src/filesystem.cpp - main - singlwolf/Radiola-2S3

src/filesystem.cpp
209 строк6 KB
SinglWolf
Public access
27 мар 2026, 07:00
27 мар 2026, 07:00642fcfc

#include "filesystem.h"
#include "fs_system.h"
#include <lvgl.h>
#include <FS.h>

struct eFile
{
  File file;
};
extern "C"
{
  static void *fs_open(lv_fs_drv_t *drv, const char *path, lv_fs_mode_t mode);
  static lv_fs_res_t fs_close(lv_fs_drv_t *drv, void *file_p);
  static lv_fs_res_t fs_read(lv_fs_drv_t *drv, void *file_p, void *buf, uint32_t btr, uint32_t *br);
  static lv_fs_res_t fs_write(lv_fs_drv_t *drv, void *file_p, const void *buf, uint32_t btw, uint32_t *bw);
  static lv_fs_res_t fs_seek(lv_fs_drv_t *drv, void *file_p, uint32_t pos, lv_fs_whence_t whence);
  static lv_fs_res_t fs_tell(lv_fs_drv_t *drv, void *file_p, uint32_t *pos_p);
  // static void *fs_dir_open(lv_fs_drv_t *drv, const char *path);
  // static lv_fs_res_t fs_dir_read(lv_fs_drv_t *drv, void *dir_p, char *fn);
  // static lv_fs_res_t fs_dir_close(lv_fs_drv_t *drv, void *dir_p);

  /**********************
   *   STATIC FUNCTIONS
   **********************/
  void init_filesystem(void)
  {
    static lv_fs_drv_t fs_drv;
    lv_fs_drv_init(&fs_drv);

    fs_drv.letter = 'L';
    fs_drv.open_cb = fs_open;
    fs_drv.close_cb = fs_close;
    fs_drv.read_cb = fs_read;
    fs_drv.write_cb = fs_write;
    fs_drv.seek_cb = fs_seek;
    fs_drv.tell_cb = fs_tell;

    fs_drv.dir_close_cb = NULL;
    fs_drv.dir_open_cb = NULL;
    fs_drv.dir_read_cb = NULL;

    fs_drv.cache_size = 4096;

    lv_fs_drv_register(&fs_drv);
  }

  /*Initialize your Storage device and File system.*/
  /**
   * Open a file
   * @param drv       pointer to a driver where this function belongs
   * @param path      path to the file beginning with the driver letter (e.g. S:/folder/file.txt)
   * @param mode      read: FS_MODE_RD, write: FS_MODE_WR, both: FS_MODE_RD | FS_MODE_WR
   * @return          a file descriptor or NULL on error
   */
  static void *fs_open(lv_fs_drv_t *drv, const char *path, lv_fs_mode_t mode)
  {
    LV_UNUSED(drv);

    const char *flags = "";

    if (mode & LV_FS_MODE_WR)
    {
      flags = FILE_WRITE;
    }
    else
    {
      flags = FILE_READ;
    }

    File f;
    if (xSemaphoreTake(sdog._spiMutex, portMAX_DELAY))
    {
      if (FileFS->exists(path))
      {
        f = FileFS->open(path, flags);
      }
      xSemaphoreGive(sdog._spiMutex);
    }

    if (!f)
    {
      return NULL;
    }

    eFile *lf = new eFile{f};

    return (void *)lf;
  }

  /**
   * Close an opened file
   * @param drv       pointer to a driver where this function belongs
   * @param file_p    pointer to a file_t variable. (opened with fs_open)
   * @return          LV_FS_RES_OK: no error or  any error from @lv_fs_res_t enum
   */
  static lv_fs_res_t fs_close(lv_fs_drv_t *drv, void *file_p)
  {
    LV_UNUSED(drv);
    eFile *lf = (eFile *)file_p;

    if (xSemaphoreTake(sdog._spiMutex, portMAX_DELAY))
    {
      lf->file.close();
      xSemaphoreGive(sdog._spiMutex);
    }

