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Topic: LC Studio SD Reader and Mega 2560 (Read 2347 times) previous topic - next topic

uobstudent

I'm new to SD card readers and I'm unable to get my SD card to initialize using the code from the arduino website.
The LC Studio reader is connected to the Mega 2560 as follows:

MISO - 50
MOSI - 51
SCK - 52
CS - 53

I've tried using one or both 3.3 and 5v and both or one ground.
The card is a sandisk extreme ii 1 gb and is formatted by windows 7 to FAT32.

This is the  complete code:

#include <SD.h>

File myFile;

void setup()
{
// 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("Initializing SD card...");
  // On the Ethernet Shield, CS is pin 4. It's set as an output by default.
  // Note that even if it's not used as the CS pin, the hardware SS pin
  // (10 on most Arduino boards, 53 on the Mega) must be left as an output
  // or the SD library functions will not work.
   pinMode(53, OUTPUT);
   
  if (!SD.begin(53)) {
    Serial.println("initialization failed!");
    return;
  }
  Serial.println("initialization done.");

  // open the file. note that only one file can be open at a time,
  // so you have to close this one before opening another.
  myFile = SD.open("test.txt", FILE_WRITE);

  // if the file opened okay, write to it:
  if (myFile) {
    Serial.print("Writing to test.txt...");
    myFile.println("testing 1, 2, 3.");
    // close the file:
    myFile.close();
    Serial.println("done.");
  } else {
    // if the file didn't open, print an error:
    Serial.println("error opening test.txt");
  }

  // re-open the file for reading:
  myFile = SD.open("test.txt");
  if (myFile) {
    Serial.println("test.txt:");
   
    // read from the file until there's nothing else in it:
    while (myFile.available()) {
        Serial.write(myFile.read());
    }
    // close the file:
    myFile.close();
  } else {
    // if the file didn't open, print an error:
    Serial.println("error opening test.txt");
  }
}

void loop()
{
    // nothing happens after setup
}

knut_ny

seen this ? http://forum.arduino.cc/index.php?topic=224855.0

There are several entries regarding this card.  I have shown how I redesigned mine to get them to work (5V)
Ny

kingguy3


seen this ? http://forum.arduino.cc/index.php?topic=224855.0

There are several entries regarding this card.  I have shown how I redesigned mine to get them to work (5V)

Ah...

Now I see why I always have to put a finger and add force(I thought it would help) just for the LC module to recognize a FAT format.
Good thing I passed by this thread. Thought it was just a bad product given to me.

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