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Re: [Minios-devel] [UNIKRAFT/LIBLVGL PATCH v2 1/1] libs/lvgl: LittleVGL library



Thanks for the work!

Reviewed-by: Simon Kuenzer <simon.kuenzer@xxxxxxxxx>

On 23.01.20 10:29, Felipe Huici wrote:
From: Santiago Pagani <santiago.pagani@xxxxxxxxx>

Initial port of the LittleVGL library, tested on the Raspberry Pi 3B+.

Signed-off-by: Felipe Huici <felipe.huici@xxxxxxxxx>
Signed-off-by: Santiago Pagani <santiagopagani@xxxxxxxxx>
---
  Config.uk         |   5 +
  Makefile.uk       | 203 ++++++++++++++++
  include/lv_conf.h | 591 ++++++++++++++++++++++++++++++++++++++++++++++
  3 files changed, 799 insertions(+)
  create mode 100644 Config.uk
  create mode 100644 Makefile.uk
  create mode 100644 include/lv_conf.h

diff --git a/Config.uk b/Config.uk
new file mode 100644
index 0000000..6d94316
--- /dev/null
+++ b/Config.uk
@@ -0,0 +1,5 @@
+config LIBLVGL
+          bool "lvgl: LittlevGL Embedded GUI Library"
+          default n
+          select LIBNEWLIBC
+
diff --git a/Makefile.uk b/Makefile.uk
new file mode 100644
index 0000000..2982872
--- /dev/null
+++ b/Makefile.uk
@@ -0,0 +1,203 @@
+#  liblvgl Makefile.uk
+#
+#  Authors: Felipe Huici <felipe.huici@xxxxxxxxx>
+#
+#
+#  Copyright (c) 2019, NEC Europe Ltd., NEC Corporation. All rights reserved.
+#
+#  Redistribution and use in source and binary forms, with or without
+#  modification, are permitted provided that the following conditions
+#  are met:
+#
+#  1. Redistributions of source code must retain the above copyright
+#     notice, this list of conditions and the following disclaimer.
+#  2. Redistributions in binary form must reproduce the above copyright
+#     notice, this list of conditions and the following disclaimer in the
+#     documentation and/or other materials provided with the distribution.
+#  3. Neither the name of the copyright holder nor the names of its
+#     contributors may be used to endorse or promote products derived from
+#     this software without specific prior written permission.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+#  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+#  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+#  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+#  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+#  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+#  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+#  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+#  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+#  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+#  POSSIBILITY OF SUCH DAMAGE.
+#
+#  THIS HEADER MAY NOT BE EXTRACTED OR MODIFIED IN ANY WAY.
+#
+
+################################################################################
+# Library registration
+################################################################################
+$(eval $(call addlib_s,liblvgl,$(CONFIG_LIBLVGL)))
+
+################################################################################
+# Original sources
+################################################################################
+LIBLVGL_VERSION=3429e58d3c40efa47201e03382cbcec1e65d9882
+LIBLVGL_URL=https://github.com/littlevgl/lvgl/archive/$(LIBLVGL_VERSION).zip
+LIBLVGL_DIR=lvgl-$(LIBLVGL_VERSION)
+
+$(eval $(call fetch,liblvgl,$(LIBLVGL_URL),lvgl-$(LIBLVGL_VERSION).zip))
+
+################################################################################
+# Helpers
+################################################################################
+LIBLVGL_EXTRACTED=$(LIBLVGL_ORIGIN)/$(LIBLVGL_DIR)
+
+################################################################################
+# Library includes
+################################################################################
+LIBLVGL_INCLUDES += -I$(LIBLVGL_BASE)/include            \
+                   -I$(LIBLVGL_EXTRACTED)               \
+                   -I$(LIBLVGL_EXTRACTED)/porting       \
+                   -I$(LIBLVGL_EXTRACTED)/src           \
+                   -I$(LIBLVGL_EXTRACTED)/src/lv_core   \
+                   -I$(LIBLVGL_EXTRACTED)/src/lv_themes \
+                   -I$(LIBLVGL_EXTRACTED)/src/lv_draw   \
+                   -I$(LIBLVGL_EXTRACTED)/src/lv_font   \
+                   -I$(LIBLVGL_EXTRACTED)/src/lv_hal    \
+                   -I$(LIBLVGL_EXTRACTED)/lv_misc       \
+                   -I$(LIBLVGL_EXTRACTED)/src/lv_objx   \
+
+CINCLUDES-$(CONFIG_LIBLVGL)   += $(LIBLVGL_INCLUDES)
+CXXINCLUDES-$(CONFIG_LIBLVGL) += $(LIBLVGL_INCLUDES)
+
+################################################################################
+# Global flags
+################################################################################
+LIBLVGL_FLAGS = -DLV_CONF_INCLUDE_SIMPLE
+LIBLVGL_SUPPRESS_FLAGS += -Wno-unused-parameter -Wno-unused-value
+
+LIBLVGL_CFLAGS-y     += $(LIBLVGL_FLAGS)          \
+                       $(LIBLVGL_SUPPRESS_FLAGS)
+
+################################################################################
+# Sources - porting
+################################################################################
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/porting/lv_port_fs_template.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/porting/lv_port_indev_template.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/porting/lv_port_disp_template.c
+
+################################################################################
+# Sources - themes
+################################################################################
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_themes/lv_theme_zen.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_themes/lv_theme_default.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_themes/lv_theme_nemo.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_themes/lv_theme.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_themes/lv_theme_night.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_themes/lv_theme_alien.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_themes/lv_theme_mono.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_themes/lv_theme_material.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_themes/lv_theme_templ.c
+
+################################################################################
+# Sources - draw
+################################################################################
