chore(cmsis-pack): prepare for release v8.4.0

fixes #5143

.github/workflows/ccpp.yml

@@ -36,6 +36,11 @@ jobs:
     - uses: ammaraskar/gcc-problem-matcher@master
     - name: Install prerequisites
       run: scripts/install-prerequisites.sh
+    - name: Fix kernel mmap rnd bits
+      # Asan in llvm 14 provided in ubuntu 22.04 is incompatible with
+      # high-entropy ASLR in much newer kernels that GitHub runners are
+      # using leading to random crashes: https://reviews.llvm.org/D148280
+      run: sudo sysctl vm.mmap_rnd_bits=28
     - name: Run tests
       run: python tests/main.py --report test
     - name: Upload coverage to Codecov
@@ -93,4 +98,12 @@ jobs:
             echo 'export PATH="/usr/lib/ccache:$PATH"' | tee -a ~/.bashrc
 
           run: |
+            if [[ "${{ matrix.distro }}" == "ubuntu22.04" ]]; then
+              # ASan in llvm 14 provided in ubuntu-22.04 is incompatible with
+              # high-entropy ASLR configured in much newer kernels that GitHub
+              # runners are using leading to random crashes:
+              #   https://github.com/actions/runner-images/issues/9491
+              # can remove this once the issue is fixed.
+              sysctl -w vm.mmap_rnd_bits=28
+            fi
             env PATH="/usr/lib/ccache:$PATH" ASAN_OPTIONS=detect_leaks=0 python3 tests/main.py test

.github/workflows/check_style.yml

@@ -9,15 +9,22 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           persist-credentials: false
           fetch-depth: 0
+      - name: Checkout astyle
+        uses: actions/checkout@v4
+        with:
+          repository: szepeviktor/astyle
+          path: astyle
+          ref: v3.4.12
       - name: Install astyle
         run: |
-          sudo add-apt-repository -y "deb http://archive.ubuntu.com/ubuntu `lsb_release -sc` main universe restricted multiverse"
-          sudo apt-get update -y -qq
-          sudo apt-get install astyle
+          cd astyle/build/gcc/
+          make
+          sudo make install
+          astyle --version
       - name: Format code
         run: python code-format.py
         working-directory: scripts

Kconfig

@@ -1,4 +1,4 @@
-# Kconfig file for LVGL v8.0
+# Kconfig file for LVGL v8.4
 
 menu "LVGL configuration"
 
@@ -228,6 +228,16 @@ menu "LVGL configuration"
                     Must be defined to include path of CMSIS header of target processor
                     e.g. "stm32f769xx.h" or "stm32f429xx.h"
 
+            config LV_USE_GPU_RA6M3_G2D
+                bool "Enable RA6M3 G2D GPU."
+            config LV_GPU_RA6M3_G2D_INCLUDE
+                string "include path of target processor"
+                depends on LV_USE_GPU_RA6M3_G2D
+                default "hal_data.h"
+                help
+                    Must be defined to include path of target processor
+                    e.g. "hal_data.h"
+
             config LV_USE_GPU_SWM341_DMA2D
                 bool "Enable SWM341 DMA2D GPU."
             config LV_GPU_SWM341_DMA2D_INCLUDE
@@ -954,6 +964,17 @@ menu "LVGL configuration"
             default 0
             depends on LV_USE_FS_FATFS
 
+        config LV_USE_FS_LITTLEFS
+            bool "File system on top of LittleFS"
+        config LV_FS_LITTLEFS_LETTER
+            int "Set an upper cased letter on which the drive will accessible (e.g. 'A' i.e. 65)"
+            default 0
+            depends on LV_USE_FS_LITTLEFS
+        config LV_FS_LITTLEFS_CACHE_SIZE
+            int ">0 to cache this number of bytes in lv_fs_read()"
+            default 0
+            depends on LV_USE_FS_LITTLEFS
+
         config LV_USE_PNG
             bool "PNG decoder library"
 
@@ -990,6 +1011,13 @@ menu "LVGL configuration"
             endmenu
         endif
 
+        config LV_USE_TINY_TTF
+            bool "Tiny TTF library"
+        config LV_TINY_TTF_FILE_SUPPORT
+            bool "Load TTF data from files"
+            depends on LV_USE_TINY_TTF
+            default n
+
         config LV_USE_RLOTTIE
             bool "Lottie library"
 

demos/benchmark/lv_demo_benchmark.c

@@ -89,7 +89,7 @@ LV_FONT_DECLARE(lv_font_benchmark_montserrat_16_compr_az);
 LV_FONT_DECLARE(lv_font_benchmark_montserrat_28_compr_az);
 
 static void monitor_cb(lv_disp_drv_t * drv, uint32_t time, uint32_t px);
-static void scene_next_task_cb(lv_timer_t * timer);
+static void next_scene_timer_cb(lv_timer_t * timer);
 static void rect_create(lv_style_t * style);
 static void img_create(lv_style_t * style, const void * src, bool rotate, bool zoom, bool aa);
 static void txt_create(lv_style_t * style);
@@ -226,7 +226,6 @@ static void shadow_small_ofs_cb(void)
     rect_create(&style_common);
 }
 
-
 static void shadow_large_cb(void)
 {
     lv_style_reset(&style_common);
@@ -250,7 +249,6 @@ static void shadow_large_ofs_cb(void)
     rect_create(&style_common);
 }
 
-
 static void img_rgb_cb(void)
 {
     lv_style_reset(&style_common);
@@ -293,7 +291,6 @@ static void img_alpha_cb(void)
     img_create(&style_common, &img_benchmark_cogwheel_alpha16, false, false, false);
 }
 
-
 static void img_rgb_recolor_cb(void)
 {
     lv_style_reset(&style_common);
@@ -382,7 +379,6 @@ static void img_rgb_zoom_aa_cb(void)
     lv_style_set_img_opa(&style_common, opa_mode ? LV_OPA_50 : LV_OPA_COVER);
     img_create(&style_common, &img_benchmark_cogwheel_rgb, false, true, true);
 
-
 }
 
 static void img_argb_zoom_cb(void)
@@ -396,7 +392,6 @@ static void img_argb_zoom_cb(void)
 #endif
 }
 
-
 static void img_argb_zoom_aa_cb(void)
 {
     lv_style_reset(&style_common);
@@ -462,7 +457,6 @@ static void txt_large_compr_cb(void)
 
 }
 
-
 static void line_cb(void)
 {
     lv_style_reset(&style_common);
@@ -490,7 +484,6 @@ static void arc_thick_cb(void)
 
 }
 
-
 static void sub_rectangle_cb(void)
 {
     lv_style_reset(&style_common);
@@ -563,8 +556,6 @@ static void sub_text_cb(void)
     txt_create(&style_common);
 }
 
-
-
 /**********************
  *  STATIC VARIABLES
  **********************/
@@ -636,7 +627,7 @@ static lv_obj_t * scene_bg;
 static lv_obj_t * title;
 static lv_obj_t * subtitle;
 static uint32_t rnd_act;
-
+static lv_timer_t * next_scene_timer;
 
 static const uint32_t rnd_map[] = {
     0xbd13204f, 0x67d8167f, 0x20211c99, 0xb0a7cc05,
@@ -702,15 +693,26 @@ static void benchmark_init(void)
     lv_obj_update_layout(scr);
 }
 
-
 void lv_demo_benchmark(void)
 {
     benchmark_init();
 
     /*Manually start scenes*/
-    scene_next_task_cb(NULL);
+    next_scene_timer_cb(NULL);
 }
 
+void lv_demo_benchmark_close(void)
+{
+    if(next_scene_timer) lv_timer_del(next_scene_timer);
+    next_scene_timer = NULL;
+
+    lv_anim_del(NULL, NULL);
+
+    lv_style_reset(&style_common);
+
+    lv_obj_clean(lv_scr_act());
+
+}
 
 void lv_demo_benchmark_run_scene(int_fast16_t scene_no)
 {
@@ -738,7 +740,6 @@ void lv_demo_benchmark_run_scene(int_fast16_t scene_no)
     }
 }
 
-
 void lv_demo_benchmark_set_finished_cb(finished_cb_t * finished_cb)
 {
     benchmark_finished_cb = finished_cb;
@@ -787,7 +788,6 @@ static void generate_report(void)
         weight_opa_sum += w;
     }
 
-
     fps_sum = fps_normal_sum + fps_opa_sum;
     weight_sum = weight_normal_sum + weight_opa_sum;
 
@@ -804,7 +804,6 @@ static void generate_report(void)
     lv_obj_clean(lv_scr_act());
     scene_bg = NULL;
 
-
     lv_obj_set_flex_flow(lv_scr_act(), LV_FLEX_FLOW_COLUMN);
 
     title = lv_label_create(lv_scr_act());
@@ -840,7 +839,6 @@ static void generate_report(void)
     //        lv_obj_add_style(table, LV_TABLE_PART_CELL3, &style_cell_very_slow);
     //        lv_obj_add_style(table, LV_TABLE_PART_CELL4, &style_cell_title);
 
-
     uint16_t row = 0;
     lv_table_add_cell_ctrl(table, row, 0, LV_TABLE_CELL_CTRL_MERGE_RIGHT);
     lv_table_set_cell_value(table, row, 0, "Slow but common cases");
@@ -927,7 +925,6 @@ static void generate_report(void)
         lv_snprintf(buf, sizeof(buf), "%"LV_PRIu32, scenes[i].fps_opa);
         lv_table_set_cell_value(table, row, 1, buf);
 
-
         if(scenes[i].fps_opa < 10) {
             //                lv_table_set_cell_type(table, row, 0, 3);
             //                lv_table_set_cell_type(table, row, 1, 3);
@@ -973,11 +970,13 @@ static void report_cb(lv_timer_t * timer)
     }
 }
 
-static void scene_next_task_cb(lv_timer_t * timer)
+static void next_scene_timer_cb(lv_timer_t * timer)
 {
     LV_UNUSED(timer);
     lv_obj_clean(scene_bg);
 
+    next_scene_timer = NULL;
+
     if(opa_mode) {
         if(scene_act >= 0) {
             if(scenes[scene_act].time_sum_opa == 0) scenes[scene_act].time_sum_opa = 1;
@@ -1014,8 +1013,8 @@ static void scene_next_task_cb(lv_timer_t * timer)
 
         rnd_reset();
         scenes[scene_act].create_cb();
-        lv_timer_t * t = lv_timer_create(scene_next_task_cb, SCENE_TIME, NULL);
-        lv_timer_set_repeat_count(t, 1);
+        next_scene_timer = lv_timer_create(next_scene_timer_cb, SCENE_TIME, NULL);
+        lv_timer_set_repeat_count(next_scene_timer, 1);
 
     }
     /*Ready*/
@@ -1037,7 +1036,6 @@ static void scene_next_task_cb(lv_timer_t * timer)
     }
 }
 
-
 static void rect_create(lv_style_t * style)
 {
     uint32_t i;
@@ -1055,7 +1053,6 @@ static void rect_create(lv_style_t * style)
     }
 }
 
-
 static void img_create(lv_style_t * style, const void * src, bool rotate, bool zoom, bool aa)
 {
     uint32_t i;
@@ -1074,7 +1071,6 @@ static void img_create(lv_style_t * style, const void * src, bool rotate, bool z
     }
 }
 
-
 static void txt_create(lv_style_t * style)
 {
     uint32_t i;
@@ -1090,7 +1086,6 @@ static void txt_create(lv_style_t * style)
     }
 }
 
-
 static void line_create(lv_style_t * style)
 {
     static lv_point_t points[OBJ_NUM][LINE_POINT_NUM];
@@ -1105,7 +1100,6 @@ static void line_create(lv_style_t * style)
             points[i][j].y = rnd_next(LINE_POINT_DIFF_MIN, LINE_POINT_DIFF_MAX);
         }
 
-
         lv_obj_t * obj = lv_line_create(scene_bg);
         lv_obj_remove_style_all(obj);
         lv_obj_add_style(obj, style, 0);
@@ -1118,7 +1112,6 @@ static void line_create(lv_style_t * style)
     }
 }
 
-
 static void arc_anim_end_angle_cb(void * var, int32_t v)
 {
     lv_arc_set_end_angle(var, v);
@@ -1152,7 +1145,6 @@ static void arc_create(lv_style_t * style)
     }
 }
 
-
 static void fall_anim_y_cb(void * var, int32_t v)
 {
     lv_obj_set_y(var, v);

demos/benchmark/lv_demo_benchmark.h

@@ -24,12 +24,13 @@ extern "C" {
  **********************/
 typedef void finished_cb_t(void);
 
-
 /**********************
  * GLOBAL PROTOTYPES
  **********************/
 void lv_demo_benchmark(void);
 
+void lv_demo_benchmark_close(void);
+
 void lv_demo_benchmark_run_scene(int_fast16_t scene_no);
 
 void lv_demo_benchmark_set_finished_cb(finished_cb_t * finished_cb);

demos/keypad_encoder/lv_demo_keypad_encoder.c

@@ -46,8 +46,11 @@ static lv_obj_t * t2;
 
 void lv_demo_keypad_encoder(void)
 {
-    g = lv_group_create();
-    lv_group_set_default(g);
+    g = lv_group_get_default();
+    if(g == NULL) {
+        g = lv_group_create();
+        lv_group_set_default(g);
+    }
 
     lv_indev_t * cur_drv = NULL;
     for(;;) {
@@ -76,6 +79,12 @@ void lv_demo_keypad_encoder(void)
     msgbox_create();
 }
 
+void lv_demo_keypad_encoder_close(void)
+{
+    lv_obj_clean(lv_scr_act());
+    lv_obj_clean(lv_layer_top());
+}
+
 /**********************
  *   STATIC FUNCTIONS
  **********************/

demos/keypad_encoder/lv_demo_keypad_encoder.h

@@ -27,6 +27,7 @@ extern "C" {
  * GLOBAL PROTOTYPES
  **********************/
 void lv_demo_keypad_encoder(void);
+void lv_demo_keypad_encoder_close(void);
 
 /**********************
  *      MACROS

demos/lv_demos.h

@@ -47,7 +47,6 @@ extern "C" {
  * GLOBAL PROTOTYPES
  **********************/
 
-
 /**********************
  *      MACROS
  **********************/

demos/music/lv_demo_music.c

@@ -103,6 +103,12 @@ static const uint32_t time_list[] = {
     2 * 60 + 19,
 };
 
+#if LV_DEMO_MUSIC_AUTO_PLAY
+    static lv_timer_t * auto_step_timer;
+#endif
+
+static lv_color_t original_screen_bg_color;
+
 /**********************
  *      MACROS
  **********************/
@@ -113,16 +119,33 @@ static const uint32_t time_list[] = {
 
 void lv_demo_music(void)
 {
+    original_screen_bg_color = lv_obj_get_style_bg_color(lv_scr_act(), 0);
     lv_obj_set_style_bg_color(lv_scr_act(), lv_color_hex(0x343247), 0);
 
     list = _lv_demo_music_list_create(lv_scr_act());
     ctrl = _lv_demo_music_main_create(lv_scr_act());
 
 #if LV_DEMO_MUSIC_AUTO_PLAY
-    lv_timer_create(auto_step_cb, 1000, NULL);
+    auto_step_timer = lv_timer_create(auto_step_cb, 1000, NULL);
 #endif
 }
 
