Newbie SD card questions

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DaQue

Well-known member
I have an audio adaptor and teensy 3.2 hooked up and get the following output when running the cardinfo example.

Code:
Initializing SD card...initialization failed. Things to check:
* is a card inserted?
* is your wiring correct?
* did you change the chipSelect pin to match your shield or module?

I have tried both 72 Mhz and 24 Mhz compile options with the same result.

I THINK I made the proper changes in the code:

Code:
/*
  SD card test 
   
 This example shows how use the utility libraries on which the'
 SD library is based in order to get info about your SD card.
 Very useful for testing a card when you're not sure whether its working or not.
 	
 The circuit:
  * SD card attached to SPI bus as follows:
 ** MOSI - pin 11 on Arduino Uno/Duemilanove/Diecimila, pin 7 on Teensy with audio board
 ** MISO - pin 12 on Arduino Uno/Duemilanove/Diecimila
 ** CLK - pin 13 on Arduino Uno/Duemilanove/Diecimila, pin 14 on Teensy with audio board
 ** CS - depends on your SD card shield or module - pin 10 on Teensy with audio board
 		Pin 4 used here for consistency with other Arduino examples

 
 created  28 Mar 2011
 by Limor Fried 
 modified 9 Apr 2012
 by Tom Igoe
 */
 // include the SD library:
#include <SD.h>
#include <SPI.h>

// set up variables using the SD utility library functions:
Sd2Card card;
SdVolume volume;
SdFile root;

// change this to match your SD shield or module;
// Arduino Ethernet shield: pin 4
// Adafruit SD shields and modules: pin 10
// Sparkfun SD shield: pin 8
// Teensy audio board: pin 10
// Teensy 3.5 & 3.6 on-board: BUILTIN_SDCARD
// Wiz820+SD board: pin 4
// Teensy 2.0: pin 0
// Teensy++ 2.0: pin 20
const int chipSelect = 10;    

void setup()
{
  //UNCOMMENT THESE TWO LINES FOR TEENSY AUDIO BOARD:
  SPI.setMOSI(7);  // Audio shield has MOSI on pin 7
  SPI.setSCK(14);  // 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. Needed for Leonardo only
  }


  Serial.print("\nInitializing SD card...");


  // we'll use the initialization code from the utility libraries
  // since we're just testing if the card is working!
  if (!card.init(SPI_HALF_SPEED, chipSelect)) {
    Serial.println("initialization failed. Things to check:");
    Serial.println("* is a card inserted?");
    Serial.println("* is your wiring correct?");
    Serial.println("* did you change the chipSelect pin to match your shield or module?");
    return;
  } else {
   Serial.println("Wiring is correct and a card is present."); 
  }

  // print the type of card
  Serial.print("\nCard type: ");
  switch(card.type()) {
    case SD_CARD_TYPE_SD1:
      Serial.println("SD1");
      break;
    case SD_CARD_TYPE_SD2:
      Serial.println("SD2");
      break;
    case SD_CARD_TYPE_SDHC:
      Serial.println("SDHC");
      break;
    default:
      Serial.println("Unknown");
  }

  // Now we will try to open the 'volume'/'partition' - it should be FAT16 or FAT32
  if (!volume.init(card)) {
    Serial.println("Could not find FAT16/FAT32 partition.\nMake sure you've formatted the card");
    return;
  }


  // print the type and size of the first FAT-type volume
  uint32_t volumesize;
  Serial.print("\nVolume type is FAT");
  Serial.println(volume.fatType(), DEC);
  Serial.println();
  
  volumesize = volume.blocksPerCluster();    // clusters are collections of blocks
  volumesize *= volume.clusterCount();       // we'll have a lot of clusters
  if (volumesize < 8388608ul) {
    Serial.print("Volume size (bytes): ");
    Serial.println(volumesize * 512);        // SD card blocks are always 512 bytes
  }
  Serial.print("Volume size (Kbytes): ");
  volumesize /= 2;
  Serial.println(volumesize);
  Serial.print("Volume size (Mbytes): ");
  volumesize /= 1024;
  Serial.println(volumesize);

  
  Serial.println("\nFiles found on the card (name, date and size in bytes): ");
  root.openRoot(volume);
  
  // list all files in the card with date and size
  root.ls(LS_R | LS_DATE | LS_SIZE);
}


void loop(void) {
  
}


Should the card at least report the card type even if its unformatted or formatted incorrectly? Unrelated but it shows the Teensy(R) is inserted correctly I can access the serial flash (erase and hardware tests) and play the tonesweep example.

Latest released Teensyduino and Arduino packages both clean installs two days ago (I had to reformat my Macbook Pro hard drive).
 
Last edited:
I ran it just now on a Teensy 3.2 with the audio shield and a known good 32G card. Here's the result.

Code:
Initializing SD card...Wiring is correct and a card is present.

Card type: SDHC

Volume type is FAT32

Volume size (Kbytes): 31248384
Volume size (Mbytes): 30516

Files found on the card (name, date and size in bytes): 
NIKON001.DSC  2016-10-29 04:05:44 512
DCIM/         2016-10-29 04:05:44
  100D5100/     2016-11-01 00:05:20
    DSC_0001.JPG  2016-11-01 00:05:20 6058942
  101D5600/     2017-04-01 07:11:22
    DSC_0001.JPG  2017-04-01 07:11:22 5000892
    DSC_0002.JPG  2017-04-01 08:18:50 11155047
_~1.TRA       2016-10-29 05:09:16 4096
NIKON/        2017-04-01 07:08:28
  D5600/        2017-04-01 07:08:28
TRASHE~1/     2016-10-29 05:09:16
FSEVEN~1/     2016-10-29 05:09:16
  FSEVEN~1      2016-10-29 05:10:08 36
  636573~1      2016-10-29 05:10:08 104
  636573~2      2016-10-29 05:10:08 75
D5100_~1.BIN  2013-10-10 21:33:38 11796610
SDTEST1.WAV   2017-08-18 17:29:30 34292968
SDTEST2.WAV   2017-08-18 17:29:32 42529580
SDTEST3.WAV   2017-08-18 17:29:34 41117416
SDTEST4.WAV   2017-08-18 17:29:36 63507688
 
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