Teensy3.6 SD Card

Development Platforms
1

HI,
I am experimenting with the SD card with Teensy3.6. I am trying to build the example program given here. I copied the contents of the .ino file into src/main.cpp in platformIO project. I get the following error while building.

Code:

#include <Arduino.h>
#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 & 4.1 on-board: BUILTIN_SDCARD
// Wiz820+SD board: pin 4
// Teensy 2.0: pin 0
// Teensy++ 2.0: pin 20
const int chipSelect = BUILTIN_SDCARD;

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.
  }


  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) {
  
}

Error:

src/main.cpp: In function 'void setup()':
src/main.cpp:114:23: error: no matching function for call to 'SdFile::openRoot(SdVolume&)'
   root.openRoot(volume);
                       ^
In file included from /home/cryoschrome/.platformio/packages/framework-arduinoteensy/libraries/SdFat/src/FsLib/FsLib.h:32:0,
                 from /home/cryoschrome/.platformio/packages/framework-arduinoteensy/libraries/SdFat/src/SdFat.h:35,
                 from /home/cryoschrome/.platformio/packages/framework-arduinoteensy/libraries/SD/src/SD.h:27,
                 from src/main.cpp:23:
/home/cryoschrome/.platformio/packages/framework-arduinoteensy/libraries/SdFat/src/FsLib/FsFile.h:458:8: note: candidate: bool FsBaseFile::openRoot(FsVolume*)
   bool openRoot(FsVolume* vol);
        ^
/home/cryoschrome/.platformio/packages/framework-arduinoteensy/libraries/SdFat/src/FsLib/FsFile.h:458:8: note:   no known conversion for argument 1 from 'SdVolume' to 'FsVolume*'

The program build and works fine on Arduino IDE.
Any help is appreciated.
Thank you!

2

The repo does not provide an implementation of openRoot when looking at the search results, although the class is defined there.

So I guess it’s not valid to comment in that originally commented out line of code.

Ask the library developer via a Github issue above to make sure.

3

Alternatively, for printing out the file structure, use the code from the other example.

4

Thank you for the quick reply @maxgerhardt!
I used the code in the master branch where the lines were not commented out.

5

At the default branch (=“Juse_Use_SdFat”), these lines are commented out

If you use the master branch’s example, you have to match the SD card library to the master too, e.g. with lib_deps = SD = https://github.com/PaulStoffregen/SD/archive/refs/heads/master.zip. However master is behind the default branch, so you shouldn’t actually use it…