+ rearranged files

+ improved ui log
+ added image browser
- image loading fails at the moment
- arrangement of ui in image browser not checked

main/include/lcd/lcd.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include "esp_err.h"
+#include "lvgl.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define LCD_H_RES   (800)
+#define LCD_V_RES   (480)
+
+esp_err_t lcd_init(void);
+lv_display_t *lcd_get_display(void);
+
+#ifdef __cplusplus
+}
+#endif

main/include/lcd/ui.h

@@ -0,0 +1,12 @@
+#pragma once 
+
+typedef enum {
+    UI_VIEW_LOG,
+    UI_VIEW_IMAGE_BROWSER,
+} ui_view_t;
+
+void ui_log_append(const char *text);
+void create_log_ui(void);
+void create_image_browser_ui(void);
+
+void ui_switch_view_to(ui_view_t view);

main/include/sd/sd.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <stdio.h>
+
+#define MAX_SIMULTANEOUS_OPEN_FILES 2
+
+void sd_init(void);
+void sd_destroy(void);
+
+void print_sd_card_info(void);
+
+FILE* sd_open_read(const char* filename);
+FILE* sd_open_write(const char* filename);
+void sd_close_file(FILE* file);
+
+size_t sd_get_file_count(void);
+const char* sd_get_next_file(void);
+const char* sd_get_previous_file(void);