+void lv_demo_music_close(void)
+{
+    /*Delete all aniamtions*/
+    lv_anim_del(NULL, NULL);
+
+#if LV_DEMO_MUSIC_AUTO_PLAY
+    lv_timer_del(auto_step_timer);
+#endif
+    _lv_demo_music_list_close();
+    _lv_demo_music_main_close();
+
+    lv_obj_clean(lv_scr_act());
+
+    lv_obj_set_style_bg_color(lv_scr_act(), original_screen_bg_color, 0);
+}
+
 const char * _lv_demo_music_get_title(uint32_t track_id)
 {
     if(track_id >= sizeof(title_list) / sizeof(title_list[0])) return NULL;

demos/music/lv_demo_music.h

@@ -36,6 +36,8 @@ extern "C" {
  **********************/
 
 void lv_demo_music(void);
+void lv_demo_music_close(void);
+
 const char * _lv_demo_music_get_title(uint32_t track_id);
 const char * _lv_demo_music_get_artist(uint32_t track_id);
 const char * _lv_demo_music_get_genre(uint32_t track_id);

demos/music/lv_demo_music_list.c

@@ -130,6 +130,18 @@ lv_obj_t * _lv_demo_music_list_create(lv_obj_t * parent)
     return list;
 }
 
+void _lv_demo_music_list_close(void)
+{
+    lv_style_reset(&style_scrollbar);
+    lv_style_reset(&style_btn);
+    lv_style_reset(&style_btn_pr);
+    lv_style_reset(&style_btn_chk);
+    lv_style_reset(&style_btn_dis);
+    lv_style_reset(&style_title);
+    lv_style_reset(&style_artist);
+    lv_style_reset(&style_time);
+}
+
 void _lv_demo_music_list_btn_check(uint32_t track_id, bool state)
 {
     lv_obj_t * btn = lv_obj_get_child(list, track_id);
@@ -205,7 +217,6 @@ static lv_obj_t * add_list_btn(lv_obj_t * parent, uint32_t track_id)
     return btn;
 }
 
-
 static void btn_click_event_cb(lv_event_t * e)
 {
     lv_obj_t * btn = lv_event_get_target(e);
@@ -215,4 +226,3 @@ static void btn_click_event_cb(lv_event_t * e)
     _lv_demo_music_play(idx);
 }
 #endif /*LV_USE_DEMO_MUSIC*/
-

demos/music/lv_demo_music_list.h

@@ -28,6 +28,8 @@ extern "C" {
  * GLOBAL PROTOTYPES
  **********************/
 lv_obj_t * _lv_demo_music_list_create(lv_obj_t * parent);
+void _lv_demo_music_list_close(void);
+
 void _lv_demo_music_list_btn_check(uint32_t track_id, bool state);
 
 /**********************

demos/music/lv_demo_music_main.c

@@ -60,7 +60,7 @@ static void prev_click_event_cb(lv_event_t * e);
 static void next_click_event_cb(lv_event_t * e);
 static void timer_cb(lv_timer_t * t);
 static void track_load(uint32_t id);
-static void stop_start_anim(lv_timer_t * t);
+static void stop_start_anim_timer_cb(lv_timer_t * t);
 static void spectrum_end_cb(lv_anim_t * a);
 static void album_fade_anim_cb(void * var, int32_t v);
 static int32_t get_cos(int32_t deg, int32_t a);
@@ -84,6 +84,7 @@ static uint32_t spectrum_lane_ofs_start = 0;
 static uint32_t bar_rot = 0;
 static uint32_t time_act;
 static lv_timer_t  * sec_counter_timer;
+static lv_timer_t * stop_start_anim_timer;
 static const lv_font_t * font_small;
 static const lv_font_t * font_large;
 static uint32_t track_id;
@@ -232,8 +233,8 @@ lv_obj_t * _lv_demo_music_main_create(lv_obj_t * parent)
 
     start_anim = true;
 
-    lv_timer_t * timer = lv_timer_create(stop_start_anim, INTRO_TIME + 6000, NULL);
-    lv_timer_set_repeat_count(timer, 1);
+    stop_start_anim_timer = lv_timer_create(stop_start_anim_timer_cb, INTRO_TIME + 6000, NULL);
+    lv_timer_set_repeat_count(stop_start_anim_timer, 1);
 
     lv_anim_init(&a);
     lv_anim_set_path_cb(&a, lv_anim_path_bounce);
@@ -292,6 +293,12 @@ lv_obj_t * _lv_demo_music_main_create(lv_obj_t * parent)
     return main_cont;
 }
 
+void _lv_demo_music_main_close(void)
+{
+    if(stop_start_anim_timer) lv_timer_del(stop_start_anim_timer);
+    lv_timer_del(sec_counter_timer);
+}
+
 void _lv_demo_music_album_next(bool next)
 {
     uint32_t id = track_id;
@@ -762,7 +769,7 @@ static void spectrum_draw_event_cb(lv_event_t * e)
         lv_obj_t * obj = lv_event_get_target(e);
         lv_draw_ctx_t * draw_ctx = lv_event_get_draw_ctx(e);
 
-        lv_opa_t opa = lv_obj_get_style_opa(obj, LV_PART_MAIN);
+        lv_opa_t opa = lv_obj_get_style_opa_recursive(obj, LV_PART_MAIN);
         if(opa < LV_OPA_MIN) return;
 
         lv_point_t poly[4];
@@ -974,7 +981,6 @@ static void next_click_event_cb(lv_event_t * e)
     }
 }
 
-
 static void timer_cb(lv_timer_t * t)
 {
     LV_UNUSED(t);
@@ -989,11 +995,11 @@ static void spectrum_end_cb(lv_anim_t * a)
     _lv_demo_music_album_next(true);
 }
 
-
-static void stop_start_anim(lv_timer_t * t)
+static void stop_start_anim_timer_cb(lv_timer_t * t)
 {
     LV_UNUSED(t);
     start_anim = false;
+    stop_start_anim_timer = NULL;
     lv_obj_refresh_ext_draw_size(spectrum_obj);
 }
 
@@ -1002,4 +1008,3 @@ static void album_fade_anim_cb(void * var, int32_t v)
     lv_obj_set_style_img_opa(var, v, 0);
 }
 #endif /*LV_USE_DEMO_MUSIC*/
-

demos/music/lv_demo_music_main.h

@@ -28,6 +28,8 @@ extern "C" {
  * GLOBAL PROTOTYPES
  **********************/
 lv_obj_t * _lv_demo_music_main_create(lv_obj_t * parent);
+void _lv_demo_music_main_close(void);
+
 void _lv_demo_music_play(uint32_t id);
 void _lv_demo_music_resume(void);
 void _lv_demo_music_pause(void);
@@ -38,7 +40,6 @@ void _lv_demo_music_album_next(bool next);
  **********************/
 #endif /*LV_USE_DEMO_MUSIC*/
 
-
 #ifdef __cplusplus
 } /* extern "C" */
 #endif

demos/stress/lv_demo_stress.c

@@ -25,7 +25,7 @@ static void msgbox_del(lv_timer_t * tmr);
 static void set_y_anim(void * obj, int32_t v);
 static void set_width_anim(void * obj, int32_t v);
 static void arc_set_end_angle_anim(void * obj, int32_t v);
-static void obj_test_task_cb(lv_timer_t * tmr);
+static void obj_test_timer_cb(lv_timer_t * tmr);
 
 /**********************
  *  STATIC VARIABLES
@@ -34,6 +34,10 @@ static lv_obj_t * main_page;
 static lv_obj_t * ta;
 static const char * mbox_btns[] = {"Ok", "Cancel", ""};
 static uint32_t mem_free_start = 0;
+static lv_timer_t * obj_test_timer;
+static int16_t state;
+static lv_timer_t * msgbox_tmr;
+
 /**********************
  *      MACROS
  **********************/
@@ -45,23 +49,34 @@ static uint32_t mem_free_start = 0;
 void lv_demo_stress(void)
 {
     LV_LOG_USER("Starting stress test. (< 100 bytes permanent memory leak is normal due to fragmentation)");
-    lv_timer_create(obj_test_task_cb, LV_DEMO_STRESS_TIME_STEP, NULL);
+    obj_test_timer = lv_timer_create(obj_test_timer_cb, LV_DEMO_STRESS_TIME_STEP, NULL);
+    state = -1;
+}
+
+void lv_demo_stress_close(void)
+{
+    lv_timer_del(obj_test_timer);
+    obj_test_timer = NULL;
+    if(msgbox_tmr) {
+        lv_timer_del(msgbox_tmr);
+        msgbox_tmr = NULL;
+    }
+
+    lv_obj_clean(lv_scr_act());
+    lv_obj_clean(lv_layer_top());
 }
 
 /**********************
  *   STATIC FUNCTIONS
  **********************/
 
-static void obj_test_task_cb(lv_timer_t * tmr)
+static void obj_test_timer_cb(lv_timer_t * tmr)
 {
     (void) tmr;    /*Unused*/
-    static int16_t state = -1;
 
     lv_anim_t a;
     lv_obj_t * obj;
 
-    //    printf("step start: %d\n", state);
-
     switch(state) {
         case -1: {
                 lv_res_t res = lv_mem_test();
@@ -83,7 +98,6 @@ static void obj_test_task_cb(lv_timer_t * tmr)
             lv_obj_set_size(main_page, LV_HOR_RES / 2, LV_VER_RES);
             lv_obj_set_flex_flow(main_page, LV_FLEX_FLOW_COLUMN);
 
-
             obj = lv_btn_create(main_page);
             lv_obj_set_size(obj, 100, 70);
             obj = lv_label_create(obj);
@@ -246,8 +260,7 @@ static void obj_test_task_cb(lv_timer_t * tmr)
 
         case 14:
             obj = lv_msgbox_create(NULL, "Title", "Some text on the message box with average length", mbox_btns, true);
-
-            lv_timer_t * msgbox_tmr = lv_timer_create(msgbox_del, LV_DEMO_STRESS_TIME_STEP * 5 + 30, obj);
+            msgbox_tmr = lv_timer_create(msgbox_del, LV_DEMO_STRESS_TIME_STEP * 5 + 30, obj);
             lv_timer_set_repeat_count(msgbox_tmr, 1);
             lv_obj_align(obj, LV_ALIGN_RIGHT_MID, -10, 0);
             break;
@@ -439,6 +452,7 @@ static void auto_del(lv_obj_t * obj, uint32_t delay)
 
 static void msgbox_del(lv_timer_t * tmr)
 {
+    msgbox_tmr = NULL;
     lv_msgbox_close(tmr->user_data);
 }
 

demos/stress/lv_demo_stress.h

@@ -30,6 +30,8 @@ extern "C" {
  **********************/
 void lv_demo_stress(void);
 
+void lv_demo_stress_close(void);
+
 /**********************
  *      MACROS
  **********************/

demos/widgets/lv_demo_widgets.c

@@ -86,6 +86,8 @@ static uint32_t session_desktop = 1000;
 static uint32_t session_tablet = 1000;
 static uint32_t session_mobile = 1000;
 
+static lv_timer_t * meter2_timer;
+
 /**********************
  *      MACROS
  **********************/
@@ -196,6 +198,22 @@ void lv_demo_widgets(void)
     color_changer_create(tv);
 }
 
+void lv_demo_widgets_close(void)
+{
+    /*Delete all animation*/
+    lv_anim_del(NULL, NULL);
+
+    lv_timer_del(meter2_timer);
+    meter2_timer = NULL;
+
+    lv_obj_clean(lv_scr_act());
+
+    lv_style_reset(&style_text_muted);
+    lv_style_reset(&style_title);
+    lv_style_reset(&style_icon);
+    lv_style_reset(&style_bullet);
+}
+
 /**********************
  *   STATIC FUNCTIONS
  **********************/
@@ -340,7 +358,6 @@ static void profile_create(lv_obj_t * parent)
             LV_GRID_TEMPLATE_LAST
         };
 
-
         lv_obj_set_grid_dsc_array(parent, grid_main_col_dsc, grid_main_row_dsc);
 
         lv_obj_set_grid_cell(panel1, LV_GRID_ALIGN_STRETCH, 0, 2, LV_GRID_ALIGN_CENTER, 0, 1);
@@ -368,7 +385,6 @@ static void profile_create(lv_obj_t * parent)
         lv_obj_set_grid_cell(gender, LV_GRID_ALIGN_STRETCH, 0, 1, LV_GRID_ALIGN_CENTER, 6, 1);
         lv_obj_set_grid_cell(gender_label, LV_GRID_ALIGN_START, 0, 1, LV_GRID_ALIGN_START, 5, 1);
 
-
         lv_obj_set_grid_cell(panel3, LV_GRID_ALIGN_STRETCH, 1, 1, LV_GRID_ALIGN_STRETCH, 1, 1);
         lv_obj_set_grid_dsc_array(panel3, grid_2_col_dsc, grid_2_row_dsc);
         lv_obj_set_grid_cell(panel3_title, LV_GRID_ALIGN_START, 0, 2, LV_GRID_ALIGN_CENTER, 0, 1);
@@ -383,7 +399,6 @@ static void profile_create(lv_obj_t * parent)
         static lv_coord_t grid_main_col_dsc[] = {LV_GRID_FR(1), LV_GRID_FR(1), LV_GRID_TEMPLATE_LAST};
         static lv_coord_t grid_main_row_dsc[] = {LV_GRID_CONTENT, LV_GRID_CONTENT, LV_GRID_TEMPLATE_LAST};
 
-
         /*Create the top panel*/
         static lv_coord_t grid_1_col_dsc[] = {LV_GRID_CONTENT, 1, LV_GRID_CONTENT, LV_GRID_FR(1), LV_GRID_TEMPLATE_LAST};
         static lv_coord_t grid_1_row_dsc[] = {
@@ -411,7 +426,6 @@ static void profile_create(lv_obj_t * parent)
             LV_GRID_TEMPLATE_LAST
         };
 
-
         lv_obj_set_grid_dsc_array(parent, grid_main_col_dsc, grid_main_row_dsc);
         lv_obj_set_grid_cell(panel1, LV_GRID_ALIGN_STRETCH, 0, 2, LV_GRID_ALIGN_CENTER, 0, 1);
 
@@ -456,7 +470,6 @@ static void profile_create(lv_obj_t * parent)
         static lv_coord_t grid_main_row_dsc[] = {LV_GRID_CONTENT, LV_GRID_CONTENT, LV_GRID_CONTENT, LV_GRID_TEMPLATE_LAST};
         lv_obj_set_grid_dsc_array(parent, grid_main_col_dsc, grid_main_row_dsc);
 
-
         /*Create the top panel*/
         static lv_coord_t grid_1_col_dsc[] = {LV_GRID_CONTENT, LV_GRID_FR(1), LV_GRID_TEMPLATE_LAST};
         static lv_coord_t grid_1_row_dsc[] = {LV_GRID_CONTENT, /*Avatar*/
@@ -471,7 +484,6 @@ static void profile_create(lv_obj_t * parent)
 
         lv_obj_set_grid_dsc_array(panel1, grid_1_col_dsc, grid_1_row_dsc);
 
-
         static lv_coord_t grid_2_col_dsc[] = {LV_GRID_FR(1), LV_GRID_FR(1), LV_GRID_TEMPLATE_LAST};
         static lv_coord_t grid_2_row_dsc[] = {
             LV_GRID_CONTENT,  /*Title*/
@@ -526,7 +538,6 @@ static void profile_create(lv_obj_t * parent)
     }
 }
 
-
 static void analytics_create(lv_obj_t * parent)
 {
     lv_obj_set_flex_flow(parent, LV_FLEX_FLOW_ROW_WRAP);
@@ -698,7 +709,7 @@ static void analytics_create(lv_obj_t * parent)
     lv_meter_set_indicator_start_value(meter2, meter2_indic[2], 70);
     lv_meter_set_indicator_end_value(meter2, meter2_indic[2], 99);
 
