bendns' repos / ArduinoStuff
arduino stuffs
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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.
+ Pin 4 used here for consistency with other Arduino examples
+
+
+ created 28 Mar 2011
+ by Limor Fried
+ modified 9 Apr 2012
+ by Tom Igoe
+*/
+// include the SD library:
+#include <SPI.h>
+#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
+// MKRZero SD: SDCARD_SS_PIN
+const int chipSelect = 4;
+
+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("\nInitializing SD card...");
+
+ // 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 inserted?");
+ Serial.println("* is your wiring correct?");
+ Serial.println("* did you change the chipSelect pin to match your shield or module?");
+ while (1);
+ } else {
+ Serial.println("Wiring is correct and a card is present.");
+ }
+
+ // print the type of card
+ Serial.println();
+ Serial.print("Card 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");
+ while (1);
+ }
+
+ Serial.print("Clusters: ");
+ Serial.println(volume.clusterCount());
+ Serial.print("Blocks x Cluster: ");
+ Serial.println(volume.blocksPerCluster());
+
+ Serial.print("Total Blocks: ");
+ Serial.println(volume.blocksPerCluster() * volume.clusterCount());
+ Serial.println();
+
+ // print the type and size of the first FAT-type volume
+ uint32_t volumesize;
+ Serial.print("Volume type is: FAT");
+ Serial.println(volume.fatType(), DEC);
+
+ volumesize = volume.blocksPerCluster(); // clusters are collections of blocks
+ volumesize *= volume.clusterCount(); // we'll have a lot of clusters
+ volumesize /= 2; // SD card blocks are always 512 bytes (2 blocks are 1KB)
+ Serial.print("Volume size (Kb): ");
+ Serial.println(volumesize);
+ Serial.print("Volume size (Mb): ");
+ volumesize /= 1024;
+ Serial.println(volumesize);
+ Serial.print("Volume size (Gb): ");
+ Serial.println((float)volumesize / 1024.0);
+
+ 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) {
+}