load image from file and storage

from storage doesn't work yet, because of memory issues

firmware/.clang-format

@@ -0,0 +1,2 @@
+---
+BasedOnStyle: Microsoft

firmware/components/storage/CMakeLists.txt

@@ -0,0 +1,7 @@
+idf_component_register(SRCS 
+                        "storage.c"
+                    INCLUDE_DIRS "include"
+                    PRIV_REQUIRES
+                        fatfs
+                        lwip
+                    )

firmware/components/storage/idf_component.yml

@@ -0,0 +1,3 @@
+dependencies:
+  lvgl/lvgl: 
+    version: ^9.0.0

firmware/components/storage/include/storage.h

@@ -0,0 +1,63 @@
+#pragma once
+
+#include <lvgl.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+    void fs_mount(void);
+    void fs_unmount(void);
+
+    /**
+     * Öffnet eine Datei.
+     * @param drv Zeiger auf den Treiber
+     * @param path Pfad zur Datei
+     * @param mode LV_FS_MODE_RD für Lesen, LV_FS_MODE_WR für Schreiben
+     * @return Zeiger auf ein Datei-Objekt im Erfolgsfall, sonst NULL
+     */
+    void *fs_open(lv_fs_drv_t *drv, const char *path, lv_fs_mode_t mode);
+
+    /**
+     * Schließt eine geöffnete Datei.
+     * @param drv Zeiger auf den Treiber
+     * @param file_p Zeiger auf das Datei-Objekt
+     * @return LV_FS_RES_OK im Erfolgsfall, sonst Fehlercode
+     */
+    lv_fs_res_t fs_close(lv_fs_drv_t *drv, void *file_p);
+
+    /**
+     * Liest Daten aus einer Datei.
+     * @param drv Zeiger auf den Treiber
+     * @param file_p Zeiger auf das Datei-Objekt
+     * @param buf Puffer, in den die Daten gelesen werden
+     * @param btr Anzahl der zu lesenden Bytes (Bytes to Read)
+     * @param br Zeiger, in den die Anzahl der tatsächlich gelesenen Bytes geschrieben wird
+     * @return LV_FS_RES_OK im Erfolgsfall, sonst Fehlercode
+     */
+    lv_fs_res_t fs_read(lv_fs_drv_t *drv, void *file_p, void *buf, uint32_t btr, uint32_t *br);
+
+    /**
+     * Setzt den Lese-/Schreibzeiger in der Datei.
+     * @param drv Zeiger auf den Treiber
+     * @param file_p Zeiger auf das Datei-Objekt
+     * @param pos Position, zu der gesprungen werden soll
+     * @param whence Startpunkt: LV_FS_SEEK_SET (Anfang), LV_FS_SEEK_CUR (aktuell), LV_FS_SEEK_END (Ende)
+     * @return LV_FS_RES_OK im Erfolgsfall, sonst Fehlercode
+     */
+    lv_fs_res_t fs_seek(lv_fs_drv_t *drv, void *file_p, uint32_t pos, lv_fs_whence_t whence);
+
+    /**
+     * Gibt die aktuelle Position des Lese-/Schreibzeigers zurück.
+     * @param drv Zeiger auf den Treiber
+     * @param file_p Zeiger auf das Datei-Objekt
+     * @param pos_p Zeiger, in den die aktuelle Position geschrieben wird
+     * @return LV_FS_RES_OK im Erfolgsfall, sonst Fehlercode
+     */
+    lv_fs_res_t fs_tell(lv_fs_drv_t *drv, void *file_p, uint32_t *pos_p);
+
+    /******* */
+    void setup_fatfs();
+#ifdef __cplusplus
+} // extern "C"
+#endif

