Initial sanitized SmartSpeaker snapshot

2026-07-13 21:13:19 -07:00
commit ac26dcc238
66 changed files with 11438 additions and 0 deletions
@@ -0,0 +1,684 @@
+#include "bsp_board.h"
+
+#include <stdbool.h>
+#include "esp_err.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/semphr.h"
+#include "string.h"
+#include "driver/gpio.h"
+#include "esp_err.h"
+#include "esp_log.h"
+#include "esp_rom_sys.h"
+#include "esp_check.h"
+#include "esp_vfs_fat.h"
+#include "sdmmc_cmd.h"
+
+
+#include <sys/unistd.h>
+#include <sys/stat.h>
+#include "dirent.h"
+#include "driver/sdmmc_host.h"
+#include <errno.h>
+
+#if ((SOC_SDMMC_HOST_SUPPORTED) && (FUNC_SDMMC_EN))
+#include "driver/sdmmc_host.h"
+#endif /* ((SOC_SDMMC_HOST_SUPPORTED) && (FUNC_SDMMC_EN)) */
+
+
+#define ADC_I2S_CHANNEL 4
+
+static sdmmc_card_t *card;
+static const char *TAG = "board";
+static int s_play_sample_rate = 16000;
+static int s_play_channel_format = 1;
+static int s_bits_per_chan = 16;
+
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 0, 0)
+static i2s_chan_handle_t            tx_handle = NULL;        // I2S tx channel handler
+static i2s_chan_handle_t            rx_handle = NULL;        // I2S rx channel handler
+#endif
+static audio_codec_data_if_t *record_data_if  = NULL;
+static audio_codec_ctrl_if_t *record_ctrl_if  = NULL;
+static audio_codec_if_t *record_codec_if      = NULL;
+static esp_codec_dev_handle_t record_dev      = NULL;
+
+static audio_codec_data_if_t *play_data_if    = NULL;
+static audio_codec_ctrl_if_t *play_ctrl_if    = NULL;
+static audio_codec_gpio_if_t *play_gpio_if    = NULL;
+static audio_codec_if_t *play_codec_if        = NULL;
+static esp_codec_dev_handle_t play_dev        = NULL;
+static i2c_master_bus_handle_t i2c_bus_handle = NULL;
+static uint32_t SDCard_Size  = 0;
+
+
+esp_codec_dev_handle_t esp_ret_play_dev(void)
+{
+    return play_dev;
+}
+
+i2c_master_bus_handle_t esp_ret_i2c_handle(void)
+{
+    return i2c_bus_handle;
+}
+
+uint32_t Get_SD_Size(void)
+{
+    return SDCard_Size;
+}
+
+static esp_err_t i2c_master_init(void)
+{
+    const i2c_master_bus_config_t bus_config = {
+        .i2c_port = I2C_NUM,
+        .sda_io_num = GPIO_I2C_SDA,
+        .scl_io_num = GPIO_I2C_SCL,
+        .clk_source = I2C_CLK_SRC_DEFAULT,
+    };
+
+    esp_err_t ret = i2c_new_master_bus(&bus_config, &i2c_bus_handle);
+    if (ret != ESP_OK) {
+        ESP_LOGE(TAG, "Failed to initialize I2C bus: %s", esp_err_to_name(ret));
+        return ret;
+    }
+
+    ESP_LOGI(TAG, "I2C bus initialized successfully");
+    return ESP_OK;  // 返回 ESP_OK 表示成功
+}
+
+
+esp_err_t bsp_codec_adc_init(int sample_rate)
+{
+    esp_err_t ret_val = ESP_OK;
+
+    // Do initialize of related interface: data_if, ctrl_if and gpio_if
+    audio_codec_i2s_cfg_t i2s_cfg = {
+        .port = I2S_NUM_1,
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 0, 0)
+        .rx_handle = rx_handle,
+        .tx_handle = NULL,