-    lv_timer_create(meter2_timer_cb, 100, meter2_indic);
+    meter2_timer = lv_timer_create(meter2_timer_cb, 100, meter2_indic);
 
     meter3 = create_meter_box(parent, "Network Speed", "Low speed", "Normal Speed", "High Speed");
     if(disp_size < DISP_LARGE) lv_obj_add_flag(lv_obj_get_parent(meter3), LV_OBJ_FLAG_FLEX_IN_NEW_TRACK);
@@ -840,7 +851,6 @@ void shop_create(lv_obj_t * parent)
         lv_obj_set_size(chart3, lv_pct(100), lv_pct(100));
         lv_obj_set_style_pad_column(chart3, LV_DPX(30), 0);
 
-
         lv_obj_set_grid_dsc_array(panel1, grid1_col_dsc, grid1_row_dsc);
         lv_obj_set_grid_cell(title, LV_GRID_ALIGN_START, 0, 1, LV_GRID_ALIGN_START, 0, 1);
         lv_obj_set_grid_cell(date, LV_GRID_ALIGN_START, 0, 1, LV_GRID_ALIGN_START, 1, 1);
@@ -956,7 +966,6 @@ void shop_create(lv_obj_t * parent)
     cb = lv_checkbox_create(notifications);
     lv_checkbox_set_text(cb, "Out of stock");
 
-
 }
 
 static void color_changer_create(lv_obj_t * parent)
@@ -1162,7 +1171,6 @@ static lv_obj_t * create_meter_box(lv_obj_t * parent, const char * title, const
         lv_obj_set_grid_cell(label3, LV_GRID_ALIGN_STRETCH, 1, 1, LV_GRID_ALIGN_START, 4, 1);
     }
 
-
     return meter;
 
 }
@@ -1380,7 +1388,6 @@ static void chart_event_cb(lv_event_t * e)
             }
 #endif
 
-
             const lv_chart_series_t * ser = dsc->sub_part_ptr;
 
             if(lv_chart_get_pressed_point(obj) == dsc->id) {
@@ -1446,7 +1453,6 @@ static void chart_event_cb(lv_event_t * e)
     }
 }
 
-
 static void shop_chart_event_cb(lv_event_t * e)
 {
     lv_event_code_t code = lv_event_get_code(e);
@@ -1498,7 +1504,6 @@ static void shop_chart_event_cb(lv_event_t * e)
     }
 }
 
-
 static void meter1_indic1_anim_cb(void * var, int32_t v)
 {
     lv_meter_set_indicator_end_value(meter1, var, v);
@@ -1535,7 +1540,6 @@ static void meter2_timer_cb(lv_timer_t * timer)
     static bool down2 = false;
     static bool down3 = false;
 
-
     if(down1) {
         session_desktop -= 137;
         if(session_desktop < 1400) down1 = false;

demos/widgets/lv_demo_widgets.h

@@ -27,6 +27,7 @@ extern "C" {
  * GLOBAL PROTOTYPES
  **********************/
 void lv_demo_widgets(void);
+void lv_demo_widgets_close(void);
 
 /**********************
  *      MACROS

docs/CHANGELOG.md

@@ -1,5 +1,188 @@
 # Changelog
 
+## [v8.3.11](https://github.com/lvgl/lvgl/compare/v8.3.11...v8.3.10) 6 December 2023
+
+### New Features
+
+- feat(table): add user_data to table cells [`4767`](https://github.com/lvgl/lvgl/pull/4767)
+- feat(tiny_ttf): backport Tiny TTF to lvgl 8 [`4727`](https://github.com/lvgl/lvgl/pull/4727)
+- feat(littlefs): add lv_fs_littlefs system as a driver [`4677`](https://github.com/lvgl/lvgl/pull/4677)
+
+### Fixes
+
+- fix(obj): readjust scroll after layout when child removed [`4921`](https://github.com/lvgl/lvgl/pull/4921)
+- fix(rt-thread): fix create lvgl thread problem [`4862`](https://github.com/lvgl/lvgl/pull/4862)
+- fix(obj): fix arduino compile warnings [`4807`](https://github.com/lvgl/lvgl/pull/4807)
+- fix(table):fix issue with abnormal string output of 'lv_table_set_cell_value_fmt' [`4804`](https://github.com/lvgl/lvgl/pull/4804)
+- fix(table) user data API functions renamed [`4769`](https://github.com/lvgl/lvgl/pull/4769)
+- fix(ime_pinyin): keep cursor in the textarea when a candidate is pressed [`4731`](https://github.com/lvgl/lvgl/pull/4731)
+- fix(draw_needles): changed needle line draw start point from scale ce… [`4682`](https://github.com/lvgl/lvgl/pull/4682)
+- fix(arc): handle click outside background angle range (#4586) [`4667`](https://github.com/lvgl/lvgl/pull/4667)
+- fix(meter):  fix minor issues [`4657`](https://github.com/lvgl/lvgl/pull/4657)
+- fix(draw): fix compiler error in lv_draw_sw_transform.c #2 [`4612`](https://github.com/lvgl/lvgl/pull/4612)
+- fix(dropdown): avoid partial match in lv_dropdown_get_option_index [`4598`](https://github.com/lvgl/lvgl/pull/4598)
+- fix(dropdown): reset char_i = 0, avoid access overflow [`4589`](https://github.com/lvgl/lvgl/pull/4589)
+- fix(btnmatrix): set LV_BTNMATRIX_BTN_NONE when clicking of disabled button (#4571) [`4578`](https://github.com/lvgl/lvgl/pull/4578)
+- fix(qrcode): use LV_ASSERT instead of assert [`1840dec`](https://github.com/lvgl/lvgl/commit/1840decb4136ba01552fcb7cedb0ff759824e2fd)
+- fix: fix warning in lv_draw_sw_letter.c [`d22cda3`](https://github.com/lvgl/lvgl/commit/d22cda3cdb15cee95763491db95753980846d9f9)
+- fix(arc): fix setting value by click [`20b6199`](https://github.com/lvgl/lvgl/commit/20b6199ba90319942c3cd91f2c727da6cd40cd2d)
+- fix(disp): fix infinite recursive SCREEN_LOADED events [`ef76206`](https://github.com/lvgl/lvgl/commit/ef76206c75ea9de26407534a9ce1079dc8e750e3)
+- fix(keyboard): add '&' character [`d20bd1c`](https://github.com/lvgl/lvgl/commit/d20bd1ca397ff954167dd496cf1a78da8814f602)
+- fix(draw): fix scaling rectangle parts with opa [`7a8fcbf`](https://github.com/lvgl/lvgl/commit/7a8fcbfd3458739cbe64b29767a969ece9542039)
+
+### Docs
+
+- docs(obj): fix wording [`4625`](https://github.com/lvgl/lvgl/pull/4625)
+- docs(label): update text for recoloring [`4606`](https://github.com/lvgl/lvgl/pull/4606)
+- docs: fix typo [`9fbac75`](https://github.com/lvgl/lvgl/commit/9fbac7570bdec18ddbb157b59f5e26a2ebdf5daf)
+
+### Others
+
+- chore(cmsis-pack): prepare for v8.3.11 [`4936`](https://github.com/lvgl/lvgl/pull/4936)
+- chore(cmake): add support for user-specified lv_conf.h path [`4689`](https://github.com/lvgl/lvgl/pull/4689)
+- STM32U5 DMA2D support (8.3) [`4643`](https://github.com/lvgl/lvgl/pull/4643)
+- backport: fix(lv_disp): fix lv_scr_load_anim being called twice quickly [`4629`](https://github.com/lvgl/lvgl/pull/4629)
+- chore(lv_draw_sw_letter.c): Fix print format [`4615`](https://github.com/lvgl/lvgl/pull/4615)
+- chore: fix compile error [`7568df7`](https://github.com/lvgl/lvgl/commit/7568df77d16ecbf2242b2bc290dc8fc0eb29cf5a)
+
+## [v8.3.10](https://github.com/lvgl/lvgl/compare/v8.3.10...v8.3.9) 20 September 2023
+
+### New Features
+
+- feat(disp): add double buffered direct-mode efficient sync algorithm (v8.3) [`4497`](https://github.com/lvgl/lvgl/pull/4497)
+- feat(style): backport opa_layered [`6548ea0`](https://github.com/lvgl/lvgl/commit/6548ea0f291be8a97afb3c4d7dcabbe465ae5a04)
+
+
+### Fixes
+
+- fix: build on Windows (MinGW environment) [`4538`](https://github.com/lvgl/lvgl/pull/4538)
+- fix(docs): dropdown: fix function name in description of static options [`4535`](https://github.com/lvgl/lvgl/pull/4535)
+- fix: do not copy invalid areas if not double buffered mode [`4526`](https://github.com/lvgl/lvgl/pull/4526)
+- fix(sdl): add missing parameter in lv_draw_sdl_composite_texture_obtain [`4490`](https://github.com/lvgl/lvgl/pull/4490)
+- fix(dropdown): position to the selected item in lv_dropdown_set_selected [`f174589`](https://github.com/lvgl/lvgl/commit/f174589240b099a349e54ba09aa9b39c2b347341)
+- fix(vglite): be sure end_angle > start_angle in arc drawing [`01cd1fe`](https://github.com/lvgl/lvgl/commit/01cd1fed9db974aa616a6289a29171b7a971cd89)
+- fix(btnmatrix): fix tapping just outside a button in a buttonmatrix [`8063fac`](https://github.com/lvgl/lvgl/commit/8063fac793b0a09add1e57c1115b734659274e6f)
+
+
+### Docs
+
+- docs(calendar): update according to v8.2 changes [`a296456`](https://github.com/lvgl/lvgl/commit/a296456591f6ff0e3b3ae6cdcdd9ec5b1711c357)
+- docs(simulator): remove SDL support from the Visual Studio project [`bcebafe`](https://github.com/lvgl/lvgl/commit/bcebafe4fb72e336b7dedca89c07e334427eef8d)
+
+### CI and tests
+
+- ci: update screenshot compare from v9 to automatically create missing reference images [`fd21ed0`](https://github.com/lvgl/lvgl/commit/fd21ed0eb82bacb1e482180ab0aaed6a667f000d)
+- ci(dropdown): fix test [`5fc488a`](https://github.com/lvgl/lvgl/commit/5fc488a088639dbfb5eb44f65b05e13b6ba881bf)
+
+### Others
+
+- chore(cmsis-pack): create cmsis-pack for v8.3.10 [`4572`](https://github.com/lvgl/lvgl/pull/4572)
+- Update screen object opacity function documentation [`4505`](https://github.com/lvgl/lvgl/pull/4505)
+- demo(sress): fix issues when the stress test is opened/clsoed multiple times [`1c5df6c`](https://github.com/lvgl/lvgl/commit/1c5df6c665b0d5f6f346d45b13109ff1f6ea78a6)
+- chore: code formatting [`eb87767`](https://github.com/lvgl/lvgl/commit/eb87767cc65fec93f9cc4f87a1f8fb5b32f7e41d)
+
+
+## [v8.3.9](https://github.com/lvgl/lvgl/compare/v8.3.9...v8.3.8) 6 August 2023
+
+
+### Fixes
+
+- fix(decoder): fix LV_IMG_CF_ALPHA_8BIT bin file decoder [`4406`](https://github.com/lvgl/lvgl/pull/4406)
+- fix(config): fix typo in LV_USE_PERF_MONITOR and LV_USE_MEM_MONITOR [`4403`](https://github.com/lvgl/lvgl/pull/4403)
+- fix(attr): refactor LV_ATTRIBUTE_* for function attributes [`4404`](https://github.com/lvgl/lvgl/pull/4404)
+- fix(font): fix optimizer issue in  lv_font_fmt_txt.c [`4385`](https://github.com/lvgl/lvgl/pull/4385)
+- fix(btnmatrix): Hide button matrix when all buttons hidden [`65f1c93`](https://github.com/lvgl/lvgl/commit/65f1c9305e1b13356010524da4764fe20fe93030)
+- fix(obj) prevent hidden objects keeping focus [`375b3b5`](https://github.com/lvgl/lvgl/commit/375b3b5d3ef2ea8c52f971a1bf20998be7940d5e)
+- fix(btnmatrix): Fix typo in previous commit! [`29ed7c5`](https://github.com/lvgl/lvgl/commit/29ed7c5717f6cfbca5ce888bf4497221525aae85)
+- fix(tabview): fix warning [`223dc1c`](https://github.com/lvgl/lvgl/commit/223dc1cf9d1cad0f40caf244eb435af0871f4153)
+- fix(indev): fix warnings when loggin coordinates is enabled [`645006e`](https://github.com/lvgl/lvgl/commit/645006e35195cab3354f34a1a8cbc8c5ed0fdfad)
+- fix: use const lv_img_dsc_t * dsc function parameter in lv_img_buf.h/ [`4f102d7`](https://github.com/lvgl/lvgl/commit/4f102d7b6b2e9f9fa68ab7b976d93762107549a4)
+- fix(chart): fix lv_chart_get_point_pos_by_id [`f9ffcc9`](https://github.com/lvgl/lvgl/commit/f9ffcc9d8e11beb369dcbab0945ca85eab8f77b2)
+- fix(imgbtn): support LV_OBJ_FLAG_CHECKABLE [`385d999`](https://github.com/lvgl/lvgl/commit/385d999a4a8164fcde6ae05f6a5daa5d5c209dd3)
+
+
+### Docs
+
+- docs(disp): metined that rotation rotates the touch coordinates too [`810852b`](https://github.com/lvgl/lvgl/commit/810852b41be5df66fd7b80f8af69f8b579d142ea)
+
+
+### Others
+
+- demos: add lv_demo_..._close() functions for each demo [`91038a9`](https://github.com/lvgl/lvgl/commit/91038a99e82a2522f693c7cdc77e9e7a672ee9ed)
+
+
+## [v8.3.8](https://github.com/lvgl/lvgl/compare/v8.3.8...v8.3.7) 5 July 2023
+
+### New Features
+
+- feat(rt-thread): make the rt-thread env recursively glob the UI files [`8b83fe7`](https://github.com/lvgl/lvgl/commit/8b83fe7ea53a597cdbae8204d0aa9be8ad3d2b89)
+
+### Performance
+
+- perf(pxp, vglite): improve performance and add more features [`4222`](https://github.com/lvgl/lvgl/pull/4222)
+
+### Fixes
+
+- fix(stm32): static function prototypes moved from .h to .c [`4276`](https://github.com/lvgl/lvgl/pull/4276)
+- fix(png): fix decode image size and some warnings [`4248`](https://github.com/lvgl/lvgl/pull/4248)
+- fix(bidi): add more Hebrew checks to RTL characters set (#4171) [`4239`](https://github.com/lvgl/lvgl/pull/4239)
+- fix(img): fix getting the image type on big endian systems [`4215`](https://github.com/lvgl/lvgl/pull/4215)
+- fix(sdl): destroy texture after use if not stored in cache [`4173`](https://github.com/lvgl/lvgl/pull/4173)
+
+- fix:(BtnMatrix) Backport https://github.com/lvgl/lvgl/pull/4185 [`cb602ea`](https://github.com/lvgl/lvgl/commit/cb602ea7785de21a187ef5ee5f7de4e3aa3f7e0e)
+- fix(arduino): fix messed up variable types [`e3659c4`](https://github.com/lvgl/lvgl/commit/e3659c46b128b2b715b196c3ccfb94b3de4c89f8)
+- fix:(BtnMatrix) Backport https://github.com/lvgl/lvgl/pull/4185 [`07bce74`](https://github.com/lvgl/lvgl/commit/07bce7466d471a15ba241a9db3239f7a116b0b46)
+- fix(chart): fix division by zero if there are no ticks [`67b3011`](https://github.com/lvgl/lvgl/commit/67b3011f835b08c77ff60ae2d1e6592a710ca2b1)
+- fix(msgbox): fix typo [`6a89bd2`](https://github.com/lvgl/lvgl/commit/6a89bd2d7409ac4d49ad32da73ba50a84f7c8990)
+- fix(tabview): remove the animation if the tab is selected by clicking the button on the header [`3de61c7`](https://github.com/lvgl/lvgl/commit/3de61c76af0aed1665e9d61e47b4dd50b9e8bdf1)
+- fix(btnmatrix): fix array out of bounds addressing with groups and no buttons [`edd5ad2`](https://github.com/lvgl/lvgl/commit/edd5ad28ad74d1025db0b442cfa390d8c01ae006)
+- fix(btnmatrix): fix using > 7 as button width [`75e6ef4`](https://github.com/lvgl/lvgl/commit/75e6ef4e1d66a85d68160b97ef931b0717e77212)
+- fix(draw): typo with LV_COLOR_DEPTH 8 [`45b13c3`](https://github.com/lvgl/lvgl/commit/45b13c378f6fc1728ddf1547c25daa61d62c9f76)
+- fix(disp): fix memory leak lv_scr_load_anim with auto_del and time=0 [`1caafc5`](https://github.com/lvgl/lvgl/commit/1caafc55dde46e1b7e3d17d8c5349fbf7cccba9f)
+
+- fix(msgbox): add missing lv_obj_class_init_obj [`6843c19`](https://github.com/lvgl/lvgl/commit/6843c191b792f66829477827279adbbc763541c1)
+- fix(flex): register LV_STYLE_FLEX_GROW [`5ba90a5`](https://github.com/lvgl/lvgl/commit/5ba90a5c41f584a8eb3a4fc8e2f466729652ddb3)
+
+### Examples
+
+- example(tabview): fix tabview disable scrollig example [`9491c3f`](https://github.com/lvgl/lvgl/commit/9491c3ff6d2f8e56b13d8fb493d4b3ee98ef1a4b)
+
+### Docs
+
+- docs: mention incompatibility between software rotation and `direct_mode` or `full_refresh` [`4308`](https://github.com/lvgl/lvgl/pull/4308)
+- docs(faq): don't say 24 bit is support as LVGL can't render in RGB888 directly [`227ac02`](https://github.com/lvgl/lvgl/commit/227ac023419eeb253892b1c36113059f12b1f9f2)
+
+### CI and tests
+
+### Others
+
+- chore(cmsis-pack): update cmsis-pack for v8.3.8 [`4340`](https://github.com/lvgl/lvgl/pull/4340)
+- add(docs): add renesas-ra6m3 get-started document [`4278`](https://github.com/lvgl/lvgl/pull/4278)
+- add(gpu): add renesas-ra6m3 gpu adaptation [`4270`](https://github.com/lvgl/lvgl/pull/4270)
+
+- Revert "fix:(BtnMatrix) Backport https://github.com/lvgl/lvgl/pull/4185" [`1713cd3`](https://github.com/lvgl/lvgl/commit/1713cd3fd8f93aa575fbcf0e34b8626b6ee69ded)
+
+
+
+
+## [v8.3.7](https://github.com/lvgl/lvgl/compare/v8.3.7...v8.3.6) 3 May 2023
+
+### New Features
+
+- feat(btnmatrix): review ctrl map and allow width values to be max 15 [`a150b15`](https://github.com/lvgl/lvgl/commit/a150b15e45a922eb5497fe5a31a480e1cd689246)
+
+### Fixes
+
+- fix (spinbox):  doubling characters entered from the keyboard [`4190`](https://github.com/lvgl/lvgl/pull/4190)
+- fix(arm-2d): fix transform-chrome-keying issue [`4178`](https://github.com/lvgl/lvgl/pull/4178)
+- fix(menu): prevent setting the current page again [`4136`](https://github.com/lvgl/lvgl/pull/4136)
+- fix(esp): fix ESP-IDF pedantic builds (backport v8.3) [`4135`](https://github.com/lvgl/lvgl/pull/4135)
+- fix: color mixing with LV_COLOR_SWAP == 1 [`4101`](https://github.com/lvgl/lvgl/pull/4101)
+
+- fix(indev): fix integer overflow in recursive zoom calculation [`a0795b4`](https://github.com/lvgl/lvgl/commit/a0795b49e82102ad68a27c86c36c37fffbe66d3c)
+- fix(style): fix trasition on bg_grad color [`48d7878`](https://github.com/lvgl/lvgl/commit/48d7878bac3f607322957ed6f710d6615d5e72e0)
+
+
 ## [v8.3.6](https://github.com/lvgl/lvgl/compare/v8.3.6...v8.3.5) 3 April 2023
 
