Rev | Line | |
---|
[136] | 1 | /*
|
---|
| 2 | Listfiles
|
---|
| 3 |
|
---|
| 4 | This example shows how print out the files in a
|
---|
| 5 | directory on a SD card
|
---|
| 6 |
|
---|
| 7 | The circuit:
|
---|
| 8 | * SD card attached to SPI bus as follows:
|
---|
| 9 | ** MOSI - pin 11
|
---|
| 10 | ** MISO - pin 12
|
---|
| 11 | ** CLK - pin 13
|
---|
| 12 | ** CS - pin 4
|
---|
| 13 |
|
---|
| 14 | created Nov 2010
|
---|
| 15 | by David A. Mellis
|
---|
| 16 | modified 9 Apr 2012
|
---|
| 17 | by Tom Igoe
|
---|
| 18 | modified 2 Feb 2014
|
---|
| 19 | by Scott Fitzgerald
|
---|
| 20 |
|
---|
| 21 | This example code is in the public domain.
|
---|
| 22 |
|
---|
| 23 | */
|
---|
| 24 | #include <SPI.h>
|
---|
| 25 | #include <SD.h>
|
---|
| 26 |
|
---|
| 27 | File root;
|
---|
| 28 |
|
---|
| 29 | void setup()
|
---|
| 30 | {
|
---|
| 31 | // Open serial communications and wait for port to open:
|
---|
| 32 | Serial.begin(9600);
|
---|
| 33 | while (!Serial) {
|
---|
| 34 | ; // wait for serial port to connect. Needed for Leonardo only
|
---|
| 35 | }
|
---|
| 36 |
|
---|
| 37 | Serial.print("Initializing SD card...");
|
---|
| 38 | // On the Ethernet Shield, CS is pin 4. It's set as an output by default.
|
---|
| 39 | // Note that even if it's not used as the CS pin, the hardware SS pin
|
---|
| 40 | // (10 on most Arduino boards, 53 on the Mega, 14 on the Leonardo) must be left as an output
|
---|
| 41 | // or the SD library functions will not work.
|
---|
| 42 |
|
---|
| 43 | if (!SD.begin(4)) {
|
---|
| 44 | Serial.println("initialization failed!");
|
---|
| 45 | return;
|
---|
| 46 | }
|
---|
| 47 | Serial.println("initialization done.");
|
---|
| 48 |
|
---|
| 49 | root = SD.open("/");
|
---|
| 50 |
|
---|
| 51 | printDirectory(root, 0);
|
---|
| 52 |
|
---|
| 53 | Serial.println("done!");
|
---|
| 54 | }
|
---|
| 55 |
|
---|
| 56 | void loop()
|
---|
| 57 | {
|
---|
| 58 | // nothing happens after setup finishes.
|
---|
| 59 | }
|
---|
| 60 |
|
---|
| 61 | void printDirectory(File dir, int numTabs) {
|
---|
| 62 | while(true) {
|
---|
| 63 |
|
---|
| 64 | File entry = dir.openNextFile();
|
---|
| 65 | if (! entry) {
|
---|
| 66 | // no more files
|
---|
| 67 | break;
|
---|
| 68 | }
|
---|
| 69 | for (uint8_t i=0; i<numTabs; i++) {
|
---|
| 70 | Serial.print('\t');
|
---|
| 71 | }
|
---|
| 72 | Serial.print(entry.name());
|
---|
| 73 | if (entry.isDirectory()) {
|
---|
| 74 | Serial.println("/");
|
---|
| 75 | printDirectory(entry, numTabs+1);
|
---|
| 76 | } else {
|
---|
| 77 | // files have sizes, directories do not
|
---|
| 78 | Serial.print("\t\t");
|
---|
| 79 | Serial.println(entry.size(), DEC);
|
---|
| 80 | }
|
---|
| 81 | entry.close();
|
---|
| 82 | }
|
---|
| 83 | }
|
---|
| 84 |
|
---|
| 85 |
|
---|
| 86 |
|
---|
Note:
See
TracBrowser
for help on using the repository browser.