+#endif
+    };
+    record_data_if = audio_codec_new_i2s_data(&i2s_cfg);
+
+    audio_codec_i2c_cfg_t i2c_cfg = {.addr = ES7210_CODEC_DEFAULT_ADDR,.bus_handle = i2c_bus_handle};
+    record_ctrl_if = audio_codec_new_i2c_ctrl(&i2c_cfg);
+    // New input codec interface
+    es7210_codec_cfg_t es7210_cfg = {
+        .ctrl_if = record_ctrl_if,
+        .mic_selected = ES7210_SEL_MIC1 | ES7210_SEL_MIC2 | ES7210_SEL_MIC3 | ES7210_SEL_MIC4,
+    };  
+    record_codec_if = es7210_codec_new(&es7210_cfg);
+    // New input codec device
+    esp_codec_dev_cfg_t dev_cfg = {
+        .codec_if = record_codec_if,
+        .data_if = record_data_if,
+        .dev_type = ESP_CODEC_DEV_TYPE_IN,
+    };
+    record_dev = esp_codec_dev_new(&dev_cfg);
+
+    esp_codec_dev_sample_info_t fs = {
+        .sample_rate = 16000,
+        .channel = 2,
+        .bits_per_sample = 32,
+    };
+    esp_codec_dev_open(record_dev, &fs);
+    // esp_codec_dev_set_in_gain(record_dev, RECORD_VOLUME);
+    esp_codec_dev_set_in_channel_gain(record_dev, ESP_CODEC_DEV_MAKE_CHANNEL_MASK(0), RECORD_VOLUME);
+    esp_codec_dev_set_in_channel_gain(record_dev, ESP_CODEC_DEV_MAKE_CHANNEL_MASK(1), RECORD_VOLUME);
+    esp_codec_dev_set_in_channel_gain(record_dev, ESP_CODEC_DEV_MAKE_CHANNEL_MASK(2), RECORD_VOLUME);
+    esp_codec_dev_set_in_channel_gain(record_dev, ESP_CODEC_DEV_MAKE_CHANNEL_MASK(3), RECORD_VOLUME);
+
+    return ret_val;
+}
+
+esp_err_t bsp_codec_dac_init(int sample_rate, int channel_format, int bits_per_chan)
+{
+    esp_err_t ret_val = ESP_OK;
+
+    // Do initialize of related interface: data_if, ctrl_if and gpio_if
+    audio_codec_i2s_cfg_t i2s_cfg = {
+        .port = I2S_NUM_1,
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 0, 0)
+        .rx_handle = NULL,
+        .tx_handle = tx_handle,
+#endif
+    };
+    play_data_if = audio_codec_new_i2s_data(&i2s_cfg);
+
+    audio_codec_i2c_cfg_t i2c_cfg = {.addr = ES8311_CODEC_DEFAULT_ADDR,.bus_handle = i2c_bus_handle};
+    play_ctrl_if = audio_codec_new_i2c_ctrl(&i2c_cfg);
+    play_gpio_if = audio_codec_new_gpio();
+    // New output codec interface
+    es8311_codec_cfg_t es8311_cfg = {
+        .codec_mode = ESP_CODEC_DEV_WORK_MODE_DAC,
+        .ctrl_if = play_ctrl_if,
+        .gpio_if = play_gpio_if,
+        .pa_pin = GPIO_PWR_CTRL,
+        .use_mclk = false,
+    };
+    play_codec_if = es8311_codec_new(&es8311_cfg);
+    // New output codec device
+    esp_codec_dev_cfg_t dev_cfg = {
+        .codec_if = play_codec_if,
+        .data_if = play_data_if,
+        .dev_type = ESP_CODEC_DEV_TYPE_OUT,
+    };
+    play_dev = esp_codec_dev_new(&dev_cfg);
+
+    esp_codec_dev_sample_info_t fs = {
+        .bits_per_sample = bits_per_chan,
+        .sample_rate = sample_rate,
+        .channel = channel_format,
+    };
+    esp_codec_dev_set_out_vol(play_dev, PLAYER_VOLUME);
+    esp_codec_dev_open(play_dev, &fs);
+
+    return ret_val;
