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Diffstat (limited to 'libraries/SD/examples/listfiles')
-rw-r--r-- | libraries/SD/examples/listfiles/listfiles.pde | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/libraries/SD/examples/listfiles/listfiles.pde b/libraries/SD/examples/listfiles/listfiles.pde new file mode 100644 index 0000000..b2435a2 --- /dev/null +++ b/libraries/SD/examples/listfiles/listfiles.pde @@ -0,0 +1,77 @@ +/* + SD card basic file example + + This example shows how to create and destroy an SD card file + The circuit: + * SD card attached to SPI bus as follows: + ** MOSI - pin 11 + ** MISO - pin 12 + ** CLK - pin 13 + ** CS - pin 4 + + created Nov 2010 + by David A. Mellis + updated 2 Dec 2010 + by Tom Igoe + + This example code is in the public domain. + + */ +#include <SD.h> + +File root; + +void setup() +{ + Serial.begin(9600); + Serial.print("Initializing SD card..."); + // On the Ethernet Shield, CS is pin 4. It's set as an output by default. + // Note that even if it's not used as the CS pin, the hardware SS pin + // (10 on most Arduino boards, 53 on the Mega) must be left as an output + // or the SD library functions will not work. + pinMode(10, OUTPUT); + + if (!SD.begin(10)) { + Serial.println("initialization failed!"); + return; + } + 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 + //Serial.println("**nomorefiles**"); + 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); + } + } +} + + + |