SD card read by arduino

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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) {

}ur

  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) {

}

SD Card read file using arduino successfully