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Card debugging sketch

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commit fb0f5519b5eae4d9d3ca72a1db5a01ec782fb2e0 1 parent 82e430c
@ladyada ladyada authored
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108 examples/CardInfo/CardInfo.pde
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+/*
+ SD card test
+
+ This example shows how use the utility libraries on which the'
+ SD library is based in order to get info about your SD card.
+ Very useful for testing a card when you're not sure whether its working or not.
+
+ The circuit:
+ * SD card attached to SPI bus as follows:
+ ** MOSI - pin 11 on Arduino Uno/Duemilanove/Diecimila
+ ** MISO - pin 12 on Arduino Uno/Duemilanove/Diecimila
+ ** CLK - pin 13 on Arduino Uno/Duemilanove/Diecimila
+ ** CS - depends on your SD card shield or module
+
+
+ created 28 Mar 2011
+ by Limor Fried
+ */
+ // include the SD library:
+#include <SD.h>
+
+// set up variables using the SD utility library functions:
+Sd2Card card;
+SdVolume volume;
+SdFile root;
+
+// change this to match your SD shield or module;
+// Arduino Ethernet shield: pin 4
+// Adafruit SD shields and modules: pin 10
+// Sparkfun SD shield: pin 8
+const int chipSelect = 8;
+
+void setup()
+{
+ Serial.begin(9600);
+ Serial.print("\nInitializing 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); // change this to 53 on a mega
+
+
+ // we'll use the initialization code from the utility libraries
+ // since we're just testing if the card is working!
+ if (!card.init(SPI_HALF_SPEED, chipSelect)) {
+ Serial.println("initialization failed. Things to check:");
+ Serial.println("* is a card is inserted?");
+ Serial.println("* Is your wiring correct?");
+ Serial.println("* did you change the chipSelect pin to match your shield or module?");
+ return;
+ } else {
+ Serial.println("Wiring is correct and a card is present.");
+ }
+
+ // print the type of card
+ Serial.print("\nCard type: ");
+ switch(card.type()) {
+ case SD_CARD_TYPE_SD1:
+ Serial.println("SD1");
+ break;
+ case SD_CARD_TYPE_SD2:
+ Serial.println("SD2");
+ break;
+ case SD_CARD_TYPE_SDHC:
+ Serial.println("SDHC");
+ break;
+ default:
+ Serial.println("Unknown");
+ }
+
+ // Now we will try to open the 'volume'/'partition' - it should be FAT16 or FAT32
+ if (!volume.init(card)) {
+ Serial.println("Could not find FAT16/FAT32 partition.\nMake sure you've formatted the card");
+ return;
+ }
+
+
+ // print the type and size of the first FAT-type volume
+ long volumesize;
+ Serial.print("\nVolume type is FAT");
+ Serial.println(volume.fatType(), DEC);
+ Serial.println();
+
+ volumesize = volume.blocksPerCluster(); // clusters are collections of blocks
+ volumesize *= volume.clusterCount(); // we'll have a lot of clusters
+ volumesize *= 512; // SD card blocks are always 512 bytes
+ Serial.print("Volume size (bytes): ");
+ Serial.println(volumesize);
+ Serial.print("Volume size (Kbytes): ");
+ volumesize /= 1024;
+ Serial.println(volumesize);
+ Serial.print("Volume size (Mbytes): ");
+ volumesize /= 1024;
+ Serial.println(volumesize);
+
+
+ Serial.println("\nFiles found on the card (name, date and size in bytes): ");
+ root.openRoot(volume);
+
+ // list all files in the card with date and size
+ root.ls(LS_R | LS_DATE | LS_SIZE);
+}
+
+
+void loop(void) {
+
+}
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