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rymek pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/mynewt-core.git

commit e9b2f7a57808357b92ffc33061375311ce7fd772
Author: Jerzy Kasenberg <[email protected]>
AuthorDate: Thu Mar 2 12:18:30 2023 +0100

    lvgl: Add initial support for LVGL library
---
 .rat-excludes                             |   3 +-
 .style_ignored_dirs                       |   3 +
 LICENSE                                   |   4 +
 hw/drivers/display/lvgl/default/lv_conf.h | 757 ++++++++++++++++++++++++++++++
 hw/drivers/display/lvgl/include/lv_glue.h |  36 ++
 hw/drivers/display/lvgl/pkg.yml           |  74 +++
 hw/drivers/display/lvgl/src/mynewt_lvgl.c |  84 ++++
 hw/drivers/display/lvgl/syscfg.yml        |  65 +++
 8 files changed, 1025 insertions(+), 1 deletion(-)

diff --git a/.rat-excludes b/.rat-excludes
index d84d0b50a..43d0c2229 100644
--- a/.rat-excludes
+++ b/.rat-excludes
@@ -499,4 +499,5 @@ startup_stm32l073xx.s
 # MK64F12 SDK - BSD License
 MK64F12
 
-
+# LVGL configuration file - MIT license
+lv_conf.h
diff --git a/.style_ignored_dirs b/.style_ignored_dirs
index d170cafad..b39da5fac 100644
--- a/.style_ignored_dirs
+++ b/.style_ignored_dirs
@@ -54,3 +54,6 @@ fs/littlefs/include/littlefs/lfs.h
 fs/littlefs/include/littlefs/lfs_util.h
 fs/littlefs/src/lfs.c
 fs/littlefs/src/lfs_util.c
+
+# LVGL formated file
+hw/drivers/display/lvgl/default/lv_conf.h
diff --git a/LICENSE b/LICENSE
index 6d5941891..b9ab67054 100644
--- a/LICENSE
+++ b/LICENSE
@@ -748,3 +748,7 @@ license. Bundled files are:
     * fs/littlefs/DESIGN.md
     * fs/littlefs/README.md
     * fs/littlefs/SPEC.md
+
+This product bundles part of lvgl, which is available under the MIT license.
+Bundled files are:
+    * hw/drivers/display/lvgl/default/lv_conf.h
diff --git a/hw/drivers/display/lvgl/default/lv_conf.h 
b/hw/drivers/display/lvgl/default/lv_conf.h
new file mode 100644
index 000000000..df7a40b1c
--- /dev/null
+++ b/hw/drivers/display/lvgl/default/lv_conf.h
@@ -0,0 +1,757 @@
+/**
+ * Copy of template file found in lvgl repository
+ * Copy of template file found in lvgl repository
+ * Configuration file for v8.3.6
+ */
+
+/* clang-format off */
+#if 1 /*Set it to "1" to enable content*/
+
+#ifndef LV_CONF_H
+#define LV_CONF_H
+
+#include <stdint.h>
+#include <syscfg/syscfg.h>
+
+/*====================
+   COLOR SETTINGS
+ *====================*/
+
+/*Color depth: 1 (1 byte per pixel), 8 (RGB332), 16 (RGB565), 32 (ARGB8888)*/
+#define LV_COLOR_DEPTH 16
+
+/*Swap the 2 bytes of RGB565 color. Useful if the display has an 8-bit 
interface (e.g. SPI)*/
+#define LV_COLOR_16_SWAP MYNEWT_VAL(LV_COLOR_16_SWAP)
+
+/*Enable features to draw on transparent background.
+ *It's required if opa, and transform_* style properties are used.
+ *Can be also used if the UI is above another layer, e.g. an OSD menu or video 
player.*/
+#define LV_COLOR_SCREEN_TRANSP 0
+
+/* Adjust color mix functions rounding. GPUs might calculate color mix 
(blending) differently.