firmware/components/storage/storage.c

@@ -0,0 +1,254 @@
+#include "storage.h"
+#include "esp_err.h"
+#include "esp_log.h"
+#include "esp_sntp.h"
+#include "esp_vfs_fat.h"
+#include "ff.h"
+#include <lvgl.h>
+#include <stdlib.h>
+
+static const char *TAG = "storage";
+
+static const char *base_path = "/storage";
+static wl_handle_t wl_handle = WL_INVALID_HANDLE;
+
+void fs_mount(void)
+{
+    const esp_vfs_fat_mount_config_t mount_config = {
+        .format_if_mount_failed = false,
+        .max_files = 4,
+        .allocation_unit_size = CONFIG_WL_SECTOR_SIZE,
+        .disk_status_check_enable = false,
+        .use_one_fat = false,
+    };
+
+    ESP_LOGI(TAG, "Mounting FAT filesystem in read/write mode");
+    esp_err_t err = esp_vfs_fat_spiflash_mount_rw_wl(base_path, "storage", &mount_config, &wl_handle);
+
+    if (err != ESP_OK)
+    {
+        ESP_LOGE(TAG, "Failed to mount FATFS (%s)", esp_err_to_name(err));
+    }
+}
+
+void fs_unmount(void)
+{
+    if (wl_handle != WL_INVALID_HANDLE)
+    {
+        ESP_LOGI(TAG, "Unmounting FAT filesystem");
+        esp_err_t err = esp_vfs_fat_spiflash_unmount_rw_wl(base_path, wl_handle);
+        if (err != ESP_OK)
+        {
+            ESP_LOGE(TAG, "Failed to unmount FATFS (%s)", esp_err_to_name(err));
+        }
+        else
+        {
+            ESP_LOGI(TAG, "FAT filesystem unmounted");
+            wl_handle = WL_INVALID_HANDLE;
+        }
+    }
+    else
+    {
+        ESP_LOGW(TAG, "FAT filesystem is not mounted");
+    }
+}
+
+/**
+ * Opens a file.
+ * @param drv Pointer to the driver
+ * @param path Path to the file
+ * @param mode LV_FS_MODE_RD for reading, LV_FS_MODE_WR for writing
+ * @return Pointer to a file object in case of success, otherwise NULL
+ */
+void *fs_open(lv_fs_drv_t *drv, const char *path, lv_fs_mode_t mode)
+{
+    LV_UNUSED(drv);
+    ESP_LOGI(TAG, "fs_open called for path: %s, mode: %d", path, mode);
+
+    BYTE fatfs_mode;
+    if (mode == LV_FS_MODE_WR)
+    {
+        fatfs_mode = FA_WRITE | FA_CREATE_ALWAYS;
+    }
+    else if (mode == LV_FS_MODE_RD)
+    {
+        fatfs_mode = FA_READ;
+    }
+    else
+    {
+        ESP_LOGE(TAG, "fs_open: Unknown mode: %d", mode);
+        return NULL;
+    }
+
+    FIL *file_p = (FIL *)malloc(sizeof(FIL));
+    if (file_p == NULL)
+    {
+        ESP_LOGE(TAG, "fs_open: Failed to allocate memory for file object");
+        return NULL;
+    }
+
+    FRESULT res = f_open(file_p, path, fatfs_mode);
+    if (res != FR_OK)
+    {
+        ESP_LOGE(TAG, "fs_open: f_open failed with error code: %d", res);
+        free(file_p);
+        return NULL;
+    }
+
+    ESP_LOGI(TAG, "fs_open: Successfully opened file: %s", path);
+    return file_p;
+}
+
+/**
+ * Closes an opened file.
+ * @param drv Pointer to the driver
+ * @param file_p Pointer to the file object
+ * @return LV_FS_RES_OK on success, otherwise error code
+ */
+lv_fs_res_t fs_close(lv_fs_drv_t *drv, void *file_p)
+{
+    LV_UNUSED(drv);
+    ESP_LOGI(TAG, "fs_close called.");
+
+    if (file_p == NULL)
+    {
+        ESP_LOGE(TAG, "fs_close: file pointer is NULL.");
+        return LV_FS_RES_INV_PARAM;
+    }
+
+    f_close((FIL *)file_p);
+    free(file_p);
+    return LV_FS_RES_OK;
+}
+
+/**
+ * Reads data from a file.
+ * @param drv Pointer to the driver
+ * @param file_p Pointer to the file object
+ * @param buf Buffer to read the data into
+ * @param btr Number of bytes to read (Bytes to Read)
+ * @param br Pointer to store the number of bytes actually read
+ * @return LV_FS_RES_OK on success, otherwise error code
+ */
+lv_fs_res_t fs_read(lv_fs_drv_t *drv, void *file_p, void *buf, uint32_t btr, uint32_t *br)