+}
+
+static esp_err_t bsp_codec_adc_deinit()
+{
+    esp_err_t ret_val = ESP_OK;
+
+    if (record_dev) {
+        esp_codec_dev_close(record_dev);
+        esp_codec_dev_delete(record_dev);
+        record_dev = NULL;
+    }
+
+    // Delete codec interface
+    if (record_codec_if) {
+        audio_codec_delete_codec_if(record_codec_if);
+        record_codec_if = NULL;
+    }
+    
+    // Delete codec control interface
+    if (record_ctrl_if) {
+        audio_codec_delete_ctrl_if(record_ctrl_if);
+        record_ctrl_if = NULL;
+    }
+    
+    // Delete codec data interface
+    if (record_data_if) {
+        audio_codec_delete_data_if(record_data_if);
+        record_data_if = NULL;
+    }
+
+    return ret_val;
+}
+
+static esp_err_t bsp_codec_dac_deinit()
+{
+    esp_err_t ret_val = ESP_OK;
+
+    if (play_dev) {
+        esp_codec_dev_close(play_dev);
+        esp_codec_dev_delete(play_dev);
+        play_dev = NULL;
+    }
+
+    // Delete codec interface
+    if (play_codec_if) {
+        audio_codec_delete_codec_if(play_codec_if);
+        play_codec_if = NULL;
+    }
+    
+    // Delete codec control interface
+    if (play_ctrl_if) {
+        audio_codec_delete_ctrl_if(play_ctrl_if);
+        play_ctrl_if = NULL;
+    }
+    
+    if (play_gpio_if) {
+        audio_codec_delete_gpio_if(play_gpio_if);
+        play_gpio_if = NULL;
+    }
+    
+    // Delete codec data interface
+    if (play_data_if) {
+        audio_codec_delete_data_if(play_data_if);
+        play_data_if = NULL;
+    }
+
+    return ret_val;
+}
+
+esp_err_t esp_audio_set_play_vol(int volume)
+{
+    if (!play_dev) {
+        ESP_LOGE(TAG, "DAC codec init fail");
+        return ESP_FAIL;
+    }
+    esp_codec_dev_set_out_vol(play_dev, volume);
+    return ESP_OK;
+}
+
+esp_err_t esp_audio_get_play_vol(int *volume)
+{
+    if (!play_dev) {
+        ESP_LOGE(TAG, "DAC codec init fail");
+        return ESP_FAIL;
+    }
+    esp_codec_dev_get_out_vol(play_dev, volume);
+    return ESP_OK;
+}
+
+// static esp_err_t bsp_i2s_init(i2s_port_t i2s_num, uint32_t sample_rate, i2s_channel_fmt_t channel_format, i2s_bits_per_chan_t bits_per_chan)
+static esp_err_t bsp_i2s_init(int i2s_num, uint32_t sample_rate, int channel_format, int bits_per_chan)
+{
+    esp_err_t ret_val = ESP_OK;
+
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 0, 0)
+    i2s_slot_mode_t channel_fmt = I2S_SLOT_MODE_STEREO;
+    if (channel_format == 1) {
+        channel_fmt = I2S_SLOT_MODE_MONO;
+    } else if (channel_format == 2) {
+        channel_fmt = I2S_SLOT_MODE_STEREO;
+    } else {
+        ESP_LOGE(TAG, "Unable to configure channel_format %d", channel_format);
+        channel_format = 1;
+        channel_fmt = I2S_SLOT_MODE_MONO;
+    }
+
+    if (bits_per_chan != 16 && bits_per_chan != 32) {
+        ESP_LOGE(TAG, "Unable to configure bits_per_chan %d", bits_per_chan);
+        bits_per_chan = 32;
