t i=0; i<9999; i++) {
// Format the counter as a five-digit number with leading zeroes, followed by file extension
snprintf(filename, 11, " %05d.RAW", i);
// Create if does not exist, do not open existing, write, sync after write
if (!SD.exists(filename)) {
break;
}
}
frec = SD.open(filename, FILE_WRITE);
if(frec) {
Serial.print("Recording to ");
Serial.println(filename);
queue1.begin();
mode = Mode::Recording;
}
else {
Serial.println("Couldn't open file to record!");
}
}
void continueRecording() {
// Check if there is data in the queue
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();
// Write all 512 bytes to the SD card
frec.write(buffer, 512);
}
}
void stopRecording() {
// Stop adding any new data to the queue
queue1.end();
// Flush all existing remaining data from the queue
while (queue1.available() > 0) {
// Save to open file
frec.write((byte*)queue1.readBuffer(), 256);
queue1.freeBuffer();
}
// Close the file
frec.close();
mode = Mode::Ready;
}
void playAllRecordings() {
// Recording files are saved in the root directory
File dir = SD.open("/");
while (true) {
File entry = dir.openNextFile();
if (!entry) {
// no more files
entry.close();
break;
}
int8_t len = strlen(entry.name());
if (strstr(strlwr(entry.name() + (len - 4)), ".raw")) {
Serial.print("Now playing ");
Serial.println(entry.name());
// Play a short beep before each message
waveform1.amplitude(0.5);
wait(250);
waveform1.amplitude(0);
// Play the file
playRaw1.play(entry.name());
mode = Mode::Playing;
}
entry.close();
while (playRaw1.isPlaying()) {
buttonPlay.update();
buttonRecord.update();
// Button is pressed again
if(buttonPlay.fallingEdge() || buttonRecord.risingEdge()) {
playRaw1.stop();
mode = Mode::Ready;
return;
}
}
}
// All files have been played
mode = Mode::Ready;
}
// Retrieve the current time from Teensy built-in RTC
time_t getTeensy3Time(){
return Teensy3Clock.get();
}
// Callback to assign timestamps for file system operations
void dateTime(uint16_t* date, uint16_t* time, uint8_t* ms10) {
// Return date using FS_DATE macro to format fields.
*date = FS_DATE(year(), month(), day());
// Return time using FS_TIME macro to format fields.
*time = FS_TIME(hour(), minute(), second());
// Return low time bits in units of 10 ms.
*ms10 = second() & 1 ? 100 : 0;
}
// Non-blocking delay, which pauses execution of main program logic,
// but while still listening for input
void wait(unsigned int milliseconds) {
elapsedMillis msec=0;
while (msec <= milliseconds) {
buttonRecord.update();
buttonPlay.update();
if (buttonRecord.risingEdge()) Serial.println("Button (pin 0) Press");
if (buttonPlay.risingEdge()) Serial.println("Button (pin 1) Press");
if (buttonRecord.fallingEdge()) Serial.println("Button (pin 0) Release");
if (buttonPlay.fallingEdge()) Serial.println("Button (pin 1) Release");
}
}
Thanks for the help... I made those changes as suggested ... now it works, I can play the greeting.wav and record *.raw files and play back. However, while compiling I am receiving the following. Can anyone please suggest if the following indicating as errors? If so, how can I resolve?
C:\Users\dasau\OneDrive\80 AURICA\NICOLA\audio-guestbook\audio-guestbook.ino: In function 'void loop()':
C:\Users\dasau\OneDrive\80 AURICA\NICOLA\audio-guestbook\audio-guestbook.ino:131:9: warning: enumeration value 'Initialising' not handled in switch [-Wswitch]
switch(mode){
This one is saying that you are passing entry.name() which is a (const char *) plus some offset to the function strlwr which takes a (char *)C:\Users\dasau\OneDrive\80 AURICA\NICOLA\audio-guestbook\audio-guestbook.ino: In function 'void playAllRecordings()':
C:\Users\dasau\OneDrive\80 AURICA\NICOLA\audio-guestbook\audio-guestbook.ino:265:36: warning: invalid conversion from 'const char*' to 'char*' [-fpermissive]
if (strstr(strlwr(entry.name() + (len - 4)), ".raw")) {
^
In file included from c:\program files (x86)\arduino\hardware\tools\arm\arm-none-eabi\include\stdlib.h:11:0,
from C:\Program Files (x86)\Arduino\hardware\teensy\avr\cores\teensy4/WProgram.h:34,
from C:\Users\dasau\AppData\Local\Temp\arduino_build_780846\pch\Arduino.h:6:
c:\program files (x86)\arduino\hardware\tools\arm\arm-none-eabi\include\string.h:150:7: note: initializing argument 1 of 'char* strlwr(char*)'
char *_EXFUN(strlwr,(char *));
^
This isn't quite correct, and could cause problems...This one is saying that you are passing entry.name() which is a (const char *) plus some offset to the function strlwr which takes a (char *)
Which is complaining that that function might try to change something that is marked const.
Two fixes: strlwr should really be marked as taking: const char * But that is library function so...
Or you tell the compiler that you want to pass it as char *
if (strstr(strlwr((char*)entry.name() + (len - 4)), ".raw")) {
Oh I see, ok so what would be the best option nowadays to build this project? Still 4.0+shield?Audio Guestbook need the SGTL5000 codec chip which is on the audio shield.
Same Audio board for T4.0 and T4.1. If you use T4.1 you have the option of using the SD on the Audio Board or the one on the T4.1.Or is there an audio-sd shield for 4.1?
What is your country?Ok, I see, anyway I realized that neither Teensy 4.0 neither 4.1 are available (at a reasonable price) shipped to my country right now
I will check again on Jan
Thanks everyone!
Spain, ty .What is your country?