+{
+    LV_UNUSED(drv);
+    ESP_LOGI(TAG, "fs_read called, bytes to read: %" PRIu32, btr);
+
+    FRESULT res = f_read((FIL *)file_p, buf, btr, (UINT *)br);
+    if (res == FR_OK)
+    {
+        ESP_LOGI(TAG, "fs_read: Successfully read %" PRIu32 " bytes.", *br);
+        return LV_FS_RES_OK;
+    }
+    else
+    {
+        ESP_LOGE(TAG, "fs_read: f_read failed with error code: %d", res);
+        return LV_FS_RES_UNKNOWN;
+    }
+}
+
+/**
+ * Sets the read/write pointer in the file.
+ * @param drv Pointer to the driver
+ * @param file_p Pointer to the file object
+ * @param pos Position to seek to
+ * @param whence Starting point: LV_FS_SEEK_SET (beginning), LV_FS_SEEK_CUR (current), LV_FS_SEEK_END (end)
+ * @return LV_FS_RES_OK on success, otherwise error code
+ */
+lv_fs_res_t fs_seek(lv_fs_drv_t *drv, void *file_p, uint32_t pos, lv_fs_whence_t whence)
+{
+    LV_UNUSED(drv);
+    ESP_LOGI(TAG, "fs_seek: pos=%" PRIu32 ", whence=%d", pos, whence);
+
+    // Map LVGL whence to FatFS f_lseek (f_lseek always starts from the beginning)
+    switch (whence)
+    {
+    case LV_FS_SEEK_SET:
+        f_lseek((FIL *)file_p, pos);
+        break;
+    case LV_FS_SEEK_CUR:
+        f_lseek((FIL *)file_p, f_tell((FIL *)file_p) + pos);
+        break;
+    case LV_FS_SEEK_END:
+        {
+            FSIZE_t fsize = f_size((FIL *)file_p);
+            ESP_LOGI(TAG, "fs_seek to end, file size: %lu", (unsigned long)fsize);
+            f_lseek((FIL *)file_p, fsize + pos);
+        }
+        break;
+    default:
+        break;
+    }
+    return LV_FS_RES_OK;
+}
+
+/**
+ * Returns the current position of the read/write pointer.
+ * @param drv Pointer to the driver
+ * @param file_p Pointer to the file object
+ * @param pos_p Pointer to store the current position
+ * @return LV_FS_RES_OK on success, otherwise error code
+ */
+lv_fs_res_t fs_tell(lv_fs_drv_t *drv, void *file_p, uint32_t *pos_p)
+{
+    LV_UNUSED(drv);
+    ESP_LOGI(TAG, "fs_tell called.");
+
+    *pos_p = f_tell((FIL *)file_p);
+    ESP_LOGI(TAG, "fs_tell: Current position: %" PRIu32, *pos_p);
+    return LV_FS_RES_OK;
+}
+
+/**************** */
+void setup_fatfs()
+{
+    const esp_vfs_fat_mount_config_t mount_config = {
+        .format_if_mount_failed = false,
+        .max_files = 4,
+        .allocation_unit_size = CONFIG_WL_SECTOR_SIZE,
+        .disk_status_check_enable = false,
+        .use_one_fat = false,
+    };
+
+    ESP_LOGI(TAG, "Mounting FAT filesystem in read/write mode");
+    static wl_handle_t wl_handle = WL_INVALID_HANDLE;
+    esp_err_t err = esp_vfs_fat_spiflash_mount_rw_wl(base_path, "storage", &mount_config, &wl_handle);
+
+    if (err != ESP_OK)
+    {
+        ESP_LOGE(TAG, "Failed to mount FATFS (%s)", esp_err_to_name(err));
+        return;
+    }
+
+    FILE *f;
+    ESP_LOGI(TAG, "Reading file");
+
+    const char *host_filename1 = "/storage/response.png";
+
+    struct stat info;
+    struct tm timeinfo;
+    char buffer[32];
+
+    if (stat(host_filename1, &info) < 0)
+    {
+        ESP_LOGE(TAG, "Failed to read file stats");
+        return;
+    }
+    localtime_r(&info.st_mtime, &timeinfo);
+    strftime(buffer, sizeof(buffer), "%Y-%m-%d", &timeinfo);
+
+    ESP_LOGI(TAG, "The file '%s' was modified at date: %s", host_filename1, buffer);
+
+    f = fopen(host_filename1, "rb");
+    if (f == NULL)
+    {
+        ESP_LOGE(TAG, "Failed to open file for reading");
+        return;
+    }
+    fclose(f);
+
+    ESP_LOGI(TAG, "Unmounting FAT filesystem");
+    ESP_ERROR_CHECK(esp_vfs_fat_spiflash_unmount_rw_wl(base_path, wl_handle));
+    ESP_LOGI(TAG, "Done");
+}

