teensy-sdfat/SdFat/examples/SdInfo/SdInfo.ino

/*
 * This sketch attempts to initialize an SD card and analyze its structure.
 */
#include <SdFat.h>
/*
 * SD chip select pin.  Common values are:
 *
 * Arduino Ethernet shield, pin 4.
 * SparkFun SD shield, pin 8.
 * Adafruit SD shields and modules, pin 10.
 * Default SD chip select is the SPI SS pin.
 */
const uint8_t SdChipSelect = SS;

Sd2Card card;
SdVolume vol;

// serial output steam
ArduinoOutStream cout(Serial);

// global for card size
uint32_t cardSize;

// global for card erase size
uint32_t eraseSize;
//------------------------------------------------------------------------------
// store error strings in flash
#define sdErrorMsg(msg) sdErrorMsg_P(PSTR(msg));
void sdErrorMsg_P(const char* str) {
  cout << pgm(str) << endl;
  if (card.errorCode()) {
    cout << pstr("SD errorCode: ");
    cout << hex << int(card.errorCode()) << endl;
    cout << pstr("SD errorData: ");
    cout << int(card.errorData()) << dec << endl;
  }
}
//------------------------------------------------------------------------------
uint8_t cidDmp() {
  cid_t cid;
  if (!card.readCID(&cid)) {
    sdErrorMsg("readCID failed");
    return false;
  }
  cout << pstr("\nManufacturer ID: ");
  cout << hex << int(cid.mid) << dec << endl;
  cout << pstr("OEM ID: ") << cid.oid[0] << cid.oid[1] << endl;
  cout << pstr("Product: ");
  for (uint8_t i = 0; i < 5; i++) {
    cout << cid.pnm[i];
  }
  cout << pstr("\nVersion: ");
  cout << int(cid.prv_n) << '.' << int(cid.prv_m) << endl;
  cout << pstr("Serial number: ") << hex << cid.psn << dec << endl;
  cout << pstr("Manufacturing date: ");
  cout << int(cid.mdt_month) << '/';
  cout << (2000 + cid.mdt_year_low + 10 * cid.mdt_year_high) << endl;
  cout << endl;
  return true;
}
//------------------------------------------------------------------------------
uint8_t csdDmp() {
  csd_t csd;
  uint8_t eraseSingleBlock;
  if (!card.readCSD(&csd)) {
    sdErrorMsg("readCSD failed");
    return false;
  }
  if (csd.v1.csd_ver == 0) {
    eraseSingleBlock = csd.v1.erase_blk_en;
    eraseSize = (csd.v1.sector_size_high << 1) | csd.v1.sector_size_low;
  } else if (csd.v2.csd_ver == 1) {
    eraseSingleBlock = csd.v2.erase_blk_en;
    eraseSize = (csd.v2.sector_size_high << 1) | csd.v2.sector_size_low;
  } else {
    cout << pstr("csd version error\n");
    return false;
  }
  eraseSize++;
  cout << pstr("cardSize: ") << 0.000512*cardSize;
  cout << pstr(" MB (MB = 1,000,000 bytes)\n");

  cout << pstr("flashEraseSize: ") << int(eraseSize) << pstr(" blocks\n");
  cout << pstr("eraseSingleBlock: ");
  if (eraseSingleBlock) {
    cout << pstr("true\n");
  } else {
    cout << pstr("false\n");
  }
  return true;
}
//------------------------------------------------------------------------------
// print partition table
uint8_t partDmp() {
  cache_t *p = vol.cacheClear();
  if (!p) {
    sdErrorMsg("cacheClear failed");
    return false;
  }
  if (!card.readBlock(0, p->data)) {
      sdErrorMsg("read MBR failed");
      return false;
  }
  cout << pstr("\nSD Partition Table\n");
  cout << pstr("part,boot,type,start,length\n");
  for (uint8_t ip = 1; ip < 5; ip++) {
    part_t *pt = &p->mbr.part[ip - 1];
    cout << int(ip) << ',' << hex << int(pt->boot) << ',' << int(pt->type);
    cout << dec << ',' << pt->firstSector <<',' << pt->totalSectors << endl;
  }
  return true;
}
//------------------------------------------------------------------------------
void volDmp() {
  cout << pstr("\nVolume is FAT") << int(vol.fatType()) << endl;
  cout << pstr("blocksPerCluster: ") << int(vol.blocksPerCluster()) << endl;
  cout << pstr("clusterCount: ") << vol.clusterCount() << endl;
  uint32_t volFree = vol.freeClusterCount();
  cout << pstr("freeClusters: ") <<  volFree << endl;
  float fs = 0.000512*volFree*vol.blocksPerCluster();
  cout << pstr("freeSpace: ") << fs << pstr(" MB (MB = 1,000,000 bytes)\n");
  cout << pstr("fatStartBlock: ") << vol.fatStartBlock() << endl;
  cout << pstr("fatCount: ") << int(vol.fatCount()) << endl;
  cout << pstr("blocksPerFat: ") << vol.blocksPerFat() << endl;
  cout << pstr("rootDirStart: ") << vol.rootDirStart() << endl;
  cout << pstr("dataStartBlock: ") << vol.dataStartBlock() << endl;
  if (vol.dataStartBlock() % eraseSize) {
    cout << pstr("Data area is not aligned on flash erase boundaries!\n");
    cout << pstr("Download and use formatter from www.sdcard.org/consumer!\n");
  }
}
//------------------------------------------------------------------------------
void setup() {
  Serial.begin(9600);
  while(!Serial) {}  // wait for Leonardo

  // use uppercase in hex and use 0X base prefix
  cout << uppercase << showbase << endl;

  // pstr stores strings in flash to save RAM
  cout << pstr("SdFat version: ") << SD_FAT_VERSION << endl;
}
//------------------------------------------------------------------------------
void loop() {
  // read any existing Serial data
  while (Serial.read() >= 0) {}

  // pstr stores strings in flash to save RAM
  cout << pstr("\ntype any character to start\n");
  while (Serial.read() <= 0) {}
  delay(400);  // catch Due reset problem
  
  uint32_t t = millis();
  // initialize the SD card at SPI_HALF_SPEED to avoid bus errors with
  // breadboards.  use SPI_FULL_SPEED for better performance.
  if (!card.init(SPI_HALF_SPEED, SdChipSelect)) {
    sdErrorMsg("\ncard.init failed");
    return;
  }
  t = millis() - t;
  
  cardSize = card.cardSize();
  if (cardSize == 0) {
    sdErrorMsg("cardSize failed");
    return;
  }
  cout << pstr("\ninit time: ") << t << " ms" << endl;
  cout << pstr("\nCard type: ");
  switch (card.type()) {
    case SD_CARD_TYPE_SD1:
      cout << pstr("SD1\n");
      break;

    case SD_CARD_TYPE_SD2:
      cout << pstr("SD2\n");
      break;

    case SD_CARD_TYPE_SDHC:
      if (cardSize < 70000000) {
        cout << pstr("SDHC\n");
      } else {
        cout << pstr("SDXC\n");
      }
      break;

    default:
      cout << pstr("Unknown\n");
  }
  if (!cidDmp()) return;
  if (!csdDmp()) return;
  if (!partDmp()) return;
  if (!vol.init(&card)) {
    sdErrorMsg("\nvol.init failed");
    return;
  }
  volDmp();
}