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_draw/lv_img_decoder.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_draw/lv_draw_line.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_draw/lv_draw_arc.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_draw/lv_draw_label.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_draw/lv_draw.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_draw/lv_draw_img.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_draw/lv_draw_rect.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_draw/lv_img_cache.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_draw/lv_draw_basic.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_draw/lv_draw_triangle.c
+
+################################################################################
+# Sources - font
+################################################################################
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_font/lv_font_roboto_22.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_font/lv_font_fmt_txt.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_font/lv_font_roboto_12.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_font/lv_font_unscii_8.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_font/lv_font_roboto_16.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_font/lv_font_roboto_12_subpx.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_font/lv_font_roboto_28.c
+LIBLVGL_SRCS-y += 
$(LIBLVGL_EXTRACTED)/src/lv_font/lv_font_roboto_28_compressed.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_font/lv_font.c
+
+################################################################################
+# Sources - hal
+################################################################################
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_hal/lv_hal_indev.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_hal/lv_hal_disp.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_hal/lv_hal_tick.c
+
+################################################################################
+# Sources - misc
+################################################################################
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_misc/lv_anim.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_misc/lv_circ.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_misc/lv_area.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_misc/lv_math.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_misc/lv_utils.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_misc/lv_async.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_misc/lv_fs.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_misc/lv_ll.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_misc/lv_task.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_misc/lv_color.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_misc/lv_templ.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_misc/lv_log.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_misc/lv_txt.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_misc/lv_bidi.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_misc/lv_printf.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_misc/lv_mem.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_misc/lv_gc.c
+
+################################################################################
+# Sources - objx
+################################################################################
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_bar.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_calendar.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_img.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_tabview.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_ta.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_cpicker.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_objx_templ.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_label.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_led.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_arc.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_tileview.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_cb.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_slider.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_table.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_page.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_kb.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_line.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_mbox.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_preload.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_imgbtn.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_ddlist.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_lmeter.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_spinbox.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_btn.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_canvas.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_gauge.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_sw.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_btnm.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_win.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_roller.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_list.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_chart.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_objx/lv_cont.c
+
+################################################################################
+# Sources - core
+################################################################################
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_core/lv_obj.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_core/lv_debug.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_core/lv_disp.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_core/lv_style.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_core/lv_indev.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_core/lv_refr.c
+LIBLVGL_SRCS-y += $(LIBLVGL_EXTRACTED)/src/lv_core/lv_group.c
diff --git a/include/lv_conf.h b/include/lv_conf.h
new file mode 100644
index 0000000..0c7913b
--- /dev/null
+++ b/include/lv_conf.h
@@ -0,0 +1,591 @@
+/**
+ * @file lv_conf.h
+ *
+ */
+
+/*
+ * COPY THIS FILE AS `lv_conf.h` NEXT TO the `lvgl` FOLDER
+ */
+
+#if 1 /*Set it to "1" to enable content*/
+
+#ifndef LV_CONF_H
+#define LV_CONF_H
+/* clang-format off */
+
+#include <stdint.h>
+
+/*====================
+   Graphical settings
+ *====================*/
+
+/* Maximal horizontal and vertical resolution to support by the library.*/
+#define LV_HOR_RES_MAX          (800)
+#define LV_VER_RES_MAX          (480)
+
+/* Color depth:
+ * - 1:  1 byte per pixel
+ * - 8:  RGB233
+ * - 16: RGB565
+ * - 32: ARGB8888
+ */
+#define LV_COLOR_DEPTH     32
+
+/* Swap the 2 bytes of RGB565 color.