 ### New Features

docs/_static/js/custom.js

@@ -12,7 +12,46 @@ document.addEventListener('DOMContentLoaded', (event) => {
             cppListing.classList.toggle("unexpanded");
             cppListing.classList.toggle("expanded");
         });
-        
+
         dt.insertBefore(button, dt.firstChild);
     });
-})
+
+    fetch('https://lvgl.io/home-banner.txt') // Replace with your URL
+  .then(response => {
+    // Check if the request was successful
+    if (!response.ok) {
+      throw new Error(`HTTP error! Status: ${response.status}`);
+    }
+    // Read the response as text
+    return response.text();
+  })
+  .then(data => {
+
+    const section = document.querySelector('.wy-nav-content-wrap');
+
+    //Add a div
+    const newDiv = document.createElement('div');
+    newDiv.style="background-image: linear-gradient(45deg, black, #5e5e5e); color: white; border-bottom: 4px solid #e10010; padding-inline:3em"
+    section.insertBefore(newDiv, section.firstChild);
+
+
+    //Add a p to the div
+    const newP = document.createElement('p');
+    newP.style="padding-block:12px; margin-block:0px;align-content: center;align-items: center;"
+    newP.innerHTML = data
+    newDiv.insertBefore(newP, newDiv.firstChild);
+
+    const children = newDiv.querySelectorAll('*');
+
+    // Iterate over each child
+    children.forEach(child => {
+        // Check if the child has an id
+        if (child.id) {
+            // Prepend 'docs-' to the id
+            child.id = 'docs-' + child.id;
+        }
+    })
+  }) .catch(error => {
+        console.error('Fetch error: ' + error.message);
+  });
+})

docs/get-started/platforms/index.md

@@ -9,6 +9,7 @@
    nxp
    stm32
    espressif
+   renesas
    arduino
    tasmota-berry
    cmake

docs/get-started/platforms/nxp.md

@@ -23,6 +23,7 @@ Supported draw callbacks are available in "src/draw/nxp/pxp/lv_draw_pxp.c":
     pxp_draw_ctx->base_draw.draw_img_decoded = lv_draw_pxp_img_decoded;
     pxp_draw_ctx->blend = lv_draw_pxp_blend;
     pxp_draw_ctx->base_draw.wait_for_finish = lv_draw_pxp_wait_for_finish;
+    pxp_draw_ctx->base_draw.buffer_copy = lv_draw_pxp_buffer_copy;
 ```
 
 #### Features supported:
@@ -35,6 +36,7 @@ Supported draw callbacks are available in "src/draw/nxp/pxp/lv_draw_pxp.c":
   - Color keying
   - Recoloring (color tint)
   - Image Rotation (90, 180, 270 degree)
+  - Buffer copy
   - RTOS integration layer
   - Default FreeRTOS and bare metal code provided
 
@@ -114,6 +116,7 @@ Supported draw callbacks are available in "src/draw/nxp/vglite/lv_draw_vglite.c"
     vglite_draw_ctx->base_draw.draw_img_decoded = lv_draw_vglite_img_decoded;
     vglite_draw_ctx->blend = lv_draw_vglite_blend;
     vglite_draw_ctx->base_draw.wait_for_finish = lv_draw_vglite_wait_for_finish;
+    vglite_draw_ctx->base_draw.buffer_copy = lv_draw_vglite_buffer_copy;
 ```
 
 #### Features supported:
@@ -129,6 +132,7 @@ Supported draw callbacks are available in "src/draw/nxp/vglite/lv_draw_vglite.c"
   - Draw rectangle border/outline with optional rounded corners
   - Draw arc with optional rounded ending
   - Draw line or dashed line with optional rounded ending
+  - Buffer copy
 
 #### Known limitations:
   - Source image alignment:

docs/get-started/platforms/pc-simulator.md

@@ -15,7 +15,7 @@ The simulator is ported to various IDEs (Integrated Development Environments). C
 
 - [Eclipse with SDL driver](https://github.com/lvgl/lv_sim_eclipse_sdl): Recommended on Linux and Mac
 - [CodeBlocks](https://github.com/lvgl/lv_sim_codeblocks_win): Recommended on Windows
-- [VisualStudio with SDL driver](https://github.com/lvgl/lv_sim_visual_studio_sdl): For Windows
+- [VisualStudio](https://github.com/lvgl/lv_sim_visual_studio_sdl): For Windows
 - [VSCode with SDL driver](https://github.com/lvgl/lv_sim_vscode_sdl): Recommended on Linux and Mac
 - [PlatformIO with SDL driver](https://github.com/lvgl/lv_platformio): Recommended on Linux and Mac
 - [MDK with FastModel](https://github.com/lvgl/lv_port_an547_cm55_sim): For Windows

docs/get-started/platforms/renesas.md

@@ -0,0 +1,129 @@
+# Renesas
+The [HMI-Board](https://bit.ly/3I9nfUo) development board SDK now comes with LVGL integration for quick evaluation. Simply download the [SDK](https://github.com/RT-Thread-Studio/sdk-bsp-ra6m3-hmi-board/tree/main/projects/hmi-board-lvgl) for the supported motherboard and you’ll be on your way to creating your next GUI application in no time. For more information, check out the [Software design description](https://github.com/RT-Thread-Studio/sdk-bsp-ra6m3-hmi-board/blob/main/projects/hmi-board-lvgl/README.md).
+
+## Creating new project with LVGL
+It is recommended to start your project by downloading the HMI-Board SDK example project. It comes fully equipped with LVGL and dave-2d support (if the modules are present), so you won’t need to do any additional integration work.
+
+## HW acceleration for Renesas RA6M3 platforms
+For RA6M3 platforms, hardware acceleration can be achieved using the dave-2d GPU, depending on the platform used. Each accelerator has its own context, allowing them to be used individually or simultaneously in LVGL’s multithreading mode.
+
+### Dave-2d accelerator
+LVGL can offload several drawing features to the dave-2d engine, freeing up the CPU for other operations while dave-2d runs. An RTOS is required to block the LVGL drawing thread and switch to another task or suspend the CPU for power savings. Supported draw callbacks can be found in “src/draw/renesas/lv_gpu_d2_ra6m3.c”.
+
+LVGL can offload several drawing features to the dave-2d engine, freeing up the CPU for other operations while dave-2d runs. An RTOS is required to block the LVGL drawing thread and switch to another task or suspend the CPU for power savings. Supported draw callbacks can be found in “src/draw/renesas/lv_gpu_d2_ra6m3.c”.
+
+```c
+	ra_2d_draw_ctx->blend = lv_draw_ra6m3_2d_blend;
+    ra_2d_draw_ctx->base_draw.draw_img_decoded = lv_port_gpu_img_decoded;
+    ra_2d_draw_ctx->base_draw.wait_for_finish = lv_port_gpu_wait;
+    ra_2d_draw_ctx->base_draw.draw_letter = lv_draw_gpu_letter;
+```
+
+### Features supported:
+    All operations can be used in conjunction with optional transparency.
+
+  - RGB565 and ARGB8888 color formats
+  - Area fill with color
+  - BLIT (BLock Image Transfer)
+  - Color conversion
+  - Rotate and scale
+  - Alpha blending
+  - Bilinear filtering
+  - RTOS integration layer
+  - Default RT-Thread code provided
+  - Subpixel exact placement
+
+### Basic configuration:
+  - Select Renesas dave-2d engine in lv_conf.h: Set `LV_USE_GPU_RA6M3_G2D` to 1
+  - Set referenced header file in lv_conf.h: `#define LV_GPU_RA6M3_G2D_INCLUDE "hal_data.h"`
+
+### RT-Thread Example:
+
+```c
+#define COLOR_BUFFER  (LV_HOR_RES_MAX * LV_VER_RES_MAX)
+
+static lv_disp_drv_t disp_drv;
+
+/*A static or global variable to store the buffers*/
+static lv_color_t buf_1[COLOR_BUFFER];
+```
+
+- After initializing your peripherals (such as SPI, GPIOs, and LCD) in the `lv_port_disp_init()` function, you can initialize LVGL using [`lv_init()`.](https://docs.lvgl.io/master/API/core/lv_obj.html#_CPPv47lv_initv) Next, register the frame buffers using `lv_disp_draw_buf_init()` and create a new display driver using `lv_disp_drv_init()`.
+
+```c
+/*Initialize `disp_buf` with the buffer(s). With only one buffer use NULL instead buf_2 */
+lv_disp_draw_buf_init(&disp_buf, buf_1, RT_NULL, COLOR_BUFFER);
+lv_disp_drv_init(&disp_drv); /*Basic initialization*/
+
+/*Set the resolution of the display*/
+disp_drv.hor_res = LV_HOR_RES_MAX;
+disp_drv.ver_res = LV_VER_RES_MAX;
+
+/*Set a display buffer*/
+disp_drv.draw_buf = &disp_buf;
+
+/*Used to copy the buffer's content to the display*/
+disp_drv.flush_cb = disp_flush;
+
+/* Initialize GPU module */
+lv_port_gpu_hw_init();
+
+/*Finally register the driver*/
+lv_disp_drv_register(&disp_drv);
+```
+
+* To run LVGL, you’ll need to create a thread. You can find examples of how to do this using RT-Thread in the `env_support/rt-thread/lv_rt_thread_port.c` file.
+
+```c
+static void lvgl_thread_entry(void *parameter)
+{
+#if LV_USE_LOG
+    lv_log_register_print_cb(lv_rt_log);
+#endif /* LV_USE_LOG */
+    lv_init();
+    lv_port_disp_init();
+    lv_port_indev_init();
+    lv_user_gui_init();
+
+    /* handle the tasks of LVGL */
+    while(1)
+    {
+        lv_task_handler();
+        rt_thread_mdelay(LV_DISP_DEF_REFR_PERIOD);
+    }
+}
+
+static int lvgl_thread_init(void)
+{
+    rt_err_t err;
+	
+    /* create lvgl thread */
+    err = rt_thread_init(&lvgl_thread, "LVGL", lvgl_thread_entry, RT_NULL,
+           &lvgl_thread_stack[0], sizeof(lvgl_thread_stack), PKG_LVGL_THREAD_PRIO, 10);
+    if(err != RT_EOK)
+    {
+        LOG_E("Failed to create LVGL thread");
+        return -1;
+    }
+    rt_thread_startup(&lvgl_thread);
+
+    return 0;
+}
+INIT_ENV_EXPORT(lvgl_thread_init);
+```
+
+- The last step is to create a function to output the frame buffer to your LCD. The specifics of this function will depend on the features of your MCU. Here’s an example for a typical MCU interface: `my_flush_cb`.
+
+```c
+static void my_flush_cb(lv_disp_drv_t *disp_drv, const lv_area_t *area, lv_color_t *color_p)
+{
+#ifdef PKG_USING_ILI9341
+    lcd_fill_array_spi(area->x1, area->y1, area->x2, area->y2, color_p);
+#elif LV_USE_GPU_RA6M3_G2D
+    lv_port_gpu_blit(area->x1, area->y1, color_p, area);
+#else
+    ......
+#endif
+    lv_disp_flush_ready(disp_drv);
+}
+```

docs/intro/index.md

@@ -132,7 +132,7 @@ LVGL needs just one simple driver function to copy an array of pixels into a giv
 If you can do this with your display then you can use it with LVGL.
 
