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root / arduino-1.0 / libraries / SD / examples / Files / Files.ino @ 58d82c77

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/*
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  SD card basic file example
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 This example shows how to create and destroy an SD card file 	
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 The circuit:
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 * SD card attached to SPI bus as follows:
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 ** MOSI - pin 11
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 ** MISO - pin 12
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 ** CLK - pin 13
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 ** CS - pin 4
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 created   Nov 2010
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 by David A. Mellis
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 updated 2 Dec 2010
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 by Tom Igoe
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 This example code is in the public domain.
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 */
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#include <SD.h>
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File myFile;
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void setup()
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{
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  Serial.begin(9600);
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  Serial.print("Initializing SD card...");
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  // On the Ethernet Shield, CS is pin 4. It's set as an output by default.
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  // Note that even if it's not used as the CS pin, the hardware SS pin 
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  // (10 on most Arduino boards, 53 on the Mega) must be left as an output 
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  // or the SD library functions will not work. 
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  pinMode(10, OUTPUT);
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  if (!SD.begin(4)) {
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    Serial.println("initialization failed!");
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    return;
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  }
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  Serial.println("initialization done.");
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  if (SD.exists("example.txt")) {
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    Serial.println("example.txt exists.");
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  }
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  else {
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    Serial.println("example.txt doesn't exist.");
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  }
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  // open a new file and immediately close it:
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  Serial.println("Creating example.txt...");
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  myFile = SD.open("example.txt", FILE_WRITE);
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  myFile.close();
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  // Check to see if the file exists: 
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  if (SD.exists("example.txt")) {
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    Serial.println("example.txt exists.");
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  }
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  else {
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    Serial.println("example.txt doesn't exist.");  
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  }
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  // delete the file:
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  Serial.println("Removing example.txt...");
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  SD.remove("example.txt");
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  if (SD.exists("example.txt")){ 
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    Serial.println("example.txt exists.");
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  }
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  else {
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    Serial.println("example.txt doesn't exist.");  
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  }
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}
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void loop()
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{
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  // nothing happens after setup finishes.
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}
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