+ * Useful if the display has a 8 bit interface (e.g. SPI)*/
+#define LV_COLOR_16_SWAP   0
+
+/* 1: Enable screen transparency.
+ * Useful for OSD or other overlapping GUIs.
+ * Requires `LV_COLOR_DEPTH = 32` colors and the screen's style should be 
modified: `style.body.opa = ...`*/
+#define LV_COLOR_SCREEN_TRANSP    0
+
+/*Images pixels with this color will not be drawn (with chroma keying)*/
+#define LV_COLOR_TRANSP    LV_COLOR_LIME         /*LV_COLOR_LIME: pure green*/
+
+/* Enable chroma keying for indexed images. */
+#define LV_INDEXED_CHROMA    1
+
+/* Enable anti-aliasing (lines, and radiuses will be smoothed) */
+#define LV_ANTIALIAS        1
+
+/* Default display refresh period.
+ * Can be changed in the display driver (`lv_disp_drv_t`).*/
+#define LV_DISP_DEF_REFR_PERIOD      30      /*[ms]*/
+
+/* Dot Per Inch: used to initialize default sizes.
+ * E.g. a button with width = LV_DPI / 2 -> half inch wide
+ * (Not so important, you can adjust it to modify default sizes and spaces)*/
+#define LV_DPI              100     /*[px]*/
+
+/* Type of coordinates. Should be `int16_t` (or `int32_t` for extreme cases) */
+typedef int16_t lv_coord_t;
+
+/*=========================
+   Memory manager settings
+ *=========================*/
+
+/* LittelvGL's internal memory manager's settings.
+ * The graphical objects and other related data are stored here. */
+
+/* 1: use custom malloc/free, 0: use the built-in `lv_mem_alloc` and 
`lv_mem_free` */
+#define LV_MEM_CUSTOM      0
+#if LV_MEM_CUSTOM == 0
+/* Size of the memory used by `lv_mem_alloc` in bytes (>= 2kB)*/
+#  define LV_MEM_SIZE    (32U * 1024U)
+
+/* Complier prefix for a big array declaration */
+#  define LV_MEM_ATTR
+
+/* Set an address for the memory pool instead of allocating it as an array.
+ * Can be in external SRAM too. */
+#  define LV_MEM_ADR          0
+
+/* Automatically defrag. on free. Defrag. means joining the adjacent free 
cells. */
+#  define LV_MEM_AUTO_DEFRAG  1
+#else       /*LV_MEM_CUSTOM*/
+#  define LV_MEM_CUSTOM_INCLUDE <stdlib.h>   /*Header for the dynamic memory 
function*/
+#  define LV_MEM_CUSTOM_ALLOC   malloc       /*Wrapper to malloc*/
+#  define LV_MEM_CUSTOM_FREE    free         /*Wrapper to free*/
+#endif     /*LV_MEM_CUSTOM*/
+
+/* Garbage Collector settings
+ * Used if lvgl is binded to higher level language and the memory is managed 
by that language */
+#define LV_ENABLE_GC 0
+#if LV_ENABLE_GC != 0
+#  define LV_GC_INCLUDE "gc.h"                           /*Include Garbage 
Collector related things*/
+#  define LV_MEM_CUSTOM_REALLOC   your_realloc           /*Wrapper to realloc*/
+#  define LV_MEM_CUSTOM_GET_SIZE  your_mem_get_size      /*Wrapper to 
lv_mem_get_size*/
+#endif /* LV_ENABLE_GC */
+
+/*=======================
+   Input device settings
+ *=======================*/
+
+/* Input device default settings.
