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41 lines
1016 B
Plaintext
41 lines
1016 B
Plaintext
#include <SD.h>
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File f;
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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. Note that even if it's not
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// used as the CS pin, the hardware SS pin (10 on most Arduino boards,
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// 53 on the Mega) must be left as an output or the SD library
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// functions will not work.
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if (!SD.begin(4)) {
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Serial.println("failed!");
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return;
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}
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Serial.println("done.");
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if (SD.exists("example.txt")) Serial.println("example.txt exists.");
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else Serial.println("example.txt doesn't exist.");
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Serial.println("Creating example.txt...");
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f = SD.open("example.txt", true);
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f.close();
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if (SD.exists("example.txt")) Serial.println("example.txt exists.");
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else Serial.println("example.txt doesn't exist.");
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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")) Serial.println("example.txt exists.");
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else Serial.println("example.txt doesn't exist.");
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}
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void loop()
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{
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}
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