    delete lf;
    return LV_FS_RES_OK;
  }

  /**
   * Read data from an opened file
   * @param drv       pointer to a driver where this function belongs
   * @param file_p    pointer to a file_t variable.
   * @param buf       pointer to a memory block where to store the read data
   * @param btr       number of Bytes To Read
   * @param br        the real number of read bytes (Byte Read)
   * @return          LV_FS_RES_OK: no error or  any error from @lv_fs_res_t enum
   */
  static lv_fs_res_t fs_read(lv_fs_drv_t *drv, void *file_p, void *buf, uint32_t btr, uint32_t *br)
  {
    LV_UNUSED(drv);
    eFile *lf = (eFile *)file_p;

    if (xSemaphoreTake(sdog._spiMutex, portMAX_DELAY))
    {
      *br = lf->file.read((uint8_t *)buf, btr);
      xSemaphoreGive(sdog._spiMutex);
    }

    return (int32_t)(*br) < 0 ? LV_FS_RES_UNKNOWN : LV_FS_RES_OK;
  }

  /**
   * Write into a file
   * @param drv       pointer to a driver where this function belongs
   * @param file_p    pointer to a file_t variable
   * @param buf       pointer to a buffer with the bytes to write
   * @param btw       Bytes To Write
   * @param bw        the number of real written bytes (Bytes Written). NULL if unused.
   * @return          LV_FS_RES_OK: no error or  any error from @lv_fs_res_t enum
   */
  static lv_fs_res_t fs_write(lv_fs_drv_t *drv, void *file_p, const void *buf, uint32_t btw, uint32_t *bw)
  {
    LV_UNUSED(drv);
    eFile *lf = (eFile *)file_p;

    if (xSemaphoreTake(sdog._spiMutex, portMAX_DELAY))
    {
      *bw = lf->file.write((uint8_t *)buf, btw);
      xSemaphoreGive(sdog._spiMutex);
    }

    return (int32_t)(*bw) < 0 ? LV_FS_RES_UNKNOWN : LV_FS_RES_OK;
  }

  /**
   * Set the read write pointer. Also expand the file size if necessary.
   * @param drv       pointer to a driver where this function belongs
   * @param file_p    pointer to a file_t variable. (opened with fs_open )
   * @param pos       the new position of read write pointer
   * @param whence    tells from where to interpret the `pos`. See @lv_fs_whence_t
   * @return          LV_FS_RES_OK: no error or  any error from @lv_fs_res_t enum
   */
  static lv_fs_res_t fs_seek(lv_fs_drv_t *drv, void *file_p, uint32_t pos, lv_fs_whence_t whence)
  {
    LV_UNUSED(drv);
    SeekMode mode = SeekSet;
    /*  if (whence == LV_FS_SEEK_SET)
        mode = SeekSet;
       else */
    if (whence == LV_FS_SEEK_CUR)
      mode = SeekCur;
    else if (whence == LV_FS_SEEK_END)
      mode = SeekEnd;

    eFile *lf = (eFile *)file_p;

    if (xSemaphoreTake(sdog._spiMutex, portMAX_DELAY))
    {
      lf->file.seek(pos, mode);
      xSemaphoreGive(sdog._spiMutex);
    }

    return LV_FS_RES_OK;
  }

  /**
   * Give the position of the read write pointer
   * @param drv       pointer to a driver where this function belongs
   * @param file_p    pointer to a file_t variable.
   * @param pos_p     pointer to to store the result
   * @return          LV_FS_RES_OK: no error or  any error from @lv_fs_res_t enum
   */
  static lv_fs_res_t fs_tell(lv_fs_drv_t *drv, void *file_p, uint32_t *pos_p)
  {
    LV_UNUSED(drv);
    eFile *lf = (eFile *)file_p;

    if (xSemaphoreTake(sdog._spiMutex, portMAX_DELAY))
    {
      *pos_p = lf->file.position();
      xSemaphoreGive(sdog._spiMutex);
    }

    return LV_FS_RES_OK;
  }
}
//