SteveFenton
New member
Hi,
I'm currently experimenting to see how many WAV files I can play from the SD Card slot on the Audio Board. I'm using a Teensy 3.2. Arduino IDE 1.6.11 and Teensyduino 1.3.
I understand there you can gain access to an optiized 'read' library for the SDCard by uncommenting the following line in SD_t3.h
//#define USE_TEENSY3_OPTIMIZED_CODE
Unfortunately, when I do this, I receive a message "Unable to access the SD card", so the first SD.Begin() returns false;
Here is my code...
What could be the cause of the SD.Begin returning false please? If I leave the line commented, it all works fine.
Thanks,
Steve.
I'm currently experimenting to see how many WAV files I can play from the SD Card slot on the Audio Board. I'm using a Teensy 3.2. Arduino IDE 1.6.11 and Teensyduino 1.3.
I understand there you can gain access to an optiized 'read' library for the SDCard by uncommenting the following line in SD_t3.h
//#define USE_TEENSY3_OPTIMIZED_CODE
Unfortunately, when I do this, I receive a message "Unable to access the SD card", so the first SD.Begin() returns false;
Here is my code...
Code:
// **************************
// Advanced Microcontroller-based Audio Workshop
//
// Stream as many files as possible from SD card..
//
// WAV files for this and other Tutorials are here:
// http://www.pjrc.com/teensy/td_libs_AudioDataFiles.html
#include <Audio.h>
#include <Wire.h>
#include <SPI.h>
#include <SD.h>
//# include <SD_t3.h> //also tried to include this (as it's included if you add library from the IDE) but the problem //still exists.
#include <SerialFlash.h>
AudioControlSGTL5000 sgtl5000_1;
// GUItool: begin automatically generated code
AudioPlaySdWav playSdWav4; //xy=119,766
AudioPlaySdWav playSdWav2; //xy=120,628
AudioPlaySdWav playSdWav1; //xy=126,571
AudioPlaySdWav playSdWav3; //xy=128,693
AudioPlayMemory playMem1; //xy=142,1377
AudioMixer4 mixer1; //xy=311,638
AudioMixer4 mixer2; //xy=322,734
AudioOutputI2S i2s1; //xy=476,695
AudioConnection patchCord1(playSdWav4, 0, mixer1, 3);
AudioConnection patchCord2(playSdWav4, 1, mixer2, 3);
AudioConnection patchCord3(playSdWav2, 0, mixer1, 1);
AudioConnection patchCord4(playSdWav2, 1, mixer2, 1);
AudioConnection patchCord5(playSdWav1, 0, mixer1, 0);
AudioConnection patchCord6(playSdWav1, 1, mixer2, 0);
AudioConnection patchCord7(playSdWav3, 0, mixer1, 2);
AudioConnection patchCord8(playSdWav3, 1, mixer2, 2);
AudioConnection patchCord9(mixer1, 0, i2s1, 0);
AudioConnection patchCord10(mixer2, 0, i2s1, 1);
// GUItool: end automatically generated code
float VolControl, VolControl2, VolControl3, VolControl4;
void setup() {
Serial.begin(9600);
AudioMemory(10);
sgtl5000_1.enable();
sgtl5000_1.volume(0.4);
SPI.setMOSI(7);
SPI.setSCK(14);
if (!(SD.begin(10))) {
while (1) {
Serial.println("Unable to access the SD card");
delay(500);
}
}
delay(1000);
//Setup Default Start mix
mixer1.gain(0, 0.25);
mixer1.gain(1, 0.25);
mixer1.gain(2, 0.25);
mixer1.gain(3, 0.25);
mixer2.gain(0, 0.25);
mixer2.gain(1, 0.25);
mixer2.gain(2, 0.25);
mixer2.gain(3, 0.25);
}
void loop() {
if (playSdWav1.isPlaying() == false) {
Serial.println("Start playing 1");
playSdWav1.play("SDTEST1.WAV");
delay(10); // wait for library to parse WAV info
}
if (playSdWav2.isPlaying() == false) {
Serial.println("Start playing 2");
playSdWav2.play("SDTEST2.WAV");
delay(10); // wait for library to parse WAV info
}
if (playSdWav3.isPlaying() == false) {
Serial.println("Start playing 3");
playSdWav3.play("SDTEST3.WAV");
delay(10); // wait for library to parse WAV info
}
//if (playSdWav4.isPlaying() == false) {
// Serial.println("Start playing 4");
// playSdWav4.play("SDTEST4.WAV");
// delay(10); // wait for library to parse WAV info
//}
// do nothing while playing...
}What could be the cause of the SD.Begin returning false please? If I leave the line commented, it all works fine.
Thanks,
Steve.