Problems with SD-CARD

Created Mon, 07 Nov 2011 10:41:18 +0000 by picluigi

picluigi

Mon, 07 Nov 2011 10:41:18 +0000

Hi. I am using chipKit 32MAX with Mpide 20110822. This sketch does not work.

This example code is in the public domain.
 	 
 */
 
#include <SD.h>

File myFile;

void setup()
{
  Serial.begin(19200);
  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("datalog.txt", FILE_WRITE);
  
  // if the file opened okay, write to it:
  if (myFile) {
    Serial.print("Writing to datalog.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 datalog.txt");
  }
  
  // re-open the file for reading:
  myFile = SD.open("datalog.txt");
  if (myFile) {
    Serial.println("datalog.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 datalog.txt");
  }
}

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

When it comes to line n. 48 crashes: myFile.println ("testing 1, 2, 3."); In SD-Card does not write "testing 1,2,3,." I do not understand why. Can anyone help me? Thank you

rasmadrak

Mon, 07 Nov 2011 13:47:16 +0000

Hi there,

Please see the other thread about SD cards (four pages etc). There seem to be a bug in the SD-card library.