+    }
+
+    i2s_chan_config_t chan_cfg = I2S_CHANNEL_DEFAULT_CONFIG(i2s_num, I2S_ROLE_MASTER);
+    ret_val |= i2s_new_channel(&chan_cfg, &tx_handle, &rx_handle);
+    i2s_std_config_t std_cfg = I2S_CONFIG_DEFAULT(sample_rate, channel_fmt, bits_per_chan);
+    ret_val |= i2s_channel_init_std_mode(tx_handle, &std_cfg);
+    ret_val |= i2s_channel_init_std_mode(rx_handle, &std_cfg);
+    ret_val |= i2s_channel_enable(tx_handle);
+    ret_val |= i2s_channel_enable(rx_handle);
+#else
+    i2s_channel_fmt_t channel_fmt = I2S_CHANNEL_FMT_RIGHT_LEFT;
+    if (channel_format == 1) {
+        channel_fmt = I2S_CHANNEL_FMT_ONLY_LEFT;
+    } else if (channel_format == 2) {
+        channel_fmt = I2S_CHANNEL_FMT_RIGHT_LEFT;
+    } else {
+        ESP_LOGE(TAG, "Unable to configure channel_format %d", channel_format);
+        channel_format = 1;
+        channel_fmt = I2S_CHANNEL_FMT_ONLY_LEFT;
+    }
+
+    if (bits_per_chan != 16 && bits_per_chan != 32) {
+        ESP_LOGE(TAG, "Unable to configure bits_per_chan %d", bits_per_chan);
+        bits_per_chan = 16;
+    }
+
+    i2s_config_t i2s_config = I2S_CONFIG_DEFAULT(sample_rate, channel_fmt, bits_per_chan);
+
+    i2s_pin_config_t pin_config = {
+        .bck_io_num = GPIO_I2S_SCLK,
+        .ws_io_num = GPIO_I2S_LRCK,
+        .data_out_num = GPIO_I2S_DOUT,
+        .data_in_num = GPIO_I2S_SDIN,
+        .mck_io_num = GPIO_I2S_MCLK,
+    };
+
+    ret_val |= i2s_driver_install(i2s_num, &i2s_config, 0, NULL);
+    ret_val |= i2s_set_pin(i2s_num, &pin_config);
+#endif
+
+    return ret_val;
+}
+
+static esp_err_t bsp_i2s_deinit(int i2s_num)
+{
+    esp_err_t ret_val = ESP_OK;
+
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 0, 0)
+    if (i2s_num == I2S_NUM_1 && rx_handle) {
+        ret_val |= i2s_channel_disable(rx_handle);
+        ret_val |= i2s_del_channel(rx_handle);
+        rx_handle = NULL;
+    } else if (i2s_num == I2S_NUM_0  && tx_handle) {
+        ret_val |= i2s_channel_disable(tx_handle);
+        ret_val |= i2s_del_channel(tx_handle);
+        tx_handle = NULL;
+    }
+#else
+    ret_val |= i2s_stop(i2s_num);
+    ret_val |= i2s_driver_uninstall(i2s_num);
+#endif
+
+    return ret_val;
+}
+
+static esp_err_t bsp_codec_init(int adc_sample_rate, int dac_sample_rate, int dac_channel_format, int dac_bits_per_chan)
+{
+    esp_err_t ret_val = ESP_OK;
+
+    ret_val |= bsp_codec_adc_init(adc_sample_rate);
+    ret_val |= bsp_codec_dac_init(dac_sample_rate, dac_channel_format, dac_bits_per_chan);
+
+    return ret_val;
+}
+
+static esp_err_t bsp_codec_deinit()
+{
+    esp_err_t ret_val = ESP_OK;
+
+    ret_val |= bsp_codec_adc_deinit();
+    ret_val |= bsp_codec_dac_deinit();
+    return ret_val;
+}
+
+esp_err_t esp_audio_play(const int16_t* data, int length, uint32_t ticks_to_wait)
+{
+    size_t bytes_write = 0;
+    esp_err_t ret = ESP_OK;
+    if (!play_dev) {
+        return ESP_FAIL;
+    }
+
+    int out_length= length;