+ * 0: round down, 64: round up from x.75, 128: round up from half, 192: round 
up from x.25, 254: round up */
+#define LV_COLOR_MIX_ROUND_OFS 0
+
+/*Images pixels with this color will not be drawn if they are chroma keyed)*/
+#define LV_COLOR_CHROMA_KEY lv_color_hex(0x00ff00)         /*pure green*/
+
+/*=========================
+   MEMORY SETTINGS
+ *=========================*/
+
+/*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 available for `lv_mem_alloc()` in bytes (>= 2kB)*/
+    #define LV_MEM_SIZE (48U * 1024U)          /*[bytes]*/
+
+    /*Set an address for the memory pool instead of allocating it as a normal 
array. Can be in external SRAM too.*/
+    #define LV_MEM_ADR 0     /*0: unused*/
+    /*Instead of an address give a memory allocator that will be called to get 
a memory pool for LVGL. E.g. my_malloc*/
+    #if LV_MEM_ADR == 0
+        #undef LV_MEM_POOL_INCLUDE
+        #undef LV_MEM_POOL_ALLOC
+    #endif
+
+#else       /*LV_MEM_CUSTOM*/
+    #define LV_MEM_CUSTOM_INCLUDE <stdlib.h>   /*Header for the dynamic memory 
function*/
+    #define LV_MEM_CUSTOM_ALLOC   malloc
+    #define LV_MEM_CUSTOM_FREE    free
+    #define LV_MEM_CUSTOM_REALLOC realloc
+#endif     /*LV_MEM_CUSTOM*/
+
+/*Number of the intermediate memory buffer used during rendering and other 
internal processing mechanisms.
+ *You will see an error log message if there wasn't enough buffers. */
+#define LV_MEM_BUF_MAX_NUM 16
+
+/*Use the standard `memcpy` and `memset` instead of LVGL's own functions. 
(Might or might not be faster).*/
+#define LV_MEMCPY_MEMSET_STD 0
+
+/*====================
+   HAL SETTINGS
+ *====================*/
+
+/*Default display refresh period. LVG will redraw changed areas with this 
period time*/
+#define LV_DISP_DEF_REFR_PERIOD 30      /*[ms]*/
+
+/*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()`)*/
+#define LV_TICK_CUSTOM 1
+#if LV_TICK_CUSTOM
+    #define LV_TICK_CUSTOM_INCLUDE <os/os_time.h>         /*Header for the 
system time function*/
+    #define LV_TICK_CUSTOM_SYS_TIME_EXPR 
(os_time_ticks_to_ms32(os_time_get()))    /*Expression evaluating to current 
system time in ms*/
+#endif   /*LV_TICK_CUSTOM*/
+
+/*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]*/
+
+/*=======================
+ * FEATURE CONFIGURATION
+ *=======================*/
+
+/*-------------
+ * Drawing
+ *-----------*/
+
+    /*Enable complex draw engine.
+     *Required to draw shadow, gradient, rounded corners, circles, arc, skew 
lines, image transformations or any masks*/
+#define LV_DRAW_COMPLEX 1
+#if LV_DRAW_COMPLEX != 0
+
+    /*Allow buffering some shadow calculation.
+    *LV_SHADOW_CACHE_SIZE is the max. shadow size to buffer, where shadow size 
is `shadow_width + radius`
+    *Caching has LV_SHADOW_CACHE_SIZE^2 RAM cost*/
+    #define LV_SHADOW_CACHE_SIZE 0
+
+    /* Set number of maximally cached circle data.
+    * The circumference of 1/4 circle are saved for anti-aliasing
+    * radius * 4 bytes are used per circle (the most often used radiuses are 
saved)
+    * 0: to disable caching */
+    #define LV_CIRCLE_CACHE_SIZE 4
+#endif /*LV_DRAW_COMPLEX*/
+
+/**
+ * "Simple layers" are used when a widget has `style_opa < 255` to buffer the 
widget into a layer
+ * and blend it as an image with the given opacity.
+ * Note that `bg_opa`, `text_opa` etc don't require buffering into layer)
+ * The widget can be buffered in smaller chunks to avoid using large buffers.
+ *
+ * - LV_LAYER_SIMPLE_BUF_SIZE: [bytes] the optimal target buffer size. LVGL 
will try to allocate it
+ * - LV_LAYER_SIMPLE_FALLBACK_BUF_SIZE: [bytes]  used if 
`LV_LAYER_SIMPLE_BUF_SIZE` couldn't be allocated.
