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Arduino/libraries/SD/examples/Files/Files.pde

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#include <SD.h>
File f;
void setup()
{
Serial.begin(9600);
Serial.print("Initializing SD card...");
// On the Ethernet Shield, CS is pin 4. 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.
if (!SD.begin(4)) {
Serial.println("failed!");
return;
}
Serial.println("done.");
if (SD.exists("example.txt")) Serial.println("example.txt exists.");
else Serial.println("example.txt doesn't exist.");
Serial.println("Creating example.txt...");
f = SD.open("example.txt", true);
f.close();
if (SD.exists("example.txt")) Serial.println("example.txt exists.");
else Serial.println("example.txt doesn't exist.");
Serial.println("Removing example.txt...");
SD.remove("example.txt");
if (SD.exists("example.txt")) Serial.println("example.txt exists.");
else Serial.println("example.txt doesn't exist.");
}
void loop()
{
}