+    int audio_time = 1;
+    audio_time *= (16000 / s_play_sample_rate);
+    audio_time *= (2 / s_play_channel_format);
+
+    int *data_out = NULL;
+    if (s_bits_per_chan != 32) {
+        out_length = length * 2;
+        data_out = malloc(out_length);
+        for (int i = 0; i < length / sizeof(int16_t); i++) {
+            int ret = data[i];
+            data_out[i] = ret << 16;
+        }
+    }
+
+    int *data_out_1 = NULL;
+    if (s_play_channel_format != 2 || s_play_sample_rate != 16000) {
+        out_length *= audio_time;
+        data_out_1 = malloc(out_length);
+        int *tmp_data = NULL;
+        if (data_out != NULL) {
+            tmp_data = data_out;
+        } else {
+            tmp_data = (int *)data;
+        }
+
+        for (int i = 0; i < out_length / (audio_time * sizeof(int)); i++) {
+            for (int j = 0; j < audio_time; j++) {
+                data_out_1[audio_time * i + j] = tmp_data[i];
+            }
+        }
+        if (data_out != NULL) {
+            free(data_out);
+            data_out = NULL;
+        }
+    }
+
+    if (data_out != NULL) {
+        ret = esp_codec_dev_write(play_dev, (void *)data_out, out_length);
+        free(data_out);
+    } else if (data_out_1 != NULL) {
+        ret = esp_codec_dev_write(play_dev, (void *)data_out_1, out_length);
+        free(data_out_1);
+    } else {
+        ret = esp_codec_dev_write(play_dev, (void *)data, length);
+    }
+
+    return ret;
+}
+
+esp_err_t esp_get_feed_data(bool is_get_raw_channel, int16_t *buffer, int buffer_len)
+{
+    esp_err_t ret = ESP_OK;
+    size_t bytes_read;
+    int audio_chunksize = buffer_len / (sizeof(int16_t) * ADC_I2S_CHANNEL);
+
+    ret = esp_codec_dev_read(record_dev, (void *)buffer, buffer_len);
+    if (!is_get_raw_channel) {
+        for (int i = 0; i < audio_chunksize; i++) {
+            int16_t ref = buffer[4 * i + 0];
+            buffer[3 * i + 0] = buffer[4 * i + 1];
+            buffer[3 * i + 1] = buffer[4 * i + 3];
+            buffer[3 * i + 2] = ref;
+        }
+    }
+
+    return ret;
+}
+
+int esp_get_feed_channel(void)
+{
+    return ADC_I2S_CHANNEL;
+}
+
+char* esp_get_input_format(void)
+{
+    return "RMNM";
+}
+
+
+
+
+
+esp_err_t esp_board_init(uint32_t sample_rate, int channel_format, int bits_per_chan)
+{
+    /*!< Initialize I2C bus, used for audio codec*/
+
+    i2c_master_init();
+    s_play_sample_rate = sample_rate;
+
+    if (channel_format != 2 && channel_format != 1) {
+        ESP_LOGE(TAG, "Unable to configure channel_format");
+        channel_format = 2;
+    }
+    s_play_channel_format = channel_format;
+
+    if (bits_per_chan != 32 && bits_per_chan != 16) {
+        ESP_LOGE(TAG, "Unable to configure bits_per_chan");
+        bits_per_chan = 32;
+    }
+    s_bits_per_chan = bits_per_chan;
+
+    bsp_i2s_init(I2S_NUM_1, 16000, 2, 32);
+    // Because record and play use the same i2s.
