Use this to locate files and try to remove stuff which you don't need
File dataFile;
Sd2Card card;
SdVolume volume;
SdFile root;
void setup()
{
// Open serial communications and wait for port to open:
Serial.begin(115200);
pinMode(10, OUTPUT);
if (!card.init(SPI_HALF_SPEED, 4)) {
Serial.println("initialization failed. Things to check:");
Serial.println("* is a card is 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.");
}
if (!volume.init(card)) {
Serial.println("Could not find FAT16/FAT32 partition.\nMake sure you've formatted the card");
return;
}
if (!SD.begin(4)) {
Serial.println("initialization failed!");
return;
}
Serial.println("initialization done.");
dataFile = SD.open("examlpe.CSV", FILE_WRITE); //if I comment this out then the list files works
if (dataFile) {
Serial.print(F("Writing to test.txt..."));
dataFile.println("NOW this FILE CREATED");
dataFile.close();
Serial.println(F("done."));
}
Serial.println("Created File: examlpe.CSV");
// re-open the file for reading:
dataFile = SD.open("examlpe.CSV");
if (dataFile) {
Serial.println("examlpe.CSV:");
// read from the file until there's nothing else in it:
while (dataFile.available()) {
Serial.write(dataFile.read());
}
// close the file:
dataFile.close();
} else {
// if the file didn't open, print an error:
Serial.println("error opening test.txt");
}
}
void loop()
{
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);
}
cheers