+ * Can be changed in the Input device driver (`lv_indev_drv_t`)*/
+
+/* Input device read period in milliseconds */
+#define LV_INDEV_DEF_READ_PERIOD          30
+
+/* Drag threshold in pixels */
+#define LV_INDEV_DEF_DRAG_LIMIT           10
+
+/* Drag throw slow-down in [%]. Greater value -> faster slow-down */
+#define LV_INDEV_DEF_DRAG_THROW           20
+
+/* Long press time in milliseconds.
+ * Time to send `LV_EVENT_LONG_PRESSSED`) */
+#define LV_INDEV_DEF_LONG_PRESS_TIME      400
+
+/* Repeated trigger period in long press [ms]
+ * Time between `LV_EVENT_LONG_PRESSED_REPEAT */
+#define LV_INDEV_DEF_LONG_PRESS_REP_TIME  100
+
+/*==================
+ * Feature usage
+ *==================*/
+
+/*1: Enable the Animations */
+#define LV_USE_ANIMATION        0
+#if LV_USE_ANIMATION
+
+/*Declare the type of the user data of animations (can be e.g. `void *`, 
`int`, `struct`)*/
+typedef void * lv_anim_user_data_t;
+
+#endif
+
+/* 1: Enable shadow drawing*/
+#define LV_USE_SHADOW           1
+
+/* 1: Enable object groups (for keyboard/encoder navigation) */
+#define LV_USE_GROUP            1
+#if LV_USE_GROUP
+typedef void * lv_group_user_data_t;
+#endif  /*LV_USE_GROUP*/
+
+/* 1: Enable GPU interface*/
+#define LV_USE_GPU              0
+
+/* 1: Enable file system (might be required for images */
+#define LV_USE_FILESYSTEM       0
+#if LV_USE_FILESYSTEM
+/*Declare the type of the user data of file system drivers (can be e.g. `void 
*`, `int`, `struct`)*/
+typedef void * lv_fs_drv_user_data_t;
+#endif
+
+/*1: Add a `user_data` to drivers and objects*/
+#define LV_USE_USER_DATA        0
+
+/*========================
+ * Image decoder and cache
+ *========================*/
+
+/* 1: Enable indexed (palette) images */
+#define LV_IMG_CF_INDEXED       1
+
+/* 1: Enable alpha indexed images */
+#define LV_IMG_CF_ALPHA         1
+
+/* Default image cache size. Image caching keeps the images opened.
+ * If only the built-in image formats are used there is no real advantage of 
caching.
+ * (I.e. no new image decoder is added)
+ * With complex image decoders (e.g. PNG or JPG) caching can save the 
continuous open/decode of images.
+ * However the opened images might consume additional RAM.
+ * LV_IMG_CACHE_DEF_SIZE must be >= 1 */
+#define LV_IMG_CACHE_DEF_SIZE       1
+
+/*Declare the type of the user data of image decoder (can be e.g. `void *`, 
`int`, `struct`)*/
+typedef void * lv_img_decoder_user_data_t;
+
+/*=====================
+ *  Compiler settings
+ *====================*/
+/* Define a custom attribute to `lv_tick_inc` function */
+#define LV_ATTRIBUTE_TICK_INC
+
+/* Define a custom attribute to `lv_task_handler` function */
+#define LV_ATTRIBUTE_TASK_HANDLER
+
+/* With size optimization (-Os) the compiler might not align data to
+ * 4 or 8 byte boundary. This alignment will be explicitly applied where 
needed.
+ * E.g. __attribute__((aligned(4))) */
+#define LV_ATTRIBUTE_MEM_ALIGN
+
+/* Attribute to mark large constant arrays for example
+ * font's bitmaps */
+#define LV_ATTRIBUTE_LARGE_CONST
+
+/* Export integer constant to binding.
+ * This macro is used with constants in the form of LV_<CONST> that
+ * should also appear on lvgl binding API such as Micropython
+ *
+ * The default value just prevents a GCC warning.
