[STM32G4 SM EVM] Aruino - SD Card 테스트

SM Type EVM 보드를 테스트 할 수 있는 확장 보드중 NEX-EXP 시리즈 보드는 SD Card 소켓이 실장되어 있다.

 

SD Card CS 핀은 SM Type 핀맵 A열 13번에 할당되어 있어 STM32G431의 PB12에 연결된다.

 

 

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SD Card 테스트는 Arduino에서 제공하는 SD 라이브러리를 사용하였다.

https://github.com/arduino-libraries/SD

 

SD Card 정보를 출력하는 기본 예제를 구동해 보자

#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;
const int chipSelect = PB12;

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?");
    Serial.println("Note: press reset button on the board and reopen this Serial Monitor after fixing your issue!");
    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 1 KB)
  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);
  root.close();
}

void loop(void) {
}

 

테스트 결과 SD Card의 파일 정보를 Serial 포트로 출력 하는것을 확인 할 수 있다.

Initializing SD card...Wiring is correct and a card is present.

Card type:         SDHC
Clusters:          1942716
Blocks x Cluster:  16
Total Blocks:      31083456

Volume type is:    FAT32
Volume size (Kb):  15541728
Volume size (Mb):  15177
Volume size (Gb):  14.82

Files found on the card (name, date and size in bytes):
20099F~1.JPG  2018-08-24 18:13:12 2659589
    20CEFE~4.JPG  2018-08-25 12:37:32 2685556
    20D086~2.JPG  2018-08-25 15:40:34 2560021
    20F5A6~3.JPG  2018-08-25 21:26:52 2075688
    203E73~2.JPG  2018-08-24 18:31:44 3534098
    200CBD~5.JPG  2018-08-25 21:42:00 2451751
    208B9E~7.JPG  2018-08-25 22:44:06 2757033