| /* | |
| Listfiles | |
| This example shows how print out the files in a | |
| directory on a SD card | |
| The circuit: | |
| SD card attached to SPI bus as follows: | |
| ** MOSI - pin 11 | |
| ** MISO - pin 12 | |
| ** CLK - pin 13 | |
| ** CS - pin 4 (for MKRZero SD: SDCARD_SS_PIN) | |
| created Nov 2010 | |
| by David A. Mellis | |
| modified 9 Apr 2012 | |
| by Tom Igoe | |
| modified 2 Feb 2014 | |
| by Scott Fitzgerald | |
| This example code is in the public domain. | |
| */ | |
| File root; | |
| void setup() { | |
| // Open serial communications and wait for port to open: | |
| Serial.begin(9600); | |
| while (!Serial) { | |
| ; // wait for serial port to connect. Needed for native USB port only | |
| } | |
| Serial.print("Initializing SD card..."); | |
| if (!SD.begin(4)) { | |
| Serial.println("initialization failed!"); | |
| while (1); | |
| } | |
| Serial.println("initialization done."); | |
| root = SD.open("/"); | |
| printDirectory(root, 0); | |
| Serial.println("done!"); | |
| } | |
| void loop() { | |
| // nothing happens after setup finishes. | |
| } | |
| void printDirectory(File dir, int numTabs) { | |
| while (true) { | |
| File entry = dir.openNextFile(); | |
| if (! entry) { | |
| // no more files | |
| break; | |
| } | |
| for (uint8_t i = 0; i < numTabs; i++) { | |
| Serial.print('\t'); | |
| } | |
| Serial.print(entry.name()); | |
| if (entry.isDirectory()) { | |
| Serial.println("/"); | |
| printDirectory(entry, numTabs + 1); | |
| } else { | |
| // files have sizes, directories do not | |
| Serial.print("\t\t"); | |
| Serial.println(entry.size(), DEC); | |
| } | |
| entry.close(); | |
| } | |
| } | |