ESP32 Forum

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    ESP_LOGI(TAG, "Using SDMMC peripheral");
    sdmmc_host_t host = SDMMC_HOST_DEFAULT();

    // To use 1-line SD mode, uncomment the following line:
    host.flags = SDMMC_HOST_FLAG_1BIT;

    // This initializes the slot without card detect (CD) and write protect (WP) signals.
    // Modify slot_config.gpio_cd and slot_config.gpio_wp if your board has these signals.
    sdmmc_slot_config_t slot_config = SDMMC_SLOT_CONFIG_DEFAULT();
	//slot_config.gpio_cd = GPIO_NUM_12;
	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(GPIO_NUM_2, GPIO_PULLUP_ONLY);   // D0, needed in 4- and 1-line modes
	gpio_set_pull_mode(GPIO_NUM_15, GPIO_PULLUP_ONLY);  // CMD, needed in 4- and 1- line modes

	//gpio_set_pull_mode(GPIO_NUM_12, GPIO_PULLUP_ONLY);  // CD

#else
    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 = PIN_NUM_MISO;
    slot_config.gpio_mosi = PIN_NUM_MOSI;
    slot_config.gpio_sck  = PIN_NUM_CLK;
    slot_config.gpio_cs   = PIN_NUM_CS;
    // This initializes the slot without card detect (CD) and write protect (WP) signals.
    // Modify slot_config.gpio_cd and slot_config.gpio_wp if your board has these signals.
#endif //USE_SPI_MODE

    // Options for mounting the filesystem.
    // If format_if_mount_failed is set to true, SD card will be partitioned and
    // formatted in case when mounting fails.
    esp_vfs_fat_sdmmc_mount_config_t mount_config = {
        .format_if_mount_failed = true,
        .max_files = 3,
        .allocation_unit_size = 0//16 * 1024
    };

    // Use settings defined above to initialize SD card and mount FAT filesystem.
    // Note: esp_vfs_fat_sdmmc_mount is an all-in-one convenience function.
    // Please check its source code and implement error recovery when developing
    // production applications.
    sdmmc_card_t* card;
    err = esp_vfs_fat_sdmmc_mount("/S", &host, &slot_config, &mount_config, &card);

    ESP_LOGI(TAG, "esp_vfs_fat_sdmmc_mount:%d", err);

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

    // Card has been initialized, print its properties
    sdmmc_card_print_info(stdout, card);

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ESP_LOGI(TAG, "Opening file");
    FILE* f = fopen("/S/hello.txt", "w");
    if (f != NULL)
    {

        int ret = fwrite("Test file", 1, strlen("Test file"), f);
        fclose(f);
        ESP_LOGI(TAG, "File written:%d", ret);
    }

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E (290) sdmmc_cmd: sdmmc_write_sectors_dma: sdmmc_send_cmd returned 0x109
E (300) diskio_sdmmc: sdmmc_write_blocks failed (265)
E (300) sdmmc_cmd: sdmmc_write_sectors_dma: sdmmc_send_cmd returned 0x109
E (310) diskio_sdmmc: sdmmc_write_blocks failed (265)

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Name: SU02G
Type: SDSC
Speed: default speed
Size: 1886MB
CSD: ver=0, sector_size=512, capacity=3862528 read_bl_len=10
SCR: sd_spec=2, bus_width=5

Code: Select all

slot_config.gpio_cd = GPIO_NUM_12;
gpio_set_pull_mode(GPIO_NUM_12, GPIO_PULLUP_ONLY);