+ */
+#define LV_EXPORT_CONST_INT(int_value) struct _silence_gcc_warning
+
+/*===================
+ *  HAL settings
+ *==================*/
+
+/* 1: use a custom tick source.
+ * It removes the need to manually update the tick with `lv_tick_inc`) */
+#define LV_TICK_CUSTOM     0
+#if LV_TICK_CUSTOM == 1
+#define LV_TICK_CUSTOM_INCLUDE  "something.h"       /*Header for the sys time 
function*/
+#define LV_TICK_CUSTOM_SYS_TIME_EXPR (millis())     /*Expression evaluating to 
current systime in ms*/
+#endif   /*LV_TICK_CUSTOM*/
+
+typedef void * lv_disp_drv_user_data_t;             /*Type of user data in the 
display driver*/
+typedef void * lv_indev_drv_user_data_t;            /*Type of user data in the 
input device driver*/
+
+/*================
+ * Log settings
+ *===============*/
+
+/*1: Enable the log module*/
+#define LV_USE_LOG      0
+#if LV_USE_LOG
+/* How important log should be added:
+ * LV_LOG_LEVEL_TRACE       A lot of logs to give detailed information
+ * LV_LOG_LEVEL_INFO        Log important events
+ * LV_LOG_LEVEL_WARN        Log if something unwanted happened but didn't 
cause a problem
+ * LV_LOG_LEVEL_ERROR       Only critical issue, when the system may fail
+ * LV_LOG_LEVEL_NONE        Do not log anything
+ */
+#  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   0
+#endif  /*LV_USE_LOG*/
+
+/*=================
+ * Debug settings
+ *================*/
+
+/* If Debug is enabled LittelvGL validates the parameters of the functions.
+ * If an invalid parameter is found an error log message is printed and
+ * the MCU halts at the error. (`LV_USE_LOG` should be enabled)
+ * If you are debugging the MCU you can pause
+ * the debugger to see exactly where  the issue is.
+ *
+ * The behavior of asserts can be overwritten by redefining them here.
+ * E.g. #define LV_ASSERT_MEM(p)  <my_assert_code>
+ */
+#define LV_USE_DEBUG        0
+#if LV_USE_DEBUG
+
+/*Check if the parameter is NULL. (Quite fast) */
+#define LV_USE_ASSERT_NULL      1
+
+/*Checks is the memory is successfully allocated or no. (Quite fast)*/
+#define LV_USE_ASSERT_MEM       1
+
+/* Check the strings.
+ * Search for NULL, very long strings, invalid characters, and unnatural 
repetitions. (Slow)
+ * If disabled `LV_USE_ASSERT_NULL` will be performed instead (if it's 
enabled) */
+#define LV_USE_ASSERT_STR       0
+
+/* Check NULL, the object's type and existence (e.g. not deleted). (Quite slow)
+ * If disabled `LV_USE_ASSERT_NULL` will be performed instead (if it's 
enabled) */
+#define LV_USE_ASSERT_OBJ       0
+
+/*Check if the styles are properly initialized. (Fast)*/
+#define LV_USE_ASSERT_STYLE     1
+
+#endif /*LV_USE_DEBUG*/
+
+/*================
+ *  THEME USAGE
+ *================*/
+#define LV_THEME_LIVE_UPDATE    0   /*1: Allow theme switching at run time. 
Uses 8..10 kB of RAM*/
+
+#define LV_USE_THEME_TEMPL      0   /*Just for test*/
+#define LV_USE_THEME_DEFAULT    0   /*Built mainly from the built-in styles. 
Consumes very few RAM*/
+#define LV_USE_THEME_ALIEN      0   /*Dark futuristic theme*/
+#define LV_USE_THEME_NIGHT      1   /*Dark elegant theme*/
+#define LV_USE_THEME_MONO       0   /*Mono color theme for monochrome 
displays*/
+#define LV_USE_THEME_MATERIAL   0   /*Flat theme with bold colors and light 
shadows*/
+#define LV_USE_THEME_ZEN        0   /*Peaceful, mainly light theme */
+#define LV_USE_THEME_NEMO       0   /*Water-like theme based on the movie "Finding 
Nemo"*/
+
+/*==================
+ *    FONT USAGE
+ *===================*/
+
+/* The built-in fonts contains the ASCII range and some Symbols with  4 
bit-per-pixel.
