96 lines
2.4 KiB
C++
96 lines
2.4 KiB
C++
/*
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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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** UNO: MOSI - pin 11, MISO - pin 12, CLK - pin 13, CS - pin 4 (CS pin can be changed)
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and pin #10 (SS) must be an output
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** Mega: MOSI - pin 51, MISO - pin 50, CLK - pin 52, CS - pin 4 (CS pin can be changed)
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and pin #52 (SS) must be an output
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** Leonardo: Connect to hardware SPI via the ICSP header
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created Nov 2010 by David A. Mellis
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modified 9 Apr 2012 by Tom Igoe
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modified 13 June 2012 by Limor Fried
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This example code is in the public domain.
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*/
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#include <SPI.h>
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#include <mySD.h>
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File root;
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// change this to match your SD shield or module;
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// Arduino Ethernet shield: pin 4
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// Adafruit SD shields and modules: pin 10
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// Sparkfun SD shield: pin 8
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const int chipSelect = 4;
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void setup()
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{
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// Open serial communications and wait for port to open:
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Serial.begin(115200);
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while (!Serial) {
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; // wait for serial port to connect. Needed for Leonardo only
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}
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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 Arduino Uno 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(SS, OUTPUT);
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if (!SD.begin(17, 14, 12, 15)) {
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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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root = SD.open("/");
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printDirectory(root, 0);
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Serial.println("done!");
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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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void printDirectory(File dir, int numTabs) {
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// Begin at the start of the directory
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dir.rewindDirectory();
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while(true) {
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File entry = dir.openNextFile();
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if (! entry) {
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// no more files
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//Serial.println("**nomorefiles**");
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break;
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}
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for (uint8_t i=0; i<numTabs; i++) {
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Serial.print('\t'); // we'll have a nice indentation
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}
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// Print the 8.3 name
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Serial.print(entry.name());
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// Recurse for directories, otherwise print the file size
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if (entry.isDirectory()) {
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Serial.println("/");
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printDirectory(entry, numTabs+1);
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} else {
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// files have sizes, directories do not
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Serial.print("\t\t");
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Serial.println(entry.size(), DEC);
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}
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entry.close();
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}
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}
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