 Some examples of the supported display types:
-- TFTs with 16 or 24 bit color depth
+- TFTs with 16 or 32 bit color depth
 - Monitors with an HDMI port
 - Small monochrome displays
 - Gray-scale displays

docs/libs/fsdrv.md

@@ -2,14 +2,38 @@
 # File System Interfaces
 
 LVGL has a [File system](https://docs.lvgl.io/master/overview/file-system.html) module to provide an abstraction layer for various file system drivers.
+You still need to provide the drivers and libraries, this extension provides only the bridge between FATFS, LittleFS, STDIO, POSIX, WIN32 and LVGL.
 
-LVG has built in support for:
-- [FATFS](http://elm-chan.org/fsw/ff/00index_e.html)
-- STDIO (Linux and Windows using C standard function .e.g fopen, fread)
-- POSIX (Linux and Windows using POSIX function .e.g open, read)
-- WIN32 (Windows using Win32 API function .e.g CreateFileA, ReadFile)
+## Built in wrappers
 
-You still need to provide the drivers and libraries, this extension provides only the bridge between FATFS, STDIO, POSIX, WIN32 and LVGL.
+### FATFS
+
+Bridge for [FatFS](http://elm-chan.org/fsw/ff/00index_e.html). FatFS itself is not part of LVGL, but can be added and initialized externally.
+
+
+### LittleFS
+
+Though `lv_fs_littlefs` uses [LittleFS]((https://github.com/littlefs-project/littlefs)) API, the LittleFS library needs other external libraries that handle the mounting of partitions and low-level accesses, according to the given architecture. The functions for the latter are given to the lfs_t structure as pointers by an external low-level library.
+
+There's a convenience function called `lv_fs_littlefs_set_driver(LV_FS_LITTLEFS_LETTER, my_lfs)`, specific to `lv_fs_littlefs`, to attach a `lfs_t` object's pointer to a registered driver-letter. See its comments for more info.
+
+
+[esp_littlefs](https://components.espressif.com/components/joltwallet/littlefs) is a wrapper for LittleFS to be used in Espressif ESP-devices. It handles the mounting and has the low-level `littlefs_api` functions to read/write/erase blocks that LittleFS library needs. On mounting by `esp_littlefs` the `lfs_t` structures are created. You need to get a handle to these to use ESP with `lv_fs_littlefs`, as all functions use that `lfs_t` in LittleFS to identify the mounted partition. 
+
+
+In case you don't find a special function in the `lv_fs_littlefs` wrapper, you can look for it in the `esp_littlefs` API and use it directly, as `lv_fs_littlefs` and the `esp_littlefs` APIs can be used side-by-side. 
+
+### STDIO
+
+Bride to C standard functions on Linux and Windows. For example `fopen`, `fread`, etc.
+
+### POSIX 
+
+Bride to POSIX functions on Linux and Windows. For example `open`, `read`, etc.
+
+### WIN32 
+
+Bride to Win32 API function. For example `CreateFileA`, `ReadFile`, etc.
 
 ## Usage
 

docs/libs/index.md

@@ -12,6 +12,7 @@
    png
    gif
    freetype
+   tiny_ttf
    qrcode
    rlottie
    ffmpeg

docs/libs/sjpg.md

@@ -12,7 +12,6 @@ Allow the use of JPG images in LVGL. Besides that it also allows the use of a cu
   - File read from file and c-array are implemented.
   - SJPEG frame fragment cache enables fast fetching of lines if available in cache.
   - By default the sjpg image cache will be image width * 2 * 16 bytes (can be modified)
-  - Currently only 16 bit image format is supported (TODO)
   - Only the required partion of the JPG and SJPG images are decoded, therefore they can't be zoomed or rotated.
 
 ## Usage

docs/libs/tiny_ttf.md

@@ -0,0 +1,35 @@
+# Tiny TTF font engine
+
+## Usage
+
+Use https://github.com/nothings/stb to render TrueType fonts in LVGL.
+
+When enabled in `lv_conf.h` with `LV_USE_TINY_TTF`
+`lv_tiny_ttf_create_data(data, data_size, font_size)` can be used to
+create a TTF font instance at the specified font size. You can then
+use that font anywhere `lv_font_t` is accepted.
+
+By default, the TTF or OTF file must be embedded as an array, either in
+a header, or loaded into RAM in order to function.
+
+However, if `LV_TINY_TTF_FILE_SUPPORT` is enabled,
+`lv_tiny_ttf_create_file(path, font_size)` will also be available,
+allowing tiny_ttf to stream from a file. The file must remain open the
+entire time the font is being used, and streaming on demand may be
+considerably slower.
+
+After a font is created, you can change the font size in pixels by using
+`lv_tiny_ttf_set_size(font, font_size)`.
+
+By default, a font will use up to 4KB of cache to speed up rendering
+glyphs. This maximum can be changed by using
+`lv_tiny_ttf_create_data_ex(data, data_size, font_size, cache_size)`
+or `lv_tiny_ttf_create_file_ex(path, font_size, cache_size)` (when
+available). The cache size is indicated in bytes.
+
+## API
+
+```eval_rst
+.. doxygenfile:: lv_tiny_ttf.h
+  :project: lvgl
+```