firmware/dependencies.lock

@@ -37,6 +37,6 @@ direct_dependencies:
 - idf
 - lovyan03/LovyanGFX
 - lvgl/lvgl
-manifest_hash: bddd2c10e17729ab5f356657e175fbb9b182bfaa34e4d46a270974778ae75636
+manifest_hash: 180a2fcebb323954e96b7d1014d1ae4841a680c9b1f93853bd993bf23c9c9da1
 target: esp32s3
 version: 2.0.0

firmware/main/CMakeLists.txt

@@ -3,6 +3,7 @@ idf_component_register(SRCS
                         "main.cpp" 
                     PRIV_REQUIRES 
                         fatfs
+                        storage
                         esp_wifi
                         wpa_supplicant
                     INCLUDE_DIRS ".")

firmware/main/main.cpp

@@ -1,12 +1,12 @@
 #include <lgfx.h>
 #include <lvgl.h>
 
-#include "esp_vfs.h"
-#include "esp_vfs_fat.h"
 #include "esp_err.h"
 #include "esp_log.h"
 
+#include "ff.h"
 #include "image.h"
+#include "storage.h"
 
 #define screenWidth (480)
 #define screenHeight (320)
@@ -16,9 +16,9 @@ uint8_t lvBuffer1[lvBufferSize];
 uint8_t lvBuffer2[lvBufferSize];
 
 static const char *TAG = "main";
-const char *base_path = "/storage";
 
 LGFX tft;
+static FATFS fs;
 
 void setup_tft(void)
 {
@@ -52,71 +52,25 @@ void my_touch_read(lv_indev_t *indev_driver, lv_indev_data_t *data)
     }
 }
 
-void lv_handler()
+void fatfs_lvgl_init(void)
 {
-    static uint64_t previousUpdate = 0;
-    static uint64_t interval = 0;
+    // 1. Das Dateisystem "mounten" (einmalig für FatFS)
+    f_mount(&fs, "S:", 1); // "S:" ist der Laufwerksbuchstabe
 
-    uint64_t eus = esp_timer_get_time();
-    if (eus - previousUpdate > interval)
-    {
-        previousUpdate = eus;
-        interval = lv_timer_handler(); // Update the UI
-        lv_tick_inc(interval);
-        vTaskDelay(pdMS_TO_TICKS(interval - 1));
-    }
-}
+    // 2. Eine Treiber-Variable deklarieren
+    static lv_fs_drv_t drv;
+    lv_fs_drv_init(&drv); // Treiberstruktur initialisieren
 
-void setup_fatfs()
-{
-    const esp_vfs_fat_mount_config_t mount_config = {
-        .format_if_mount_failed = false,
-        .max_files = 4,
-        .allocation_unit_size = CONFIG_WL_SECTOR_SIZE,
-        .disk_status_check_enable = false,
-        .use_one_fat = false,
-    };
+    // 3. Unsere Bridge-Funktionen zuweisen
+    drv.letter = 'S'; // WICHTIG: Muss mit dem Buchstaben in f_mount übereinstimmen
+    drv.open_cb = fs_open;
+    drv.close_cb = fs_close;
+    drv.read_cb = fs_read;
+    drv.seek_cb = fs_seek;
+    drv.tell_cb = fs_tell;
 