+ * The symbols are available via `LV_SYMBOL_...` defines
+ * More info about fonts: https://docs.littlevgl.com/#Fonts
+ * To create a new font go to: https://littlevgl.com/ttf-font-to-c-array
+ */
+
+/* Robot fonts with bpp = 4
+ * https://fonts.google.com/specimen/Roboto  */
+#define LV_FONT_ROBOTO_12    0
+#define LV_FONT_ROBOTO_16    1
+#define LV_FONT_ROBOTO_22    0
+#define LV_FONT_ROBOTO_28    0
+
+/* Demonstrate special features */
+#define LV_FONT_ROBOTO_12_SUBPX 1
+#define LV_FONT_ROBOTO_28_COMPRESSED 1  /*bpp = 3*/
+
+/*Pixel perfect monospace font
+ * http://pelulamu.net/unscii/ */
+#define LV_FONT_UNSCII_8     0
+
+/* Optionally declare your custom fonts here.
+ * You can use these fonts as default font too
+ * and they will be available globally. E.g.
+ * #define LV_FONT_CUSTOM_DECLARE LV_FONT_DECLARE(my_font_1) \
+ *                                LV_FONT_DECLARE(my_font_2)
+ */
+#define LV_FONT_CUSTOM_DECLARE
+
+/*Always set a default font from the built-in fonts*/
+#define LV_FONT_DEFAULT        &lv_font_roboto_16
+
+/* Enable it if you have fonts with a lot of characters.
+ * The limit depends on the font size, font face and bpp
+ * but with > 10,000 characters if you see issues probably you need to enable 
it.*/
+#define LV_FONT_FMT_TXT_LARGE   0
+
+/* Set the pixel order of the display.
+ * Important only if "subpx fonts" are used.
+ * With "normal" font it doesn't matter.
+ */
+#define LV_FONT_SUBPX_BGR    0
+
+/*Declare the type of the user data of fonts (can be e.g. `void *`, `int`, 
`struct`)*/
+typedef void * lv_font_user_data_t;
+
+/*=================
+ *  Text settings
+ *=================*/
+
+/* Select a character encoding for strings.
+ * Your IDE or editor should have the same character encoding
+ * - LV_TXT_ENC_UTF8
+ * - LV_TXT_ENC_ASCII
+ * */
+#define LV_TXT_ENC LV_TXT_ENC_UTF8
+
+ /*Can break (wrap) texts on these chars*/
+#define LV_TXT_BREAK_CHARS                  " ,.;:-_"
+
+/* If a word is at least this long, will break wherever "prettiest"
+ * To disable, set to a value <= 0 */
+#define LV_TXT_LINE_BREAK_LONG_LEN          12
+
+/* Minimum number of characters in a long word to put on a line before a break.
+ * Depends on LV_TXT_LINE_BREAK_LONG_LEN. */
+#define LV_TXT_LINE_BREAK_LONG_PRE_MIN_LEN  3
+
+/* Minimum number of characters in a long word to put on a line after a break.
+ * Depends on LV_TXT_LINE_BREAK_LONG_LEN. */
+#define LV_TXT_LINE_BREAK_LONG_POST_MIN_LEN 3
+
+/* The control character to use for signalling text recoloring. */
+#define LV_TXT_COLOR_CMD "#"
+
+/* Support bidirectional texts.
+ * Allows mixing Left-to-Right and Right-to-Left texts.
