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112 lines
3.1 KiB
C++
112 lines
3.1 KiB
C++
/*
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SD card test
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This example shows how use the utility libraries on which the'
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SD library is based in order to get info about your SD card.
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Very useful for testing a card when you're not sure whether its working or not.
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The circuit:
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SD card attached to SPI bus as follows:
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** MOSI - pin 11 on Arduino Uno/Duemilanove/Diecimila
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** MISO - pin 12 on Arduino Uno/Duemilanove/Diecimila
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** CLK - pin 13 on Arduino Uno/Duemilanove/Diecimila
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** CS - depends on your SD card shield or module.
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Pin 4 used here for consistency with other Arduino examples
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created 28 Mar 2011
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by Limor Fried
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modified 9 Apr 2012
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by Tom Igoe
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*/
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// include the SD library:
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#include <SPI.h>
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#include <SD.h>
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// set up variables using the SD utility library functions:
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Sd2Card card;
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SdVolume volume;
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SdFile root;
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// change this to match your SD shield or module;
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// Arduino Ethernet shield: pin 4
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// Adafruit SD shields and modules: pin 10
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// Sparkfun SD shield: pin 8
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const int chipSelect = 4;
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void setup() {
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// Open serial communications and wait for port to open:
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Serial.begin(9600);
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while (!Serial) {
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; // wait for serial port to connect. Needed for Leonardo only
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}
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Serial.print("\nInitializing SD card...");
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// we'll use the initialization code from the utility libraries
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// since we're just testing if the card is working!
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if (!card.init(SPI_HALF_SPEED, chipSelect)) {
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Serial.println("initialization failed. Things to check:");
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Serial.println("* is a card inserted?");
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Serial.println("* is your wiring correct?");
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Serial.println("* did you change the chipSelect pin to match your shield or module?");
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return;
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} else {
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Serial.println("Wiring is correct and a card is present.");
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}
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// print the type of card
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Serial.print("\nCard type: ");
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switch (card.type()) {
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case SD_CARD_TYPE_SD1:
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Serial.println("SD1");
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break;
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case SD_CARD_TYPE_SD2:
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Serial.println("SD2");
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break;
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case SD_CARD_TYPE_SDHC:
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Serial.println("SDHC");
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break;
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default:
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Serial.println("Unknown");
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}
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// Now we will try to open the 'volume'/'partition' - it should be FAT16 or FAT32
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if (!volume.init(card)) {
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Serial.println("Could not find FAT16/FAT32 partition.\nMake sure you've formatted the card");
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return;
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}
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// print the type and size of the first FAT-type volume
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uint32_t volumesize;
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Serial.print("\nVolume type is FAT");
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Serial.println(volume.fatType(), DEC);
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Serial.println();
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volumesize = volume.blocksPerCluster(); // clusters are collections of blocks
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volumesize *= volume.clusterCount(); // we'll have a lot of clusters
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volumesize *= 512; // SD card blocks are always 512 bytes
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Serial.print("Volume size (bytes): ");
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Serial.println(volumesize);
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Serial.print("Volume size (Kbytes): ");
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volumesize /= 1024;
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Serial.println(volumesize);
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Serial.print("Volume size (Mbytes): ");
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volumesize /= 1024;
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Serial.println(volumesize);
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Serial.println("\nFiles found on the card (name, date and size in bytes): ");
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root.openRoot(volume);
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// list all files in the card with date and size
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root.ls(LS_R | LS_DATE | LS_SIZE);
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}
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void loop(void) {
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}
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