docs/others/snapshot.md

@@ -37,7 +37,7 @@ void update_snapshot(lv_obj_t * obj, lv_obj_t * img_snapshot)
 ```
 
 ### Use Existing Buffer
-If the snapshot needs update now and then, or simply caller provides memory, use API `lv_res_t lv_snapshot_take_to_buf(lv_obj_t * obj, lv_img_cf_t cf, lv_img_dsc_t * dsc, void * buf, uint32_t buff_size);` for this case. It's caller's responsibility to alloc/free the memory.
+If the snapshot needs update now and then, or simply caller provides memory, use API `lv_res_t lv_snapshot_take_to_buf(lv_obj_t * obj, lv_img_cf_t cf, lv_img_dsc_t * dsc, void * buf, uint32_t buf_size);` for this case. It's caller's responsibility to alloc/free the memory.
 
 
 If snapshot is generated successfully, the image descriptor is updated and image data will be stored to provided `buf`.

docs/overview/display.md

@@ -67,7 +67,7 @@ The Alpha channel of 32-bit colors will be 0 where there are no objects and 255
 
 In summary, to enable transparent screens and displays for OSD menu-like UIs:
 - Enable `LV_COLOR_SCREEN_TRANSP` in `lv_conf.h`
-- Set the screen's opacity to `LV_OPA_TRANSP` e.g. with `lv_obj_set_style_local_bg_opa(lv_scr_act(), LV_OBJMASK_PART_MAIN, LV_STATE_DEFAULT, LV_OPA_TRANSP)`
+- Set the screen's opacity to `LV_OPA_TRANSP` e.g. with `lv_obj_set_style_bg_opa(lv_scr_act(), LV_OPA_TRANSP, LV_PART_MAIN)`
 - Set the display opacity to `LV_OPA_TRANSP` with `lv_disp_set_bg_opa(NULL, LV_OPA_TRANSP);`
 
 ## Features of displays

docs/overview/font.md

@@ -99,11 +99,12 @@ This means it's enough to set the base direction of a screen and every object wi
 
 The default base direction for screens can be set by `LV_BIDI_BASE_DIR_DEF` in *lv_conf.h* and other objects inherit the base direction from their parent.
 
-To set an object's base direction use `lv_obj_set_base_dir(obj, base_dir)`.  The possible base directions are:
-- `LV_BIDI_DIR_LTR`: Left to Right base direction
-- `LV_BIDI_DIR_RTL`: Right to Left base direction
-- `LV_BIDI_DIR_AUTO`: Auto detect base direction
-- `LV_BIDI_DIR_INHERIT`: Inherit base direction from the parent (or a default value for non-screen objects)
+To set an object's base direction use `lv_obj_set_style_base_dir(obj, base_dir,selector)`.  The possible base directions are:
+- `LV_BASE_DIR_LTR`: Left to Right base direction
+- `LV_BASE_DIR_RTL`: Right to Left base direction
+- `LV_BASE_DIR_AUTO`: Auto detect base direction
+- `LV_BASE_DIR_NEUTRAL`
+- `LV_BASE_DIR_WEAK`
 
 This list summarizes the effect of RTL base direction on objects:
 - Create objects by default on the right
@@ -112,6 +113,7 @@ This list summarizes the effect of RTL base direction on objects:
 - `lv_btnmatrix`: Shows buttons from right to left
 - `lv_list`: Shows icons on the right
 - `lv_dropdown`: Aligns options to the right
+- `lv_bar`: Shows progress from right to left
 - The texts in `lv_table`, `lv_btnmatrix`, `lv_keyboard`, `lv_tabview`, `lv_dropdown`, `lv_roller` are "BiDi processed" to be displayed correctly
 
 ### Arabic and Persian support

docs/overview/object.md

@@ -173,7 +173,7 @@ All inputs are disabled during the screen animation.
 Screens are created on the currently selected *default display*.
 The *default display* is the last registered display with `lv_disp_drv_register`. You can also explicitly select a new default display using `lv_disp_set_default(disp)`.
 
-`lv_scr_act()`, `lv_scr_load()` and `lv_scr_load_anim()` operate on the default screen.
+`lv_scr_act()`, `lv_scr_load()` and `lv_scr_load_anim()` operate on the default display.
 
 Visit [Multi-display support](/overview/display) to learn more.
 

docs/overview/style-props.md

@@ -355,7 +355,7 @@ Set the opacity of the border. Value 0, `LV_OPA_0` or `LV_OPA_TRANSP` means full
 </ul>
 
 ### border_width
-Set hte width of the border. Only pixel values can be used.
+Set the width of the border. Only pixel values can be used.
 <ul>
 <li style='display:inline; margin-right: 20px; margin-left: 0px'><strong>Default</strong> 0</li>
 <li style='display:inline; margin-right: 20px; margin-left: 0px'><strong>Inherited</strong> No</li>
@@ -708,6 +708,15 @@ Scale down all opacity values of the object by this factor. Value 0, `LV_OPA_0`
 <li style='display:inline; margin-right: 20px; margin-left: 0px'><strong>Ext. draw</strong> No</li>
 </ul>
 
+### opa_layered
+First draw the object on the layer, then scale down layer opacity factor. Value 0, `LV_OPA_0` or `LV_OPA_TRANSP` means fully transparent, 255, `LV_OPA_100` or `LV_OPA_COVER` means fully covering, other values or LV_OPA_10, LV_OPA_20, etc means semi transparency.
+<ul>
+<li style='display:inline; margin-right: 20px; margin-left: 0px'><strong>Default</strong> `LV_OPA_COVER`</li>
+<li style='display:inline; margin-right: 20px; margin-left: 0px'><strong>Inherited</strong> Yes</li>
+<li style='display:inline; margin-right: 20px; margin-left: 0px'><strong>Layout</strong> No</li>
+<li style='display:inline; margin-right: 20px; margin-left: 0px'><strong>Ext. draw</strong> No</li>
+</ul>
+
 ### color_filter_dsc
 Mix a color to all colors of the object.
 <ul>
@@ -772,7 +781,7 @@ Describes how to blend the colors to the background. The possible values are `LV
 </ul>
 
 ### layout
-Set the layout if the object. The children will be repositioned and resized according to the policies set for the layout. For the possible values see the documentation of the layouts.
+Set the layout of the object. The children will be repositioned and resized according to the policies set for the layout. For the possible values see the documentation of the layouts.
 <ul>
 <li style='display:inline; margin-right: 20px; margin-left: 0px'><strong>Default</strong> 0</li>
 <li style='display:inline; margin-right: 20px; margin-left: 0px'><strong>Inherited</strong> No</li>

docs/porting/display.md

@@ -204,6 +204,10 @@ The default rotation of your display when it is initialized can be set using the
 
 Display rotation can also be changed at runtime using the `lv_disp_set_rotation(disp, rot)` API.
 
+If you enable rotation the coordinates of the pointer input devices (e.g. touchpad) will be rotated too.
+
+Note that when using software rotation, you cannot use neither `direct_mode` nor `full_refresh` in the driver. When using either of these, you will have to rotate the pixels yourself e.g. in the `flush_cb`.
+
 Support for software rotation is a new feature, so there may be some glitches/bugs depending on your configuration. If you encounter a problem please open an issue on [GitHub](https://github.com/lvgl/lvgl/issues).
 
 ### Decoupling the display refresh timer

docs/widgets/core/btnmatrix.md

@@ -25,7 +25,7 @@ So in the example the first row will have 2 buttons each with 50% width and a se
 The buttons' width can be set relative to the other button in the same row with `lv_btnmatrix_set_btn_width(btnm, btn_id, width)`
 E.g. in a line with two buttons: *btnA, width = 1* and *btnB, width = 2*, *btnA* will have 33 % width and *btnB* will have 66 % width.
 It's similar to how the [`flex-grow`](https://developer.mozilla.org/en-US/docs/Web/CSS/flex-grow) property works in CSS.
-The width must be in the \[1..7\] range and the default width is 1.
+The width must be in the \[1..15\] range and the default width is 1.
 
 In addition to the width, each button can be customized with the following parameters:
 - `LV_BTNMATRIX_CTRL_HIDDEN` Makes a button hidden (hidden buttons still take up space in the layout, they are just not visible or clickable)

docs/widgets/core/dropdown.md

@@ -43,7 +43,7 @@ Options are passed to the drop-down list as a string with `lv_dropdown_set_optio
 
 The `lv_dropdown_add_option(dropdown, "New option", pos)` function inserts a new option to `pos` index.
 
-To save memory the options can set from a static(constant) string too with `lv_dropdown_set_static_options(dropdown, options)`.
+To save memory the options can set from a static(constant) string too with `lv_dropdown_set_options_static(dropdown, options)`.
 In this case the options string should be alive while the drop-down list exists and `lv_dropdown_add_option` can't be used
 
 You can select an option manually with `lv_dropdown_set_selected(dropdown, id)`, where `id` is the index of an option.

docs/widgets/core/label.md

@@ -44,7 +44,9 @@ This is not the case with `lv_label_set_text_static`. The buffer you pass to `lv
 
 ### Text recolor
 In the text, you can use commands to recolor parts of the text. For example: `"Write a #ff0000 red# word"`.
-This feature can be enabled individually for each label by `lv_label_set_recolor()` function.
+This feature can be enabled individually for each label by `lv_label_set_recolor()` function,
+recoloring is only supported when the text wrapped with `##ff0000 ... #`sintax is in one line,
+it is not supported in wrapped text, see example `Line wrap, recoloring and scrolling`.
 
 ### Text selection
 If enabled by `LV_LABEL_TEXT_SELECTION` part of the text can be selected. It's similar to when you use your mouse on a PC to select a text.

docs/widgets/core/roller.md

@@ -18,6 +18,8 @@ Options are passed to the Roller as a string with `lv_roller_set_options(roller,
 
 You can select an option manually with `lv_roller_set_selected(roller, id, LV_ANIM_ON/OFF)`, where *id* is the index of an option.
 
+If the roller has a lot of options then especially in infinite mode the rendered options of the display might look scrambled. In this case `LV_USE_LARGE_COORD` should be enabled in `lv_conf.h`
+
 ### Get selected option
 To get the *index* of the currently selected option use `lv_roller_get_selected(roller)`.
 

docs/widgets/extra/calendar.md

@@ -1,5 +1,7 @@
 # Calendar (lv_calendar)
 
+**From v8.1 the header is added directly into the Calendar widget and the API of the headers has been changed.**
+
 ## Overview
 
 The Calendar object is a classic calendar which can:
@@ -13,13 +15,16 @@ The Calendar is added to the default group (if it is set). Calendar is an editab
 To make the Calendar flexible, by default it doesn't show the current year or month. Instead, there are optional "headers" that can be attached to the calendar.
 
 ## Parts and Styles
-The calendar object uses the [Button matrix](/widgets/core/btnmatrix) object under the hood to arrange the days into a matrix.
-- `LV_PART_MAIN` The background of the calendar. Uses all the background related style properties.
-- `LV_PART_ITEMS` Refers to the dates and day names. Button matrix control flags are set to differentiate the buttons and a custom drawer event is added modify the properties of the buttons as follows:
-   - day names have no border, no background and drawn with a gray color
-   - days of the previous and next month have `LV_BTNMATRIX_CTRL_DISABLED` flag
-   - today has a thicker border with the theme's primary color
-   - highlighted days have some opacity with the theme's primary color.
+The Calendar is composed of 3 widegets
+- Container: A rectangle which is a container for the *Header* and the *Days*. Uses only `LV_PART_MAIN` where all the background related style properties are working.
+- Days: It's a [Button matrix](/widgets/core/btnmatrix) object under the hood to arrange the days into a matrix. `lv_calendar_get_btnmatrix(calendar)` can be used to get it.
+    - `LV_PART_MAIN` The background of the calendar. Uses all the background related style properties.
+    - `LV_PART_ITEMS` Refers to the dates and day names. Button matrix control flags are set to differentiate the buttons and a custom drawer event is added modify the properties of the buttons as follows:
+       - day names have no border, no background and drawn with a gray color
+       - days of the previous and next month have `LV_BTNMATRIX_CTRL_DISABLED` flag
+       - today has a thicker border with the theme's primary color
+       - highlighted days have some opacity with the theme's primary color.
+- Header: Not created by default, the details are up to the given header.
 
 ## Usage
 
@@ -40,6 +45,13 @@ Only the array's pointer will be saved so the array should be a static or global
 The name of the days can be adjusted with `lv_calendar_set_day_names(calendar, day_names)` where `day_names` looks like `const char * day_names[7] = {"Su", "Mo", ...};`
 Only the pointer of the day names is saved so the elements should be static, global or constant variables.
 
+### Custom year list
+
+Sets a custom year list with `lv_calendar_header_dropdown_set_year_list(calendar, years_list)`
+where ``years_list`` is a pointer to the custom years list. It can be a constant string
+like ``static const char * years = "2023\n2022\n2021\n2020\n2019";``, 
+or can be generated dynamically into a buffer as well.
+
 ## Events
 - `LV_EVENT_VALUE_CHANGED` Sent if a date is clicked. `lv_calendar_get_pressed_date(calendar, &date)` set `date` to the date currently being pressed. Returns `LV_RES_OK` if there is a valid pressed date, else `LV_RES_INV`.
 
@@ -53,8 +65,6 @@ Learn more about [Keys](/overview/indev).
 
 ## Headers
 
-**From v8.1 the header is added directly into the Calendar widget and the API of the headers has been changed.**
-
 ### Arrow buttons
 
 `lv_calendar_header_arrow_create(calendar)` creates a header that contains a left and right arrow on the sides and a text with the current year and month between them.

docs/widgets/extra/meter.md

@@ -1,11 +1,11 @@
 # Meter (lv_meter)
 
 ## Overview
-The Meter widget can visualize data in very flexible ways. In can show arcs, needles, ticks lines and labels.
+The Meter widget can visualize data in very flexible ways. It can show arcs, needles, ticks lines and labels.
 
 ## Parts and Styles
 - `LV_PART_MAIN` The background of the Meter. Uses the typical background properties.
-- `LV_PART_TICK` The tick lines a labels using the *line* and *text* style properties.
+- `LV_PART_TICKS` The tick lines a labels using the *line* and *text* style properties.
 - `LV_PART_INDICATOR` The needle line or image using the *line* and *img* style properties, as well as the background properties to draw a square (or circle) on the pivot of the needles. Padding makes the square larger.
 - `LV_PART_ITEMS` The arcs using the *arc* properties.
 
@@ -18,7 +18,7 @@ The Scale has minor and major ticks and labels on the major ticks. Later indicat
 
 Any number of scales can be added to Meter.
 
-The minor tick lines can be configured with: `lv_meter_set_scale_ticks(meter, scale, tick_count, line_width, tick_length, ctick_olor)`.
+The minor tick lines can be configured with: `lv_meter_set_scale_ticks(meter, scale, tick_count, line_width, tick_length, tick_color)`.
 
 To add major tick lines use `lv_meter_set_scale_major_ticks(meter, scale, nth_major, tick_width, tick_length, tick_color, label_gap)`. `nth_major` to specify how many minor ticks to skip to draw a major tick.
 
@@ -46,7 +46,7 @@ All the indicator add functions return `lv_meter_indicator_t *`.
 `lv_meter_set_indicator_value(meter, inidicator, value)` sets the value of the indicator.
 
 #### Arc
-`indic = lv_meter_add_arc(meter, scale, arc_width, arc_color, r_mod)` adds and arc indicator. . By default, the radius of the arc is the same as the scale's radius but `r_mod` changes the radius.
+`indic = lv_meter_add_arc(meter, scale, arc_width, arc_color, r_mod)` adds an arc indicator. By default, the radius of the arc is the same as the scale's radius but `r_mod` changes the radius.
 
 `lv_meter_set_indicator_start_value(meter, indic, value)` and `lv_meter_set_indicator_end_value(meter, inidicator, value)` sets the value of the indicator.
 

docs/widgets/extra/span.md

@@ -37,7 +37,7 @@ like label object, the spangroup can be set to one the following modes:
 use function `lv_spangroup_set_align(spangroup, LV_TEXT_ALIGN_CENTER)` to set text align.
 
 ### Modes
-The spangroup can be set to one the following modes:
+The spangroup can be set to one of the following modes:
 - `LV_SPAN_MODE_FIXED` fixes the object size.
 - `LV_SPAN_MODE_EXPAND` Expand the object size to the text size but stay on a single line.
 - `LV_SPAN_MODE_BREAK` Keep width, break the too long lines and auto expand height.
@@ -45,14 +45,14 @@ The spangroup can be set to one the following modes:
 Use `lv_spangroup_set_mode(spangroup, LV_SPAN_MODE_BREAK)` to set object mode.
 
 ### Overflow
-The spangroup can be set to one the following modes:
+The spangroup can be set to one of the following modes:
 - `LV_SPAN_OVERFLOW_CLIP` truncates the text at the limit of the area.
 - `LV_SPAN_OVERFLOW_ELLIPSIS` will display an ellipsis(`...`) when text overflows the area.
 
 Use `lv_spangroup_set_overflow(spangroup, LV_SPAN_OVERFLOW_CLIP)` to set object overflow mode.
 
 ### first line indent
-Use `lv_spangroup_set_indent(spangroup, 20)` to set the indent of the first line. all modes support pixel units, in addition to LV_SPAN_MODE_FIXED and LV_SPAN_MODE_BREAK mode supports percentage units too.
+Use `lv_spangroup_set_indent(spangroup, 20)` to set the indent of the first line. All modes support pixel units, in addition to LV_SPAN_MODE_FIXED and LV_SPAN_MODE_BREAK mode supports percentage units too.
 
 ### lines
 Use `lv_spangroup_set_lines(spangroup, 10)` to set the maximum number of lines to be displayed in LV_SPAN_MODE_BREAK mode, negative values indicate no limit.

docs/widgets/extra/spinbox.md

@@ -38,7 +38,7 @@ Learn more about [Events](/overview/event).
 ## Keys
 - `LV_KEY_LEFT/RIGHT` With *Keypad* move the cursor left/right. With *Encoder* decrement/increment the selected digit.
 - `LV_KEY_UP/DOWN` With *Keypad* and *Encoder* increment/decrement the value.
-- `LV_KEY_ENTER` With *Encoder* got the net digit. Jump to the first after the last.
+- `LV_KEY_ENTER` With *Encoder* got the next digit. Jump to the first after the last.
 
 ## Example
 

docs/widgets/extra/spinner.md

@@ -13,7 +13,7 @@ The parts are identical to the parts of [lv_arc](/widgets/core/arc).
 To create a spinner use `lv_spinner_create(parent, spin_time, arc_length)`. `spin time` sets the spin time in milliseconds, `arc_length` sets the length of the spinning arc in degrees.
 
 ## Events
-No special events are sent to the Spinner.
+No special events are sent by the Spinner.
 
 See the events of the [Arc](/widgets/core/arc) too.
 

env_support/cmake/custom.cmake

@@ -63,6 +63,18 @@ install(
   FILES_MATCHING
   PATTERN "*.h")
 
+install(
+  FILES "${LV_CONF_PATH}"
+  DESTINATION "${CMAKE_INSTALL_PREFIX}/${INC_INSTALL_DIR}/../"
+  RENAME "lv_conf.h"
+  OPTIONAL)
+
+configure_file("${LVGL_ROOT_DIR}/lvgl.pc.in" lvgl.pc @ONLY)
+
+install(
+  FILES "${CMAKE_BINARY_DIR}/lvgl.pc"
+  DESTINATION "${LIB_INSTALL_DIR}/pkgconfig/")
+
 set_target_properties(
   lvgl
   PROPERTIES OUTPUT_NAME lvgl

env_support/cmake/esp.cmake

@@ -15,6 +15,7 @@ if(LV_MICROPYTHON)
 else()
   if(CONFIG_LV_BUILD_EXAMPLES)
     file(GLOB_RECURSE EXAMPLE_SOURCES ${LVGL_ROOT_DIR}/examples/*.c)
+    set_source_files_properties(${EXAMPLE_SOURCES} COMPILE_FLAGS "-Wno-unused-variable -Wno-format")
   endif()
 
   if(CONFIG_LV_USE_DEMO_WIDGETS)
@@ -36,6 +37,7 @@ else()
   if(CONFIG_LV_USE_DEMO_MUSIC)
     file(GLOB_RECURSE DEMO_MUSIC_SOURCES ${LVGL_ROOT_DIR}/demos/music/*.c)
     list(APPEND DEMO_SOURCES ${DEMO_MUSIC_SOURCES})
+    set_source_files_properties(${DEMO_MUSIC_SOURCES} COMPILE_FLAGS "-Wno-format")
   endif()
 
   idf_component_register(SRCS ${SOURCES} ${EXAMPLE_SOURCES} ${DEMO_SOURCES}

env_support/cmsis-pack/LVGL.lvgl.pdsc

@@ -20,7 +20,7 @@
 -->
 
 
-<package schemaVersion="1.4" xmlns:xs="http://www.w3.org/2001/XMLSchema-instance" xs:noNamespaceSchemaLocation="PACK.xsd">
+<package schemaVersion="1.4" xmlns:xs="http://www.w3.org/2001/XMLSchema-instance" xs:noNamespaceSchemaLocation="https://raw.githubusercontent.com/Open-CMSIS-Pack/Open-CMSIS-Pack-Spec/v1.7.7/schema/PACK.xsd">
   <vendor>LVGL</vendor>
   <name>lvgl</name>
   <description>LVGL (Light and Versatile Graphics Library) is a free and open-source graphics library providing everything you need to create an embedded GUI with easy-to-use graphical elements, beautiful visual effects and a low memory footprint.</description>
@@ -36,7 +36,37 @@
   <repository type="git">https://github.com/lvgl/lvgl.git</repository>
 
   <releases>
-    <release date="2023-04-02" version="8.3.6" url="https://raw.githubusercontent.com/lvgl/lvgl/master/env_support/cmsis-pack/LVGL.lvgl.8.3.6.pack">
+    <release date="2024-03-19" version="8.4.0" url="https://github.com/lvgl/lvgl/raw/v8.4.0/env_support/cmsis-pack/LVGL.lvgl.8.4.0.pack">
+      - LVGL 8.4.0
+      - Some minor fixes
+    </release>
+    <release date="2023-12-05" version="8.3.11" url="https://github.com/lvgl/lvgl/raw/v8.3.11/env_support/cmsis-pack/LVGL.lvgl.8.3.11.pack">
+      - LVGL 8.3.11
+      - Add LittleFS Library to LVGL8
+      - Backport Tiny TTF to LVGL8
+      - Some minor fixes
+    </release>
+    <release date="2023-09-19" version="8.3.10" url="https://github.com/lvgl/lvgl/raw/9e388055ec0bcad5179461e66d6dac6823129eee/env_support/cmsis-pack/LVGL.lvgl.8.3.10.pack">
+      - LVGL 8.3.10
+      - Some minor fixes
+    </release>
+    
+    <release date="2023-08-04" version="8.3.9" url="https://github.com/lvgl/lvgl/raw/bdf5bfb88ce107f16cf9128cf75e61394b3219d0/env_support/cmsis-pack/LVGL.lvgl.8.3.9.pack">
+      - LVGL 8.3.10
+      - Add snapshot, fragment, imgfont, gridnav, msg and monkey
+      - Other minor fixes
+    </release>
+    <release date="2023-07-04" version="8.3.8" url="https://github.com/lvgl/lvgl/raw/15433d69b9d8ae6aa74f49946874af81a0cc5921/env_support/cmsis-pack/LVGL.lvgl.8.3.8.pack">
+      - LVGL 8.3.8
+      - Add renesas-ra6m3 gpu adaptation
+      - Improve performance and add more features for PXP and VGLite
+      - Minor updates
+    </release>
+    <release date="2023-04-28" version="8.3.7" url="https://github.com/lvgl/lvgl/raw/2b56e04205481daa6575bd5f7ab5df59d11676eb/env_support/cmsis-pack/LVGL.lvgl.8.3.7.pack">
+      - LVGL 8.3.7
+      - Minor updates
+    </release>
+    <release date="2023-04-02" version="8.3.6" url="https://github.com/lvgl/lvgl/raw/6b0092c0d91b2c7bfded48e04cc7b486ed3a72bd/env_support/cmsis-pack/LVGL.lvgl.8.3.6.pack">
       - LVGL 8.3.6 release
       - Various fixes, See CHANGELOG.md
     </release>
@@ -177,6 +207,7 @@
             <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-PXP"/>
             <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-VGLite"/>
             <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU GD32-IPA"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="LVGL-GPU-RA6M3-G2D"/>
         </condition>
         
         <condition id="LVGL-GPU-STM32-DMA2D">
@@ -188,6 +219,7 @@
             <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-PXP"/>
             <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-VGLite"/>
             <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU GD32-IPA"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="LVGL-GPU-RA6M3-G2D"/>
         </condition>
         
         <condition id="LVGL-GPU-SWM341-DMA2D">
@@ -199,6 +231,7 @@
             <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-PXP"/>
             <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-VGLite"/>
             <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU GD32-IPA"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="LVGL-GPU-RA6M3-G2D"/>
         </condition>
         
         <condition id="LVGL-GPU-NXP-PXP">
@@ -210,6 +243,7 @@
             <!--<deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-PXP"/>-->
             <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-VGLite"/>
             <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU GD32-IPA"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="LVGL-GPU-RA6M3-G2D"/>
         </condition>
         
         <condition id="LVGL-GPU-NXP-VGLite">
@@ -221,6 +255,7 @@
             <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-PXP"/>
             <!--<deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-VGLite"/>-->
             <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU GD32-IPA"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="LVGL-GPU-RA6M3-G2D"/>
         </condition>
         
         <condition id="LVGL-GPU-GD32-IPA">
@@ -232,6 +267,19 @@
             <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-PXP"/>
             <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-VGLite"/>
             <!--<deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU GD32-IPA"/>-->
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="LVGL-GPU-RA6M3-G2D"/>
+        </condition>
+
+        <condition id="LVGL-GPU-RA6M3-G2D">
+            <description>Enable LVGL Arm-2D GPU Support</description>
+            <require Cclass="LVGL" Cgroup="lvgl" Csub="Essential"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU Arm-2D"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU STM32-DMA2D"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU SWM341-DMA2D"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-PXP"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU NXP-VGLite"/>
+            <deny Cclass="LVGL" Cgroup="lvgl" Csub="GPU GD32-IPA"/>
+            <!--<deny Cclass="LVGL" Cgroup="lvgl" Csub="LVGL-GPU-RA6M3-G2D"/>-->
         </condition>
 
     </conditions>
@@ -266,7 +314,7 @@
   -->
 
     <components>
-        <bundle Cbundle="LVGL" Cclass="LVGL" Cversion="8.3.6">
+        <bundle Cbundle="LVGL" Cclass="LVGL" Cversion="8.4.0">
             <description>LVGL (Light and Versatile Graphics Library) is a free and open-source graphics library providing everything you need to create an embedded GUI with easy-to-use graphical elements, beautiful visual effects and a low memory footprint.</description>
             <doc></doc>
             <component Cgroup="lvgl" Csub="Essential" >
@@ -399,7 +447,7 @@
                 <file category="sourceC"            name="src/widgets/lv_textarea.c" />
 
                 <!-- general -->
-                <file category="preIncludeGlobal"   name="lv_conf_cmsis.h" attr="config" version="1.0.3" />
+                <file category="preIncludeGlobal"   name="lv_conf_cmsis.h" attr="config" version="1.0.5" />
                 <file category="sourceC"            name="lv_cmsis_pack.c" attr="config" version="1.0.0" />
                 <file category="header"             name="lvgl.h" />
                 <file category="doc"                name="README.md"/>
@@ -443,7 +491,7 @@
               </files>
             </component>
 
-            <component Cgroup="lvgl" Csub="GPU Arm-2D"  condition="LVGL-GPU-Arm-2D" Cversion="1.2.0">
+            <component Cgroup="lvgl" Csub="GPU Arm-2D"  condition="LVGL-GPU-Arm-2D" Cversion="1.2.2">
               <description>A 2D image processing library from Arm (i.e. Arm-2D) for All Cortex-M processors including Cortex-M0</description>
               <files>
               <file category="sourceC"      name="src/draw/arm2d/lv_gpu_arm2d.c" condition="Arm-2D"/>
@@ -523,6 +571,22 @@
 
             </component>
 
+
+            <component Cgroup="lvgl" Csub="GPU RA6M3-G2D"  condition="LVGL-GPU-RA6M3-G2D">
+              <description>An hardware acceleration from Renesas RA6M3-G2D</description>
+              <files>
+                <file category="sourceC"            name="src/draw/renesas/lv_gpu_d2_draw_label.c" />
+                <file category="sourceC"            name="src/draw/renesas/lv_gpu_d2_ra6m3.c" />
+              </files>
+              
+              <RTE_Components_h>
+              
+/*! \brief enable RA6M3-G2D */
+#define LV_USE_GPU_RA6M3_G2D      1
+              </RTE_Components_h>
+              
+            </component>
+
             <component Cgroup="lvgl" Csub="Extra Themes"  condition="LVGL-Essential">
               <description>Extra Themes, Widgets and Layouts</description>
               <files>
@@ -668,9 +732,26 @@
                 <file category="sourceC"            name="src/extra/libs/fsdrv/lv_fs_fatfs.c" />
                 <file category="sourceC"            name="src/extra/libs/fsdrv/lv_fs_posix.c" />
                 <file category="sourceC"            name="src/extra/libs/fsdrv/lv_fs_stdio.c" />
+                <file category="sourceC"            name="src/extra/libs/fsdrv/lv_fs_littlefs.c" />
               </files>
 
             </component>
+            
+            <component Cgroup="lvgl" Csub="Libs Tiny TTF"  condition="LVGL-Essential">
+              <description>Add Tiny TTF Library</description>
+              <files>
+                <!-- src/extra/libs/tiny_ttf -->
+                <file category="sourceC"            name="src/extra/libs/tiny_ttf/lv_tiny_ttf.c" />
+              </files>
+              
+              <RTE_Components_h>
+
+/*! \brief enable Tiny TTF Library */
+#define LV_USE_TINY_TTF         1
+              </RTE_Components_h>
+              
+            </component>
+
 
             <component Cgroup="lvgl" Csub="Libs RLOTTIE"  condition="LVGL-Essential">
               <description>Add RLOTTIE support, an extra librbary is required.</description>
@@ -682,7 +763,7 @@
               <RTE_Components_h>
 
 /*! \brief enable RLOTTIE support */
-#define LV_USE_RLOTTIE         1
+#define LV_USE_RLOTTIE          1
               </RTE_Components_h>
 
             </component>
@@ -697,7 +778,7 @@
               <RTE_Components_h>
 
 /*! \brief enable ffmpeg support */
-#define LV_USE_FFMPEG         1
+#define LV_USE_FFMPEG           1
               </RTE_Components_h>
 
             </component>
@@ -712,7 +793,98 @@
               <RTE_Components_h>
 
 /*! \brief enable ffmpeg support */
-#define LV_USE_IME_PINYIN         1
+#define LV_USE_IME_PINYIN       1
+              </RTE_Components_h>
+
+            </component>
+
+            <component Cgroup="lvgl" Csub="Snapshot"  condition="LVGL-Essential">
+              <description>Add the Snapshot service</description>
+              <files>
+                <!-- src/extra/others/snapshot -->
+                <file category="sourceC"            name="src/extra/others/snapshot/lv_snapshot.c" />
+              </files>
+
+              <RTE_Components_h>
+
+/*! \brief enable snapshot support */
+#define LV_USE_SNAPSHOT         1
+              </RTE_Components_h>
+
+            </component>
+
+            <component Cgroup="lvgl" Csub="Fragment"  condition="LVGL-Essential">
+              <description>Add the Fragment service</description>
+              <files>
+                <!-- src/extra/others/fragment -->
+                <file category="sourceC"            name="src/extra/others/fragment/lv_fragment.c" />
+                <file category="sourceC"            name="src/extra/others/fragment/lv_fragment_manager.c" />
+              </files>
+
+              <RTE_Components_h>
+
+/*! \brief enable fragment support */
+#define LV_USE_FRAGMENT         1
+              </RTE_Components_h>
+
+            </component>
+
+            <component Cgroup="lvgl" Csub="Grid Navigation"  condition="LVGL-Essential">
+              <description>Add the Grid Navigation service</description>
+              <files>
+                <!-- src/extra/others/gridnav -->
+                <file category="sourceC"            name="src/extra/others/gridnav/lv_gridnav.c" />
+              </files>
+
+              <RTE_Components_h>
+
+/*! \brief enable the Grid Navigation support*/
+#define LV_USE_GRIDNAV          1
+              </RTE_Components_h>
+
+            </component>
+
+            <component Cgroup="lvgl" Csub="Image Font"  condition="LVGL-Essential">
+              <description>Add the Image Font service</description>
+              <files>
+                <!-- src/extra/others/imgfont -->
+                <file category="sourceC"            name="src/extra/others/imgfont/lv_imgfont.c" />
+              </files>
+
+              <RTE_Components_h>
+
+/*! \brief enable the image font support*/
+#define LV_USE_IMGFONT          1
+              </RTE_Components_h>
+
+            </component>
+
+            <component Cgroup="lvgl" Csub="Monkey"  condition="LVGL-Essential">
+              <description>Add the Monkey service</description>
+              <files>
+                <!-- src/extra/others/monkey -->
+                <file category="sourceC"            name="src/extra/others/monkey/lv_monkey.c" />
+              </files>
+
+              <RTE_Components_h>
+
+/*! \brief enable the monkey service support*/
+#define LV_USE_MONKEY           1
+              </RTE_Components_h>
+
+            </component>
+
+            <component Cgroup="lvgl" Csub="Message"  condition="LVGL-Essential">
+              <description>Add the Message service</description>
+              <files>
+                <!-- src/extra/others/msg -->
+                <file category="sourceC"            name="src/extra/others/msg/lv_msg.c" />
+              </files>
+
+              <RTE_Components_h>
+
+/*! \brief enable the message service support*/
+#define LV_USE_MSG              1
               </RTE_Components_h>
 
             </component>
@@ -741,7 +913,7 @@
               <RTE_Components_h>
 
 /*! \brief enable demo:bencharmk */
-#define LV_USE_DEMO_BENCHMARK         1
+#define LV_USE_DEMO_BENCHMARK    1
               </RTE_Components_h>
 
             </component>
@@ -761,7 +933,7 @@
               <RTE_Components_h>
 
 /*! \brief enable demo:widgets support */
-#define LV_USE_DEMO_WIDGETS         1
+#define LV_USE_DEMO_WIDGETS     1
               </RTE_Components_h>
 
             </component>

env_support/cmsis-pack/LVGL.pidx

@@ -2,8 +2,8 @@
 <index schemaVersion="1.0.0" xs:noNamespaceSchemaLocation="PackIndex.xsd" xmlns:xs="http://www.w3.org/2001/XMLSchema-instance">
   <vendor>LVGL</vendor>
   <url>https://raw.githubusercontent.com/lvgl/lvgl/master/env_support/cmsis-pack/</url>
-  <timestamp>2023-02-06T12:22:00</timestamp>
+  <timestamp>2024-3-19</timestamp>
   <pindex>
-    <pdsc url="https://raw.githubusercontent.com/lvgl/lvgl/release/v8.3/env_support/cmsis-pack/" vendor="LVGL" name="lvgl" version="8.3.6"/>
+    <pdsc url="https://raw.githubusercontent.com/lvgl/lvgl/release/v8.3/env_support/cmsis-pack/" vendor="LVGL" name="lvgl" version="8.4.0"/>
   </pindex>
 </index>

env_support/cmsis-pack/README.md

@@ -35,7 +35,9 @@ remove the misleading guide above this code segment.
 #define LV_CONF_H
 
 #include <stdint.h>
-#include "RTE_Components.h"
+#if defined(_RTE_)
+    #include "RTE_Components.h"
+#endif
 ...
 ```
 