+    bsp_codec_init(16000, 16000, 2, 32);
+
+    /* Initialize PA */
+     /*gpio_config_t  io_conf;
+     memset(&io_conf, 0, sizeof(io_conf));
+     io_conf.intr_type = GPIO_INTR_DISABLE;
+     io_conf.mode = GPIO_MODE_OUTPUT;
+     io_conf.pin_bit_mask = ((1ULL << GPIO_PWR_CTRL));
+     io_conf.pull_down_en = 0;
+     io_conf.pull_up_en = 0;
+     gpio_config(&io_conf);
+     gpio_set_level(GPIO_PWR_CTRL, 1);*/
+
+    return ESP_OK;
+}
+
+esp_err_t esp_sdcard_init(char *mount_point, size_t max_files)
+{
+    if (NULL != card) {
+        return ESP_ERR_INVALID_STATE;
+    }
+
+    /* Check if SD crad is supported */
+    if (!FUNC_SDMMC_EN && !FUNC_SDSPI_EN) {
+        ESP_LOGE(TAG, "SDMMC and SDSPI not supported on this board!");
+        return ESP_ERR_NOT_SUPPORTED;
+    }
+
+    esp_err_t ret_val = ESP_OK;
+
+    /**
+     * @brief 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 = false,
+        .max_files = max_files,
+        .allocation_unit_size = 16 * 1024
+    };
+
+    /**
+     * @brief Use settings defined above to initialize SD card and mount FAT filesystem.
+     *   Note: esp_vfs_fat_sdmmc/sdspi_mount is all-in-one convenience functions.
+     *   Please check its source code and implement error recovery when developing
+     *   production applications.
+     *
+     */
+    sdmmc_host_t host =
+#if FUNC_SDMMC_EN
+        SDMMC_HOST_DEFAULT();
+#else
+        SDSPI_HOST_DEFAULT();
+    spi_bus_config_t bus_cfg = {
+        .mosi_io_num = GPIO_SDSPI_MOSI,
+        .miso_io_num = GPIO_SDSPI_MISO,
+        .sclk_io_num = GPIO_SDSPI_SCLK,
+        .quadwp_io_num = GPIO_NUM_NC,
+        .quadhd_io_num = GPIO_NUM_NC,
+        .max_transfer_sz = 4000,
+    };
+    ret_val = spi_bus_initialize(host.slot, &bus_cfg, SPI_DMA_CH_AUTO);
+    if (ret_val != ESP_OK) {
+        ESP_LOGE(TAG, "Failed to initialize bus.");
+        return ret_val;
+    }
+#endif
+
+    /**
+     * @brief 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.
+     *
+     */
+#if FUNC_SDMMC_EN
+    sdmmc_slot_config_t slot_config = SDMMC_SLOT_CONFIG_DEFAULT();
+#else
+    sdspi_device_config_t slot_config = SDSPI_DEVICE_CONFIG_DEFAULT();
+#endif
+
+#if FUNC_SDMMC_EN
+    /* Config SD data width. 0, 4 or 8. Currently for SD card, 8 bit is not supported. */
+    slot_config.width = SDMMC_BUS_WIDTH;
+
+    /**
+     * @brief On chips where the GPIOs used for SD card can be configured, set them in
+     *   the slot_config structure.
+     *
+     */
+#if SOC_SDMMC_USE_GPIO_MATRIX
+    slot_config.clk = GPIO_SDMMC_CLK;
+    slot_config.cmd = GPIO_SDMMC_CMD;
+    slot_config.d0 = GPIO_SDMMC_D0;
+    slot_config.d1 = GPIO_SDMMC_D1;
+    slot_config.d2 = GPIO_SDMMC_D2;
+    slot_config.d3 = GPIO_SDMMC_D3;
+#endif
+    slot_config.cd = GPIO_SDMMC_DET;
+    slot_config.flags |= SDMMC_SLOT_FLAG_INTERNAL_PULLUP;
+#else
+    slot_config.gpio_cs = GPIO_SDSPI_CS;
+    slot_config.host_id = host.slot;
+#endif
+    /**
+     * @brief Enable internal pullups on enabled pins. The internal pullups
+     *   are insufficient however, please make sure 10k external pullups are
+     *   connected on the bus. This is for debug / example purpose only.