-    ESP_LOGI(TAG, "Mounting FAT filesystem in read/write mode");
-    static wl_handle_t wl_handle = WL_INVALID_HANDLE;
-    esp_err_t err = esp_vfs_fat_spiflash_mount_rw_wl(base_path, "storage", &mount_config, &wl_handle);
-
-    if (err != ESP_OK)
-    {
-        ESP_LOGE(TAG, "Failed to mount FATFS (%s)", esp_err_to_name(err));
-        return;
-    }
-
-    FILE *f;
-    ESP_LOGI(TAG, "Reading file");
-
-    const char *host_filename1 = "/storage/response.png";
-
-    struct stat info;
-    struct tm timeinfo;
-    char buffer[32];
-
-    if (stat(host_filename1, &info) < 0)
-    {
-        ESP_LOGE(TAG, "Failed to read file stats");
-        return;
-    }
-    localtime_r(&info.st_mtime, &timeinfo);
-    strftime(buffer, sizeof(buffer), "%Y-%m-%d", &timeinfo);
-
-    ESP_LOGI(TAG, "The file '%s' was modified at date: %s", host_filename1, buffer);
-
-    f = fopen(host_filename1, "rb");
-    if (f == NULL)
-    {
-        ESP_LOGE(TAG, "Failed to open file for reading");
-        return;
-    }
-    fclose(f);
-
-    ESP_LOGI(TAG, "Unmounting FAT filesystem");
-    ESP_ERROR_CHECK(esp_vfs_fat_spiflash_unmount_rw_wl(base_path, wl_handle));
-    ESP_LOGI(TAG, "Done");
+    // 4. Den Treiber bei LVGL registrieren
+    lv_fs_drv_register(&drv);
 }
 
 void esp_lv_log_print(lv_log_level_t level, const char *buf)
@@ -145,14 +99,15 @@ void esp_lv_log_print(lv_log_level_t level, const char *buf)
 
 void setup()
 {
-    setup_fatfs();
-
     setup_tft();
 
     lv_init();
 
     lv_log_register_print_cb(esp_lv_log_print);
 
+    fs_mount();
+    fatfs_lvgl_init();
+
     static auto *display = lv_display_create(screenWidth, screenHeight);
     lv_display_set_color_format(display, LV_COLOR_FORMAT_RGB565);
     lv_display_set_flush_cb(display, flush);
@@ -163,15 +118,23 @@ void setup()
     lv_indev_set_read_cb(lvInput, my_touch_read);
 
     ESP_LOGI(TAG, "create image");
+#ifndef LOCAL
     static auto *image = lv_image_create(lv_scr_act());
     lv_image_set_src(image, &image_data);
     lv_obj_align(image, LV_ALIGN_TOP_LEFT, 0, 0);
+#else
+    lv_obj_t *img = lv_image_create(lv_screen_active());
+    lv_image_set_src(img, "S:/response.png"); // Pfad beginnt mit "S:"
+    lv_obj_center(img);
+#endif
     ESP_LOGI(TAG, "image created");
 }
 
 void loop()
 {
-    lv_handler();
+    lv_tick_inc(10);
+    lv_timer_handler();
+    vTaskDelay(pdMS_TO_TICKS(10));
 }
 
 void lvgl_task(void *pvParameter)
@@ -181,9 +144,10 @@ void lvgl_task(void *pvParameter)
     {
         loop();
     }
+    fs_unmount();
 }
 
 extern "C" void app_main(void)
 {
-    xTaskCreatePinnedToCore(lvgl_task, "lvgl_task", 4096, NULL, 5, NULL, 1);
+    xTaskCreatePinnedToCore(lvgl_task, "lvgl_task", 8192, NULL, 5, NULL, 1);
 }

firmware/sdkconfig.defaults

@@ -17,6 +17,7 @@ CONFIG_LV_USE_MEM_MONITOR=y
 CONFIG_LV_MEM_MONITOR_ALIGN_BOTTOM_LEFT=y
 CONFIG_LV_USE_ST7796=y
 CONFIG_LV_BUILD_EXAMPLES=n
+CONFIG_LV_BUILD_DEMOS=n
 
 # partitions
 CONFIG_PARTITION_TABLE_CUSTOM=y