LittleFS_Counting.ino

/****************************************************************************************************************************
  LittleFS_Counting.ino - Filesystem wrapper for LittleFS on the Mbed RP2040

  For MBED RP2040-based boards such as Nano_RP2040_Connect, RASPBERRY_PI_PICO, ADAFRUIT_FEATHER_RP2040 and GENERIC_RP2040.
  Written by Khoi Hoang

  Built by Khoi Hoang https://github.com/khoih-prog/LittleFS_Mbed_RP2040
  Licensed under MIT license
*****************************************************************************************************************************/

#define LFS_MBED_RP2040_VERSION_MIN_TARGET      "LittleFS_Mbed_RP2040 v1.1.0"
#define LFS_MBED_RP2040_VERSION_MIN             1001000

#define _LFS_LOGLEVEL_          1
#define RP2040_FS_SIZE_KB       64

#define FORCE_REFORMAT          false

#include <LittleFS_Mbed_RP2040.h>

#define START_COUNT_OVER      false

LittleFS_MBED *myFS;

void setup()
{
  Serial.begin(115200);

  while (!Serial)

    delay(1000);

  Serial.print("\nStart LittleFS_Counting on ");
  Serial.println(BOARD_NAME);
  Serial.println(LFS_MBED_RP2040_VERSION);

#if defined(LFS_MBED_RP2040_VERSION_MIN)

  if (LFS_MBED_RP2040_VERSION_INT < LFS_MBED_RP2040_VERSION_MIN)
  {
    Serial.print("Warning. Must use this example on Version equal or later than : ");
    Serial.println(LFS_MBED_RP2040_VERSION_MIN_TARGET);
  }

#endif

  myFS = new LittleFS_MBED();

  if (!myFS->init())
  {
    Serial.println("LITTLEFS Mount Failed");

    return;
  }

  char fileName[] = MBED_LITTLEFS_FILE_PREFIX "/counts.txt";

#define BUF_SIZE      32

  char buff[BUF_SIZE];
  int count = 1;

#if  START_COUNT_OVER
  Serial.print("Deleting file: ");
  Serial.print(fileName);

  if (remove(fileName) == 0)
  {
    Serial.println(" => OK");
  }
  else
  {
    Serial.println(" => Failed");
  }

#endif

  FILE *file = fopen(fileName, "r");

  if (file)
  {
    Serial.println(" => Open to read OK");

    bzero(buff, BUF_SIZE);

    uint32_t numRead = fread((uint8_t *) buff, BUF_SIZE - 1, 1, file);

    if ( numRead )
    {
      sscanf(buff, "%d", &count);
      //Serial.print("Times have been run = "); Serial.println(count);
    }

    fclose(file);
  }

  Serial.print("Times have been run = ");
  Serial.println(count);

  sprintf(buff, "%d\n", ++count);

  file = fopen(fileName, "w");

  if (file)
  {
    Serial.println(" => Open to write OK");

    fwrite((uint8_t *) buff, 1, BUF_SIZE - 1, file) ;
    fclose(file);
  }
}

void loop()
{
}