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//#define SDCARD_USE_SPI 1

void xSdCardInit()
{
#ifdef SDCARD_USE_SPI
   ESP_LOGI(TAG, "Using SPI peripheral");

   sdmmc_host_t host = SDSPI_HOST_DEFAULT();
   sdspi_slot_config_t slot_config = SDSPI_SLOT_CONFIG_DEFAULT();
   slot_config.gpio_miso = 2;
   slot_config.gpio_mosi = 15;
   slot_config.gpio_sck  = 14;
   slot_config.gpio_cs = 13;
#else // SDCARD_USE_SPI
   ESP_LOGI("xSDCard", "Using SDMMC peripheral");
   sdmmc_host_t host = SDMMC_HOST_DEFAULT();
   //host.max_freq_khz = 19000;
   sdmmc_slot_config_t slot_config = SDMMC_SLOT_CONFIG_DEFAULT();
   // To use 1-line SD mode, uncomment the following line:
   slot_config.width = 1;

   // GPIOs 15, 2, 4, 12, 13 should have external 10k pull-ups.
   // Internal pull-ups are not sufficient. However, enabling internal pull-ups
   // does make a difference some boards, so we do that here.
   gpio_set_pull_mode(15, GPIO_PULLUP_ONLY);     // CMD, needed in 4- and 1- line modes
   gpio_set_pull_mode(2, GPIO_PULLUP_ONLY);      // D0, needed in 4- and 1-line modes
   gpio_set_pull_mode(4, GPIO_PULLUP_ONLY);      // D1, needed in 4-line mode only
   gpio_set_pull_mode(12, GPIO_PULLUP_ONLY);     // D2, needed in 4-line mode only
   gpio_set_pull_mode(13, GPIO_PULLUP_ONLY);   // D3, needed in 4- and 1-line modes
   //gpio_set_pull_mode(14, GPIO_PULLUP_ONLY); // D3, needed in 4- and 1-line modes
#endif // SDCARD_USE_SPI

	esp_vfs_fat_sdmmc_mount_config_t mount_config =
   {
      .format_if_mount_failed = false,
      .max_files = 5,
      .allocation_unit_size = 16 * 1024
   };

   sdmmc_card_t* card;
   esp_err_t ret = esp_vfs_fat_sdmmc_mount("/sd", &host, &slot_config, &mount_config, &card);

   if(ret != ESP_OK)
   {
      if(ret == ESP_FAIL)
      {
         ESP_LOGE("xSDCard",
            "Failed to mount filesystem. "
               "If you want the card to be formatted, set format_if_mount_failed = true.");
      }
      else
      {
         ESP_LOGE("xSDCard",
            "Failed to initialize the card (%s). "
               "Make sure SD card lines have pull-up resistors in place.",
            esp_err_to_name(ret));
      }
   }
   
   sdmmc_card_print_info(stdout, card);
}