+ * The direction will be processed according to the Unicode Bidirectioanl 
Algorithm:
+ * https://www.w3.org/International/articles/inline-bidi-markup/uba-basics*/
+#define LV_USE_BIDI     0
+#if LV_USE_BIDI
+/* Set the default direction. Supported values:
+ * `LV_BIDI_DIR_LTR` Left-to-Right
+ * `LV_BIDI_DIR_RTL` Right-to-Left
+ * `LV_BIDI_DIR_AUTO` detect texts base direction */
+#define LV_BIDI_BASE_DIR_DEF  LV_BIDI_DIR_AUTO
+#endif
+
+/*Change the built in (v)snprintf functions*/
+#define LV_SPRINTF_CUSTOM   0
+#if LV_SPRINTF_CUSTOM
+#  define LV_SPRINTF_INCLUDE <stdio.h>
+#  define lv_snprintf     snprintf
+#  define lv_vsnprintf    vsnprintf
+#endif  /*LV_SPRINTF_CUSTOM*/
+
+/*===================
+ *  LV_OBJ SETTINGS
+ *==================*/
+
+/*Declare the type of the user data of object (can be e.g. `void *`, `int`, 
`struct`)*/
+typedef void * lv_obj_user_data_t;
+
+/*1: enable `lv_obj_realaign()` based on `lv_obj_align()` parameters*/
+#define LV_USE_OBJ_REALIGN          1
+
+/* Enable to make the object clickable on a larger area.
+ * LV_EXT_CLICK_AREA_OFF or 0: Disable this feature
+ * LV_EXT_CLICK_AREA_TINY: The extra area can be adjusted horizontally and 
vertically (0..255 px)
+ * LV_EXT_CLICK_AREA_FULL: The extra area can be adjusted in all 4 directions 
(-32k..+32k px)
+ */
+#define LV_USE_EXT_CLICK_AREA  LV_EXT_CLICK_AREA_OFF
+
+/*==================
+ *  LV OBJ X USAGE
+ *================*/
+/*
+ * Documentation of the object types: https://docs.littlevgl.com/#Object-types
+ */
+
+/*Arc (dependencies: -)*/
+#define LV_USE_ARC      1
+
+/*Bar (dependencies: -)*/
+#define LV_USE_BAR      1
+
+/*Button (dependencies: lv_cont*/
+#define LV_USE_BTN      1
+#if LV_USE_BTN != 0
+/*Enable button-state animations - draw a circle on click (dependencies: 
LV_USE_ANIMATION)*/
+#  define LV_BTN_INK_EFFECT   0
+#endif
+
+/*Button matrix (dependencies: -)*/
+#define LV_USE_BTNM     1
+
+/*Calendar (dependencies: -)*/
+#define LV_USE_CALENDAR 1
+
+/*Canvas (dependencies: lv_img)*/
+#define LV_USE_CANVAS   1
+
+/*Check box (dependencies: lv_btn, lv_label)*/
+#define LV_USE_CB       1
+
+/*Chart (dependencies: -)*/
+#define LV_USE_CHART    1
+#if LV_USE_CHART
+#  define LV_CHART_AXIS_TICK_LABEL_MAX_LEN    20
+#endif
+
+/*Container (dependencies: -*/
+#define LV_USE_CONT     1
+
+/*Color picker (dependencies: -*/
+#define LV_USE_CPICKER   1
+
+/*Drop down list (dependencies: lv_page, lv_label, lv_symbol_def.h)*/
+#define LV_USE_DDLIST    1
+#if LV_USE_DDLIST != 0
+/*Open and close default animation time [ms] (0: no animation)*/
+#  define LV_DDLIST_DEF_ANIM_TIME     200
+#endif
+
+/*Gauge (dependencies:lv_bar, lv_lmeter)*/
+#define LV_USE_GAUGE    1
+
+/*Image (dependencies: lv_label*/
+#define LV_USE_IMG      1
+
+/*Image Button (dependencies: lv_btn*/
+#define LV_USE_IMGBTN   1
+#if LV_USE_IMGBTN
+/*1: The imgbtn requires left, mid and right parts and the width can be set 
freely*/
+#  define LV_IMGBTN_TILED 0
+#endif
+
+/*Keyboard (dependencies: lv_btnm)*/
+#define LV_USE_KB       1
+
+/*Label (dependencies: -*/
+#define LV_USE_LABEL    1
+#if LV_USE_LABEL != 0
+/*Hor, or ver. scroll speed [px/sec] in 'LV_LABEL_LONG_ROLL/ROLL_CIRC' mode*/
