123 lines
4.0 KiB
C
123 lines
4.0 KiB
C
#include "SD_SPI.h"
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#define EXAMPLE_MAX_CHAR_SIZE 64
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#define MOUNT_POINT "/sdcard"
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static const char *SD_TAG = "SD";
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uint32_t Flash_Size = 0;
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uint32_t SDCard_Size = 0;
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esp_err_t s_example_write_file(const char *path, char *data)
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{
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ESP_LOGI(SD_TAG, "Opening file %s", path);
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FILE *f = fopen(path, "w");
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if (f == NULL) {
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ESP_LOGE(SD_TAG, "Failed to open file for writing");
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return ESP_FAIL;
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}
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fprintf(f, data);
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fclose(f);
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ESP_LOGI(SD_TAG, "File written");
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return ESP_OK;
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}
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esp_err_t s_example_read_file(const char *path)
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{
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ESP_LOGI(SD_TAG, "Reading file %s", path);
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FILE *f = fopen(path, "r");
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if (f == NULL) {
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ESP_LOGE(SD_TAG, "Failed to open file for reading");
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return ESP_FAIL;
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}
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char line[EXAMPLE_MAX_CHAR_SIZE];
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fgets(line, sizeof(line), f);
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fclose(f);
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// strip newline
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char *pos = strchr(line, '\n');
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if (pos) {
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*pos = '\0';
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}
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ESP_LOGI(SD_TAG, "Read from file: '%s'", line);
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return ESP_OK;
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}
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void SD_Init(void)
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{
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esp_err_t ret;
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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 formatted in case when mounting fails. false true
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esp_vfs_fat_sdmmc_mount_config_t mount_config = {
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.format_if_mount_failed = true,
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.max_files = 5,
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.allocation_unit_size = 16 * 1024
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};
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sdmmc_card_t *card;
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const char mount_point[] = MOUNT_POINT;
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ESP_LOGI(SD_TAG, "Initializing SD card");
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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/sdspi_mount is all-in-one convenience functions.
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// Please check its source code and implement error recovery when developing production applications.
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ESP_LOGI(SD_TAG, "Using SPI peripheral");
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// By default, SD card frequency is initialized to SDMMC_FREQ_DEFAULT (20MHz)
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// For setting a specific frequency, use host.max_freq_khz (range 400kHz - 20MHz for SDSPI)
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// Example: for fixed frequency of 10MHz, use host.max_freq_khz = 10000;
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sdmmc_host_t host = SDSPI_HOST_DEFAULT();
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spi_bus_config_t bus_cfg = {
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.mosi_io_num = PIN_NUM_MOSI,
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.miso_io_num = PIN_NUM_MISO,
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.sclk_io_num = PIN_NUM_SCLK,
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.quadwp_io_num = -1,
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.quadhd_io_num = -1,
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.max_transfer_sz = 4000,
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};
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ret = spi_bus_initialize(host.slot, &bus_cfg, SDSPI_DEFAULT_DMA);
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if (ret != ESP_OK) {
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ESP_LOGE(SD_TAG, "Failed to initialize SPI bus.");
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return;
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}
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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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sdspi_device_config_t slot_config = SDSPI_DEVICE_CONFIG_DEFAULT();
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slot_config.gpio_cs = PIN_NUM_CS;
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slot_config.host_id = host.slot;
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ESP_LOGI(SD_TAG, "Mounting filesystem");
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ret = esp_vfs_fat_sdspi_mount(mount_point, &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(SD_TAG, "Failed to mount filesystem. "
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"If you want the card to be formatted, set the CONFIG_EXAMPLE_FORMAT_IF_MOUNT_FAILED menuconfig option.");
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} else {
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ESP_LOGE(SD_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;
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}
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ESP_LOGI(SD_TAG, "Filesystem mounted");
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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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SDCard_Size = ((uint64_t) card->csd.capacity) * card->csd.sector_size / (1024 * 1024);
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}
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void Flash_Searching(void)
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{
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if(esp_flash_get_physical_size(NULL, &Flash_Size) == ESP_OK)
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{
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Flash_Size = Flash_Size / (uint32_t)(1024 * 1024);
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printf("Flash size: %ld MB\n", Flash_Size);
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}
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else{
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printf("Get flash size failed\n");
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}
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} |