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103 lines
3.9 KiB
C++
103 lines
3.9 KiB
C++
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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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}
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