+#  define LV_LABEL_DEF_SCROLL_SPEED       25
+
+/* Waiting period at beginning/end of animation cycle */
+#  define LV_LABEL_WAIT_CHAR_COUNT        3
+
+/*Enable selecting text of the label */
+#  define LV_LABEL_TEXT_SEL               0
+
+/*Store extra some info in labels (12 bytes) to speed up drawing of very long 
texts*/
+#  define LV_LABEL_LONG_TXT_HINT          0
+#endif
+
+/*LED (dependencies: -)*/
+#define LV_USE_LED      1
+
+/*Line (dependencies: -*/
+#define LV_USE_LINE     1
+
+/*List (dependencies: lv_page, lv_btn, lv_label, (lv_img optionally for icons 
))*/
+#define LV_USE_LIST     1
+#if LV_USE_LIST != 0
+/*Default animation time of focusing to a list element [ms] (0: no animation)  
*/
+#  define LV_LIST_DEF_ANIM_TIME  100
+#endif
+
+/*Line meter (dependencies: *;)*/
+#define LV_USE_LMETER   1
+
+/*Message box (dependencies: lv_rect, lv_btnm, lv_label)*/
+#define LV_USE_MBOX     1
+
+/*Page (dependencies: lv_cont)*/
+#define LV_USE_PAGE     1
+#if LV_USE_PAGE != 0
+/*Focus default animation time [ms] (0: no animation)*/
+#  define LV_PAGE_DEF_ANIM_TIME     400
+#endif
+
+/*Preload (dependencies: lv_arc, lv_anim)*/
+#define LV_USE_PRELOAD      0
+#if LV_USE_PRELOAD != 0
+#  define LV_PRELOAD_DEF_ARC_LENGTH   60      /*[deg]*/
+#  define LV_PRELOAD_DEF_SPIN_TIME    1000    /*[ms]*/
+#  define LV_PRELOAD_DEF_ANIM         LV_PRELOAD_TYPE_SPINNING_ARC
+#endif
+
+/*Roller (dependencies: lv_ddlist)*/
+#define LV_USE_ROLLER    1
+#if LV_USE_ROLLER != 0
+/*Focus animation time [ms] (0: no animation)*/
+#  define LV_ROLLER_DEF_ANIM_TIME     200
+
+/*Number of extra "pages" when the roller is infinite*/
+#  define LV_ROLLER_INF_PAGES         7
+#endif
+
+/*Slider (dependencies: lv_bar)*/
+#define LV_USE_SLIDER    1
+
+/*Spinbox (dependencies: lv_ta)*/
+#define LV_USE_SPINBOX       1
+
+/*Switch (dependencies: lv_slider)*/
+#define LV_USE_SW       1
+
+/*Text area (dependencies: lv_label, lv_page)*/
+#define LV_USE_TA       1
+#if LV_USE_TA != 0
+#  define LV_TA_DEF_CURSOR_BLINK_TIME 400     /*ms*/
+#  define LV_TA_DEF_PWD_SHOW_TIME     1500    /*ms*/
+#endif
+
+/*Table (dependencies: lv_label)*/
+#define LV_USE_TABLE    1
+#if LV_USE_TABLE
+#  define LV_TABLE_COL_MAX    12
+#endif
+
+/*Tab (dependencies: lv_page, lv_btnm)*/
+#define LV_USE_TABVIEW      1
+#  if LV_USE_TABVIEW != 0
+/*Time of slide animation [ms] (0: no animation)*/
+#  define LV_TABVIEW_DEF_ANIM_TIME    300
+#endif
+
+/*Tileview (dependencies: lv_page) */
+#define LV_USE_TILEVIEW     1
+#if LV_USE_TILEVIEW
+/*Time of slide animation [ms] (0: no animation)*/
+#  define LV_TILEVIEW_DEF_ANIM_TIME   300
+#endif
+
+/*Window (dependencies: lv_cont, lv_btn, lv_label, lv_img, lv_page)*/
+#define LV_USE_WIN      1
+
+/*==================
+ * Non-user section
+ *==================*/
+
+#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)    /* Disable 
warnings for Visual Studio*/
+#  define _CRT_SECURE_NO_WARNINGS
+#endif
+
+/*--END OF LV_CONF_H--*/
+
+/*Be sure every define has a default value*/
+#include <lv_conf_checker.h>
+
+#endif /*LV_CONF_H*/
+
+#endif /*End of "Content enable"*/


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