lcd and sd card file listing works
This commit is contained in:
Timo Niemann
+207
@@ -0,0 +1,207 @@
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#include <string.h>
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#include <dirent.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <sys/unistd.h>
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#include <sys/stat.h>
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#include "sd/sd.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 "sdmmc_cmd.h"
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#include "driver/gpio.h"
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#include "driver/sdspi_host.h"
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#include "driver/spi_common.h"
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#define MAX_CHAR_SIZE 64
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#define MOUNT_POINT "/sdcard"
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#define SD_PIN_MOSI (GPIO_NUM_11)
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#define SD_PIN_MISO (GPIO_NUM_13)
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#define SD_PIN_CLK (GPIO_NUM_12)
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#define SD_PIN_CS (GPIO_NUM_10)
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static sdmmc_card_t* card = NULL;
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static const char *TAG = "sd";
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static char** _file_list = NULL;
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static size_t _current_file = 0;
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static size_t _file_count = 0;
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static esp_err_t get_top_level_files(void);
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void sd_init(void){
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if(card != NULL){
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ESP_LOGW(TAG, "SD card already initialized");
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return;
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}
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sdmmc_host_t host = SDSPI_HOST_DEFAULT();
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host.unaligned_multi_block_rw_max_chunk_size = 8;
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spi_bus_config_t bus_config = {
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.mosi_io_num = SD_PIN_MOSI,
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.miso_io_num = SD_PIN_MISO,
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.sclk_io_num = SD_PIN_CLK,
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.quadwp_io_num = GPIO_NUM_NC,
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.quadhd_io_num = GPIO_NUM_NC,
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.max_transfer_sz = 4000,
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};
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esp_err_t ret = spi_bus_initialize(host.slot, &bus_config, SDSPI_DEFAULT_DMA);
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if(ret != ESP_OK){
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ESP_LOGE(TAG, "Failed to initialize SD SPI bus (%s)", esp_err_to_name(ret));
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return;
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}
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sdspi_device_config_t slot_config = SDSPI_DEVICE_CONFIG_DEFAULT();
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slot_config.gpio_cs = SD_PIN_CS;
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slot_config.host_id = host.slot;
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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 = MAX_SIMULTANEOUS_OPEN_FILES,
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.allocation_unit_size = 16 * 1024
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};
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const char mount_point[] = MOUNT_POINT;
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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) ESP_LOGE(TAG, "Failed to mount filesystem.");
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else ESP_LOGE(TAG, "Failed to initialize the card (%s). ", esp_err_to_name(ret));
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spi_bus_free(host.slot);
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return;
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}
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ESP_LOGI(TAG, "SD card initialized");
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if(get_top_level_files() == ESP_OK) ESP_LOGI(TAG, "Found %d files in root directory", _file_count);
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else ESP_LOGW(TAG, "No files found in root directory");
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}
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void print_sd_card_info(void){
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if(card == NULL) return;
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sdmmc_card_print_info(stdout, card);
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}
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static inline void make_file_path(char* buffer, size_t buffer_size, const char* filename){
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snprintf(buffer, buffer_size, "%s/%s", MOUNT_POINT, filename);
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}
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FILE* sd_open_read(const char* filename){
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if(filename == NULL) return NULL;
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char full_path[strlen(MOUNT_POINT) + strlen(filename) + 2];
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make_file_path(full_path, sizeof(full_path), filename);
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return fopen(full_path, "r");
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}
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FILE* sd_open_write(const char* filename){
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if(filename == NULL) return NULL;
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char full_path[strlen(MOUNT_POINT) + strlen(filename) + 2];
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make_file_path(full_path, sizeof(full_path), filename);
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return fopen(full_path, "w");
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}
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void sd_close_file(FILE* file){
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if(file != NULL) fclose(file);
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}
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static esp_err_t get_top_level_files(void){
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char** file_list = NULL;
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size_t count = 0;
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size_t capacity = 0;
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DIR* dir = opendir(MOUNT_POINT);
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if(dir == NULL){
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ESP_LOGE(TAG, "Failed to open directory: %s", MOUNT_POINT);
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return ESP_FAIL;
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}
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struct dirent* entry;
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while((entry = readdir(dir)) != NULL){
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if(entry->d_type == DT_REG){
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ESP_LOGI(TAG, "Found file: %s", entry->d_name);
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size_t name_length = strlen(entry->d_name);
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if(name_length >= MAX_CHAR_SIZE){
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ESP_LOGW(TAG, "File name too long: %s", entry->d_name);
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continue;
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}
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if(count == capacity){
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size_t new_capacity = capacity == 0 ? 8 : capacity * 2;
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char** new_file_list = (char**)realloc(file_list, sizeof(char*) * new_capacity);
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if(new_file_list == NULL){
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ESP_LOGE(TAG, "Failed to allocate memory for file list");
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for(size_t j = 0; j < count; j++) free(file_list[j]);
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free(file_list);
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closedir(dir);
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return ESP_FAIL;
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}
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file_list = new_file_list;
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capacity = new_capacity;
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}
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file_list[count] = (char*)malloc(sizeof(char) * (name_length + 1));
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if(file_list[count] == NULL){
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ESP_LOGE(TAG, "Failed to allocate memory for file name");
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for(size_t j = 0; j < count; j++) free(file_list[j]);
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free(file_list);
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closedir(dir);
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return ESP_FAIL;
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}
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memcpy(file_list[count], entry->d_name, name_length + 1);
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count++;
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}
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}
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closedir(dir);
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if(count == 0){
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ESP_LOGW(TAG, "No files found in directory: %s", MOUNT_POINT);
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free(file_list);
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_file_list = NULL;
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_current_file = 0;
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return ESP_FAIL;
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}
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_file_list = file_list;
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_file_count = count;
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return ESP_OK;
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}
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size_t sd_get_file_count(void){
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return _file_count;
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}
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const char* sd_get_next_file(void){
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if(_current_file >= _file_count) _current_file = 0;
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return _file_list[_current_file++];
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}
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const char* sd_get_previous_file(void){
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if(_current_file == 0) _current_file = _file_count;
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return _file_list[--_current_file];
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}
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void sd_destroy(void){
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if(card != NULL){
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esp_vfs_fat_sdcard_unmount(MOUNT_POINT, card);
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card = NULL;
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ESP_LOGI(TAG, "SD card unmounted");
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}
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if(_file_list != NULL){
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for(int i = 0; i < _file_count; i++) free((void*)_file_list[i]);
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free((void*)_file_list);
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_file_list = NULL;
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}
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_file_count = 0;
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_current_file = 0;
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}
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