@@ -46,12 +48,33 @@ remove the misleading guide above this code segment.
    - LV_USE_GPU_SWM341_DMA2D
    - LV_USE_GPU_ARM2D
    - LV_USE_IME_PINYIN
+   - LV_USE_PNG
+   - LV_USE_BMP
+   - LV_USE_SJPG
+   - LV_USE_GIF
+   - LV_USE_QRCODE
+   - LV_USE_FREETYPE
+   - LV_USE_TINY_TTF
+   - LV_USE_RLOTTIE
+   - LV_USE_FFMPEG
+   - LV_USE_SNAPSHOT
+   - LV_USE_MONKEY
+   - LV_USE_GRIDNAV
+   - LV_USE_FRAGMENT
+   - LV_USE_IMGFONT
+   - LV_USE_MSG
+   - LV_USE_IME_PINYIN
 5. Update macro `LV_ATTRIBUTE_MEM_ALIGN` and `LV_ATTRIBUTE_MEM_ALIGN_SIZE`  to force a WORD alignment.
 ```c
 #define LV_ATTRIBUTE_MEM_ALIGN_SIZE     4
 #define LV_ATTRIBUTE_MEM_ALIGN          __attribute__((aligned(4)))
 ```
 Update macro `LV_MEM_SIZE` to `(64*1024U)`.
+
+Update macro `LV_FONT_MONTSERRAT_12` to `1`.
+
+Update macro `LV_FONT_MONTSERRAT_12` to `1`.
+
 6. Update Theme related macros:
 
 ```c
@@ -89,25 +112,41 @@ Update macro `LV_MEM_SIZE` to `(64*1024U)`.
     #define LV_TICK_CUSTOM 1
     #if LV_TICK_CUSTOM
         extern uint32_t SystemCoreClock;
-        #define LV_TICK_CUSTOM_INCLUDE             "perf_counter.h"
-
-        #if __PER_COUNTER_VER__ < 10902ul
-            #define LV_TICK_CUSTOM_SYS_TIME_EXPR    ((uint32_t)get_system_ticks() / (SystemCoreClock / 1000ul))
-        #else
-            #define LV_TICK_CUSTOM_SYS_TIME_EXPR    get_system_ms()
-        #endif
+        #define LV_TICK_CUSTOM_INCLUDE          "perf_counter.h"
+        #define LV_TICK_CUSTOM_SYS_TIME_EXPR    get_system_ms()
     #endif   /*LV_TICK_CUSTOM*/
 #else
     #define LV_TICK_CUSTOM 0
     #if LV_TICK_CUSTOM
         #define LV_TICK_CUSTOM_INCLUDE "Arduino.h"         /*Header for the system time function*/
         #define LV_TICK_CUSTOM_SYS_TIME_EXPR (millis())    /*Expression evaluating to current system time in ms*/
+    /*If using lvgl as ESP32 component*/
+    // #define LV_TICK_CUSTOM_INCLUDE "esp_timer.h"
+    // #define LV_TICK_CUSTOM_SYS_TIME_EXPR ((esp_timer_get_time() / 1000LL))
     #endif   /*LV_TICK_CUSTOM*/
 #endif       /*__PERF_COUNTER__*/
 ```
-9. Thoroughly remove the `DEMO USAGE` section.
-10. Thoroughly remove the '3rd party libraries' section.
-10. rename '**lv_conf_template.h**' to '**lv_conf_cmsis.h**'.
+
+
+9. Remove all content in `DEMO USAGE` section but keep the following:
+
+```c
+/*Show some widget. It might be required to increase `LV_MEM_SIZE` */
+#if LV_USE_DEMO_WIDGETS
+	#define LV_DEMO_WIDGETS_SLIDESHOW 0
+#endif
+
+/*Benchmark your system*/
+#if LV_USE_DEMO_BENCHMARK
+/*Use RGB565A8 images with 16 bit color depth instead of ARGB8565*/
+	#define LV_DEMO_BENCHMARK_RGB565A8 1
+#endif
+```
+
+
+
+10. Thoroughly remove the `3rd party libraries` section.
+11. rename '**lv_conf_template.h**' to '**lv_conf_cmsis.h**'.
 
