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#include <stdio.h> |
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#include <string.h> |
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#include <sys/unistd.h> |
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#include <sys/stat.h> |
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#include "esp_err.h" |
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#include "esp_log.h" |
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#include "esp_vfs_fat.h" |
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#include "driver/sdmmc_host.h" |
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#include "driver/sdspi_host.h" |
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#include "sdmmc_cmd.h" |
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#include "storage.h" |
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static const char *TAG = "storage"; |
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// This example can use SDMMC and SPI peripherals to communicate with SD card. |
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// By default, SDMMC peripheral is used. |
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// To enable SPI mode, uncomment the following line: |
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//#define USE_SPI_MODE |
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// When testing SD and SPI modes, keep in mind that once the card has been |
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// initialized in SPI mode, it can not be reinitialized in SD mode without |
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// toggling power to the card. |
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#ifdef USE_SPI_MODE |
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// Pin mapping when using SPI mode. |
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// With this mapping, SD card can be used both in SPI and 1-line SD mode. |
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// Note that a pull-up on CS line is required in SD mode. |
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#define PIN_NUM_MISO ((gpio_num_t)2) |
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#define PIN_NUM_MOSI ((gpio_num_t)15) |
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#define PIN_NUM_CLK ((gpio_num_t)14) |
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#define PIN_NUM_CS ((gpio_num_t)13) |
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#endif //USE_SPI_MODE |
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int storage_init() |
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{ |
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#ifndef USE_SPI_MODE |
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ESP_LOGI(TAG, "Using SDMMC peripheral"); |
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sdmmc_host_t host = SDMMC_HOST_DEFAULT(); |
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// This initializes the slot without card detect (CD) and write protect (WP) signals. |
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// Modify slot_config.gpio_cd and slot_config.gpio_wp if your board has these signals. |
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sdmmc_slot_config_t slot_config = SDMMC_SLOT_CONFIG_DEFAULT(); |
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// To use 1-line SD mode, uncomment the following line: |
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slot_config.width = 1; |
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// GPIOs 15, 2, 4, 12, 13 should have external 10k pull-ups. |
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// Internal pull-ups are not sufficient. However, enabling internal pull-ups |
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// does make a difference some boards, so we do that here. |
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gpio_set_pull_mode((gpio_num_t)15, GPIO_PULLUP_ONLY); // CMD, needed in 4- and 1- line modes |
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gpio_set_pull_mode((gpio_num_t)2, GPIO_PULLUP_ONLY); // D0, needed in 4- and 1-line modes |
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//gpio_set_pull_mode((gpio_num_t)4, GPIO_PULLUP_ONLY); // D1, needed in 4-line mode only |
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//gpio_set_pull_mode((gpio_num_t)12, GPIO_PULLUP_ONLY); // D2, needed in 4-line mode only |
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gpio_set_pull_mode((gpio_num_t)13, GPIO_PULLUP_ONLY); // D3, needed in 4- and 1-line modes |
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#else |
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ESP_LOGI(TAG, "Using SPI peripheral"); |
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sdmmc_host_t host = SDSPI_HOST_DEFAULT(); |
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sdspi_slot_config_t slot_config = SDSPI_SLOT_CONFIG_DEFAULT(); |
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slot_config.gpio_miso = PIN_NUM_MISO; |
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slot_config.gpio_mosi = PIN_NUM_MOSI; |
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slot_config.gpio_sck = PIN_NUM_CLK; |
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slot_config.gpio_cs = PIN_NUM_CS; |
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// This initializes the slot without card detect (CD) and write protect (WP) signals. |
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// Modify slot_config.gpio_cd and slot_config.gpio_wp if your board has these signals. |
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#endif //USE_SPI_MODE |
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// Options for mounting the filesystem. |
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// If format_if_mount_failed is set to true, SD card will be partitioned and |
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// formatted in case when mounting fails. |
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esp_vfs_fat_sdmmc_mount_config_t mount_config = { |
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.format_if_mount_failed = false, |
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.max_files = 5, |
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.allocation_unit_size = 16 * 1024 |
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}; |
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// Use settings defined above to initialize SD card and mount FAT filesystem. |
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// Note: esp_vfs_fat_sdmmc_mount is an all-in-one convenience function. |
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// Please check its source code and implement error recovery when developing |
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// production applications. |
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sdmmc_card_t* card; |
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esp_err_t ret = esp_vfs_fat_sdmmc_mount("/sdcard", &host, &slot_config, &mount_config, &card); |
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if (ret != ESP_OK) { |
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if (ret == ESP_FAIL) { |
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ESP_LOGE(TAG, "Failed to mount filesystem. " |
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"If you want the card to be formatted, set format_if_mount_failed = true."); |
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} else { |
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ESP_LOGE(TAG, "Failed to initialize the card (%s). " |
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"Make sure SD card lines have pull-up resistors in place.", esp_err_to_name(ret)); |
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} |
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return -1; |
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} |
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// Card has been initialized, print its properties |
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sdmmc_card_print_info(stdout, card); |
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return 0; |
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} |