+     */
+
+    /* get FAT filesystem on SD card registered in VFS. */
+    ret_val =
+#if FUNC_SDMMC_EN
+        esp_vfs_fat_sdmmc_mount(mount_point, &host, &slot_config, &mount_config, &card);
+#else
+        esp_vfs_fat_sdspi_mount(mount_point, &host, &slot_config, &mount_config, &card);
+#endif
+
+    /* Check for SDMMC mount result. */
+    if (ret_val != ESP_OK) {
+        if (ret_val == ESP_FAIL) {
+            ESP_LOGE(TAG, "Failed to mount filesystem. "
+                     "If you want the card to be formatted, set the EXAMPLE_FORMAT_IF_MOUNT_FAILED menuconfig option.");
+        } 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(ret_val));
+        }
+        return ret_val;
+    }
+
+    /* Card has been initialized, print its properties. */
+    sdmmc_card_print_info(stdout, card);
+    SDCard_Size = ((uint64_t) card->csd.capacity) * card->csd.sector_size / (1024 * 1024);
+    return ret_val;
+}
+
+esp_err_t esp_sdcard_deinit(char *mount_point)
+{
+    if (NULL == mount_point) {
+        return ESP_ERR_INVALID_STATE;
+    }
+
+    /* Unmount an SD card from the FAT filesystem and release resources acquired */
+    esp_err_t ret_val = esp_vfs_fat_sdcard_unmount(mount_point, card);
+
+    /* Make SD/MMC card information structure pointer NULL */
+    card = NULL;
+
+    return ret_val;
+}
+
+#define MOUNT_POINT "/sdcard"
+
+static const char *SD_TAG = "SD";
+
+
+
+uint16_t Folder_retrieval(const char* directory, const char* fileExtension, char File_Name[][MAX_FILE_NAME_SIZE], uint16_t maxFiles)    
+{
+    DIR *dir = opendir(directory);  
+    if (dir == NULL) {
+        ESP_LOGE(SD_TAG, "Path: <%s> does not exist", directory); 
+        return 0;  
+    }
+
+    uint16_t fileCount = 0;  
+    struct dirent *entry;   
+
+    while ((entry = readdir(dir)) != NULL && fileCount < maxFiles) {
+
+        if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0) {
+            continue;
+        }
+
+        const char *dot = strrchr(entry->d_name, '.');  
+        if (dot != NULL && dot != entry->d_name) { 
+
+            if (strcasecmp(dot, fileExtension) == 0) {  
+                strncpy(File_Name[fileCount], entry->d_name, MAX_FILE_NAME_SIZE - 1);
+                File_Name[fileCount][MAX_FILE_NAME_SIZE - 1] = '\0';  
+
+                char filePath[MAX_PATH_SIZE];
+                snprintf(filePath, MAX_PATH_SIZE, "%s/%s", directory, entry->d_name);
+
+                printf("File found: %s\r\n", filePath); 
+                fileCount++;  
+            }
+        }
+        else{
+           
+            // printf("No extension found for file: %s\r\n", entry->d_name);
+        }
+    }
+
+    closedir(dir);  
+
+    if (fileCount > 0) {
+        ESP_LOGI(SD_TAG, "Retrieved %d files with extension '%s'", fileCount, fileExtension);  
+    } else {
+        ESP_LOGW(SD_TAG, "No files with extension '%s' found in directory: %s", fileExtension, directory); 
+    }
+
+    return fileCount; 
+}