 
 

env_support/cmsis-pack/lv_conf_cmsis.h

@@ -1,6 +1,6 @@
 /**
  * @file lv_conf.h
- * Configuration file for v8.3.6
+ * Configuration file for v8.4.0
  */
 
 /* clang-format off */
@@ -10,7 +10,10 @@
 #define LV_CONF_H
 
 #include <stdint.h>
-#include "RTE_Components.h"
+
+#if defined(_RTE_)
+    #include "RTE_Components.h"
+#endif
 
 /*====================
    COLOR SETTINGS
@@ -76,6 +79,7 @@
 /*Input device read period in milliseconds*/
 #define LV_INDEV_DEF_READ_PERIOD 30     /*[ms]*/
 
+
 /*Use a custom tick source that tells the elapsed time in milliseconds.
  *It removes the need to manually update the tick with `lv_tick_inc()`)*/
 #ifdef __PERF_COUNTER__
@@ -90,12 +94,13 @@
     #if LV_TICK_CUSTOM
         #define LV_TICK_CUSTOM_INCLUDE "Arduino.h"         /*Header for the system time function*/
         #define LV_TICK_CUSTOM_SYS_TIME_EXPR (millis())    /*Expression evaluating to current system time in ms*/
-        /*If using lvgl as ESP32 component*/
-        // #define LV_TICK_CUSTOM_INCLUDE "esp_timer.h"
-        // #define LV_TICK_CUSTOM_SYS_TIME_EXPR ((esp_timer_get_time() / 1000LL))
+    /*If using lvgl as ESP32 component*/
+    // #define LV_TICK_CUSTOM_INCLUDE "esp_timer.h"
+    // #define LV_TICK_CUSTOM_SYS_TIME_EXPR ((esp_timer_get_time() / 1000LL))
     #endif   /*LV_TICK_CUSTOM*/
 #endif       /*__PERF_COUNTER__*/
 
+
 /*Default Dot Per Inch. Used to initialize default sizes such as widgets sized, style paddings.
  *(Not so important, you can adjust it to modify default sizes and spaces)*/
 #define LV_DPI_DEF 130     /*[px/inch]*/
@@ -178,6 +183,7 @@
  * GPU
  *-----------*/
 
+
 /*Use STM32's DMA2D (aka Chrom Art) GPU*/
 #if LV_USE_GPU_STM32_DMA2D
     /*Must be defined to include path of CMSIS header of target processor
@@ -185,6 +191,13 @@
     #define LV_GPU_DMA2D_CMSIS_INCLUDE
 #endif
 
+/*Enable RA6M3 G2D GPU*/
+#if LV_USE_GPU_RA6M3_G2D
+    /*include path of target processor
+    e.g. "hal_data.h"*/
+    #define LV_GPU_RA6M3_G2D_INCLUDE "hal_data.h"
+#endif
+
 /*Use SWM341's DMA2D GPU*/
 #if LV_USE_GPU_SWM341_DMA2D
     #define LV_GPU_SWM341_DMA2D_INCLUDE "SWM341.h"
@@ -200,16 +213,6 @@
     #define LV_USE_GPU_NXP_PXP_AUTO_INIT 0
 #endif
 
-/*Use SDL renderer API*/
-#define LV_USE_GPU_SDL 0
-#if LV_USE_GPU_SDL
-    #define LV_GPU_SDL_INCLUDE_PATH <SDL2/SDL.h>
-    /*Texture cache size, 8MB by default*/
-    #define LV_GPU_SDL_LRU_SIZE (1024 * 1024 * 8)
-    /*Custom blend mode for mask drawing, disable if you need to link with older SDL2 lib*/
-    #define LV_GPU_SDL_CUSTOM_BLEND_MODE (SDL_VERSION_ATLEAST(2, 0, 6))
-#endif
-
 /*-------------
  * Logging
  *-----------*/
@@ -225,11 +228,11 @@
     *LV_LOG_LEVEL_ERROR       Only critical issue, when the system may fail
     *LV_LOG_LEVEL_USER        Only logs added by the user
     *LV_LOG_LEVEL_NONE        Do not log anything*/
-    #define LV_LOG_LEVEL LV_LOG_LEVEL_USER
+    #define LV_LOG_LEVEL LV_LOG_LEVEL_WARN
 
     /*1: Print the log with 'printf';
     *0: User need to register a callback with `lv_log_register_print_cb()`*/
-    #define LV_LOG_PRINTF 1
+    #define LV_LOG_PRINTF 0
 
     /*Enable/disable LV_LOG_TRACE in modules that produces a huge number of logs*/
     #define LV_LOG_TRACE_MEM        1
@@ -582,7 +585,6 @@
     #define LV_USE_THEME_BASIC      0
     #define LV_USE_THEME_MONO       0
 #endif
-
 /*-----------
  * Layouts
  *----------*/
@@ -593,28 +595,86 @@
 /*A layout similar to Grid in CSS.*/
 #define LV_USE_GRID 1
 
+/*---------------------
+ * 3rd party libraries
+ *--------------------*/
+
+/*File system interfaces for common APIs */
+
+/*API for fopen, fread, etc*/
+#define LV_USE_FS_STDIO 0
+#if LV_USE_FS_STDIO
+    #define LV_FS_STDIO_LETTER '\0'     /*Set an upper cased letter on which the drive will accessible (e.g. 'A')*/
+    #define LV_FS_STDIO_PATH ""         /*Set the working directory. File/directory paths will be appended to it.*/
+    #define LV_FS_STDIO_CACHE_SIZE 0    /*>0 to cache this number of bytes in lv_fs_read()*/
+#endif
+
+/*API for open, read, etc*/
+#define LV_USE_FS_POSIX 0
+#if LV_USE_FS_POSIX
+    #define LV_FS_POSIX_LETTER '\0'     /*Set an upper cased letter on which the drive will accessible (e.g. 'A')*/
+    #define LV_FS_POSIX_PATH ""         /*Set the working directory. File/directory paths will be appended to it.*/
+    #define LV_FS_POSIX_CACHE_SIZE 0    /*>0 to cache this number of bytes in lv_fs_read()*/
+#endif
+
+/*API for CreateFile, ReadFile, etc*/
+#define LV_USE_FS_WIN32 0
+#if LV_USE_FS_WIN32
+    #define LV_FS_WIN32_LETTER '\0'     /*Set an upper cased letter on which the drive will accessible (e.g. 'A')*/
+    #define LV_FS_WIN32_PATH ""         /*Set the working directory. File/directory paths will be appended to it.*/
+    #define LV_FS_WIN32_CACHE_SIZE 0    /*>0 to cache this number of bytes in lv_fs_read()*/
+#endif
+
+/*API for FATFS (needs to be added separately). Uses f_open, f_read, etc*/
+#define LV_USE_FS_FATFS 0
+#if LV_USE_FS_FATFS
+    #define LV_FS_FATFS_LETTER '\0'     /*Set an upper cased letter on which the drive will accessible (e.g. 'A')*/
+    #define LV_FS_FATFS_CACHE_SIZE 0    /*>0 to cache this number of bytes in lv_fs_read()*/
+#endif
+
+/*API for LittleFS (library needs to be added separately). Uses lfs_file_open, lfs_file_read, etc*/
+#define LV_USE_FS_LITTLEFS 0
+#if LV_USE_FS_LITTLEFS
+    #define LV_FS_LITTLEFS_LETTER '\0'     /*Set an upper cased letter on which the drive will accessible (e.g. 'A')*/
+    #define LV_FS_LITTLEFS_CACHE_SIZE 0    /*>0 to cache this number of bytes in lv_fs_read()*/
+#endif
+
+
+
+/*FreeType library*/
+#if LV_USE_FREETYPE
+    /*Memory used by FreeType to cache characters [bytes] (-1: no caching)*/
+    #define LV_FREETYPE_CACHE_SIZE (16 * 1024)
+    #if LV_FREETYPE_CACHE_SIZE >= 0
+        /* 1: bitmap cache use the sbit cache, 0:bitmap cache use the image cache. */
+        /* sbit cache:it is much more memory efficient for small bitmaps(font size < 256) */
+        /* if font size >= 256, must be configured as image cache */
+        #define LV_FREETYPE_SBIT_CACHE 0
+        /* Maximum number of opened FT_Face/FT_Size objects managed by this cache instance. */
+        /* (0:use system defaults) */
+        #define LV_FREETYPE_CACHE_FT_FACES 0
+        #define LV_FREETYPE_CACHE_FT_SIZES 0
+    #endif
+#endif
+
+/*Tiny TTF library*/
+#if LV_USE_TINY_TTF
+    /*Load TTF data from files*/
+    #define LV_TINY_TTF_FILE_SUPPORT 0
+#endif
+
+
+/*FFmpeg library for image decoding and playing videos
+ *Supports all major image formats so do not enable other image decoder with it*/
+#if LV_USE_FFMPEG
+    /*Dump input information to stderr*/
+    #define LV_FFMPEG_DUMP_FORMAT 0
+#endif
+
 /*-----------
  * Others
  *----------*/
 
-/*1: Enable API to take snapshot for object*/
-#define LV_USE_SNAPSHOT 0
-
-/*1: Enable Monkey test*/
-#define LV_USE_MONKEY 0
-
-/*1: Enable grid navigation*/
-#define LV_USE_GRIDNAV 0
-
-/*1: Enable lv_obj fragment*/
-#define LV_USE_FRAGMENT 0
-
-/*1: Support using images as font in label or span widgets */
-#define LV_USE_IMGFONT 0
-
-/*1: Enable a published subscriber based messaging system */
-#define LV_USE_MSG 0
-
 /*1: Enable Pinyin input method*/
 /*Requires: lv_keyboard*/
 #if LV_USE_IME_PINYIN
@@ -639,6 +699,20 @@
 /*Enable the examples to be built with the library*/
 #define LV_BUILD_EXAMPLES 1
 
+/*===================
+ * DEMO USAGE
+ ====================*/
+
+/*Show some widget. It might be required to increase `LV_MEM_SIZE` */
+#if LV_USE_DEMO_WIDGETS
+    #define LV_DEMO_WIDGETS_SLIDESHOW 0
+#endif
+
+/*Benchmark your system*/
+#if LV_USE_DEMO_BENCHMARK
+/*Use RGB565A8 images with 16 bit color depth instead of ARGB8565*/
+    #define LV_DEMO_BENCHMARK_RGB565A8 1
+#endif
 
 /*--END OF LV_CONF_H--*/
 

env_support/rt-thread/lv_rt_thread_port.c

@@ -69,7 +69,7 @@ static int lvgl_thread_init(void)
     rt_err_t err;
 
     err = rt_thread_init(&lvgl_thread, "LVGL", lvgl_thread_entry, RT_NULL,
-           &lvgl_thread_stack[0], sizeof(lvgl_thread_stack), PKG_LVGL_THREAD_PRIO, 0);
+           &lvgl_thread_stack[0], sizeof(lvgl_thread_stack), PKG_LVGL_THREAD_PRIO, 10);
     if(err != RT_EOK)
     {
         LOG_E("Failed to create LVGL thread");

env_support/rt-thread/squareline/SConscript

@@ -1,10 +1,25 @@
 from building import *
 
 cwd = GetCurrentDir()
-src = ['lv_ui_entry.c']
-
-src += Glob(cwd + '/ui/*.c')
-
-group = DefineGroup('LVGL-SquareLine', src, depend = ['PKG_USING_LVGL_SQUARELINE'])
-
+src = Glob('*.c')
+inc = [cwd]
+ 
+# check if .h or .hpp files exsit
+def check_h_hpp_exsit(path):
+    file_dirs = os.listdir(path)
+    for file_dir in file_dirs:
+        if os.path.splitext(file_dir)[1] in ['.h', '.hpp']:
+            return True
+    return False
+ 
+sls_src_cwd = cwd
+for root, dirs, files in os.walk(sls_src_cwd):
+    for dir in dirs:
+        current_path = os.path.join(root, dir)
+        src = src + Glob(os.path.join(current_path,'*.c')) # add all .c files
+        if check_h_hpp_exsit(current_path): # add .h and .hpp path
+            inc = inc + [current_path]
+ 
+group = DefineGroup('LVGL-SquareLine', src, depend = ['PKG_USING_LVGL_SQUARELINE'], CPPPATH = inc)
+ 
 Return('group')

examples/anim/lv_example_anim_1.c

@@ -43,7 +43,6 @@ void lv_example_anim_1(void)
     lv_label_set_text(label, "Hello animations!");
     lv_obj_set_pos(label, 100, 10);
 
-
     lv_obj_t * sw = lv_switch_create(lv_scr_act());
     lv_obj_center(sw);
     lv_obj_add_state(sw, LV_STATE_CHECKED);

examples/anim/lv_example_anim_2.c

@@ -1,7 +1,6 @@
 #include "../lv_examples.h"
 #if LV_BUILD_EXAMPLES && LV_USE_SWITCH
 
-
 static void anim_x_cb(void * var, int32_t v)
 {
     lv_obj_set_x(var, v);

examples/arduino/LVGL_Arduino/LVGL_Arduino.ino

@@ -14,7 +14,7 @@ static const uint16_t screenWidth  = 480;
 static const uint16_t screenHeight = 320;
 
 static lv_disp_draw_buf_t draw_buf;
-static lv_color_t buf[ screenWidth * 10 ];
+static lv_color_t buf[ screenWidth * screenHeight / 10 ];
 
 TFT_eSPI tft = TFT_eSPI(screenWidth, screenHeight); /* TFT instance */
 
@@ -28,7 +28,7 @@ void my_print(const char * buf)
 #endif
 
 /* Display flushing */
-void my_disp_flush( lv_disp_t *disp, const lv_area_t *area, lv_color_t *color_p )
+void my_disp_flush( lv_disp_drv_t *disp_drv, const lv_area_t *area, lv_color_t *color_p )
 {
     uint32_t w = ( area->x2 - area->x1 + 1 );
     uint32_t h = ( area->y2 - area->y1 + 1 );
@@ -38,11 +38,11 @@ void my_disp_flush( lv_disp_t *disp, const lv_area_t *area, lv_color_t *color_p
     tft.pushColors( ( uint16_t * )&color_p->full, w * h, true );
     tft.endWrite();
 
-    lv_disp_flush_ready( disp );
+    lv_disp_flush_ready( disp_drv );
 }
 
 /*Read the touchpad*/
-void my_touchpad_read( lv_indev_t * indev_driver, lv_indev_data_t * data )
+void my_touchpad_read( lv_indev_drv_t * indev_drv, lv_indev_data_t * data )
 {
     uint16_t touchX, touchY;
 
@@ -93,10 +93,10 @@ void setup()
     uint16_t calData[5] = { 275, 3620, 264, 3532, 1 };
     tft.setTouch( calData );
 
-    lv_disp_draw_buf_init( &draw_buf, buf, NULL, screenWidth * 10 );
+    lv_disp_draw_buf_init( &draw_buf, buf, NULL, screenWidth * screenHeight / 10 );
 
     /*Initialize the display*/
-    static lv_disp_t disp_drv;
+    static lv_disp_drv_t disp_drv;
     lv_disp_drv_init( &disp_drv );
     /*Change the following line to your display resolution*/
     disp_drv.hor_res = screenWidth;
@@ -106,31 +106,30 @@ void setup()
     lv_disp_drv_register( &disp_drv );
 
     /*Initialize the (dummy) input device driver*/
-    static lv_indev_t indev_drv;
+    static lv_indev_drv_t indev_drv;
     lv_indev_drv_init( &indev_drv );
     indev_drv.type = LV_INDEV_TYPE_POINTER;
     indev_drv.read_cb = my_touchpad_read;
     lv_indev_drv_register( &indev_drv );
-
-#if 0
+  
     /* Create simple label */
     lv_obj_t *label = lv_label_create( lv_scr_act() );
-    lv_label_set_text( label, LVGL_Arduino.c_str() );
+    lv_label_set_text( label, "Hello Ardino and LVGL!");
     lv_obj_align( label, LV_ALIGN_CENTER, 0, 0 );
-#else
-    /* Try an example from the lv_examples Arduino library
-       make sure to include it as written above.
-    lv_example_btn_1();
-   */
-
-    // uncomment one of these demos
-    lv_demo_widgets();            // OK
-    // lv_demo_benchmark();          // OK
-    // lv_demo_keypad_encoder();     // works, but I haven't an encoder
-    // lv_demo_music();              // NOK
+ 
+    /* Try an example. See all the examples 
+     * online: https://docs.lvgl.io/master/examples.html
+     * source codes: https://github.com/lvgl/lvgl/tree/e7f88efa5853128bf871dde335c0ca8da9eb7731/examples */
+     //lv_example_btn_1();
+   
+     /*Or try out a demo. Don't forget to enable the demos in lv_conf.h. E.g. LV_USE_DEMOS_WIDGETS*/
+    //lv_demo_widgets();               
+    // lv_demo_benchmark();          
+    // lv_demo_keypad_encoder();     
+    // lv_demo_music();              
     // lv_demo_printer();
-    // lv_demo_stress();             // seems to be OK
-#endif
+    // lv_demo_stress();
+    
     Serial.println( "Setup done" );
 }
 

examples/layouts/grid/lv_example_grid_2.c

@@ -1,7 +1,6 @@
 #include "../../lv_examples.h"
 #if LV_USE_GRID && LV_BUILD_EXAMPLES
 
-
 /**
  * Demonstrate cell placement and span
  */

examples/layouts/grid/lv_example_grid_4.c

@@ -9,7 +9,6 @@ void lv_example_grid_4(void)
     static lv_coord_t col_dsc[] = {60, 60, 60, LV_GRID_TEMPLATE_LAST};
     static lv_coord_t row_dsc[] = {45, 45, 45, LV_GRID_TEMPLATE_LAST};
 
-
     /*Add space between the columns and move the rows to the bottom (end)*/
 
     /*Create a container with grid*/