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bug fixes to SD library examples
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@ -34,7 +34,7 @@ void setup()
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Serial.print("Initializing SD card...");
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// make sure that the default chip select pin is set to
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// output, even if you don't use it:
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// pinMode(10, OUTPUT);
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pinMode(10, OUTPUT);
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// see if the card is present and can be initialized:
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if (!SD.begin(chipSelect)) {
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@ -29,48 +29,50 @@ void setup()
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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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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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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_TRUNCATE);
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myFile.close();
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myFile = SD.open("example.txt", FILE_TRUNCATE);
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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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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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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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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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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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// nothing happens after setup finishes.
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}
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@ -30,7 +30,8 @@ void setup()
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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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