+ *
+ * Both buffer sizes are in bytes.
+ * "Transformed layers" (where transform_angle/zoom properties are used) use 
larger buffers
+ * and can't be drawn in chunks. So these settings affects only widgets with 
opacity.
+ */
+#define LV_LAYER_SIMPLE_BUF_SIZE          (24 * 1024)
+#define LV_LAYER_SIMPLE_FALLBACK_BUF_SIZE (3 * 1024)
+
+/*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. if 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.
+ *0: to disable caching*/
+#define LV_IMG_CACHE_DEF_SIZE 0
+
+/*Number of stops allowed per gradient. Increase this to allow more stops.
+ *This adds (sizeof(lv_color_t) + 1) bytes per additional stop*/
+#define LV_GRADIENT_MAX_STOPS 2
+
+    /*Default gradient buffer size.
+     *When LVGL calculates the gradient "maps" it can save them into a cache 
to avoid calculating them again.
+ *LV_GRAD_CACHE_DEF_SIZE sets the size of this cache in bytes.
+     *If the cache is too small the map will be allocated only while it's 
required for the drawing.
+     *0 mean no caching.*/
+#define LV_GRAD_CACHE_DEF_SIZE 0
+
+    /*Allow dithering the gradients (to achieve visual smooth color gradients 
on limited color depth display)
+ *LV_DITHER_GRADIENT implies allocating one or two more lines of the object's 
rendering surface
+     *The increase in memory consumption is (32 bits * object width) plus 24 
bits * object width if using error diffusion */
+#define LV_DITHER_GRADIENT 0
+#if LV_DITHER_GRADIENT
+        /*Add support for error diffusion dithering.
+         *Error diffusion dithering gets a much better visual result, but 
implies more CPU consumption and memory when drawing.
+         *The increase in memory consumption is (24 bits * object's width)*/
+    #define LV_DITHER_ERROR_DIFFUSION 0
+    #endif
+
+/*Maximum buffer size to allocate for rotation.
+ *Only used if software rotation is enabled in the display driver.*/
+#define LV_DISP_ROT_MAX_BUF (10*1024)
+
+/*-------------
+ * GPU
+ *-----------*/
+
+/*Use Arm's 2D acceleration library Arm-2D */
+#define LV_USE_GPU_ARM2D 0
+
+/*Use STM32's DMA2D (aka Chrom Art) GPU*/
+#define LV_USE_GPU_STM32_DMA2D 0
+#if LV_USE_GPU_STM32_DMA2D
+    /*Must be defined to include path of CMSIS header of target processor
+    e.g. "stm32f7xx.h" or "stm32f4xx.h"*/
+    #define LV_GPU_DMA2D_CMSIS_INCLUDE
+#endif
+
+/*Use SWM341's DMA2D GPU*/
+#define LV_USE_GPU_SWM341_DMA2D 0
+#if LV_USE_GPU_SWM341_DMA2D
+    #define LV_GPU_SWM341_DMA2D_INCLUDE "SWM341.h"
+#endif
+
+/*Use NXP's PXP GPU iMX RTxxx platforms*/
+#define LV_USE_GPU_NXP_PXP 0
+#if LV_USE_GPU_NXP_PXP
+    /*1: Add default bare metal and FreeRTOS interrupt handling routines for 
PXP (lv_gpu_nxp_pxp_osa.c)
+    *   and call lv_gpu_nxp_pxp_init() automatically during lv_init(). Note 
that symbol SDK_OS_FREE_RTOS
+    *   has to be defined in order to use FreeRTOS OSA, otherwise bare-metal 
implementation is selected.
+    *0: lv_gpu_nxp_pxp_init() has to be called manually before lv_init()
+    */
+    #define LV_USE_GPU_NXP_PXP_AUTO_INIT 0
+#endif
+
+/*Use NXP's VG-Lite GPU iMX RTxxx platforms*/
+#define LV_USE_GPU_NXP_VG_LITE 0
+
+/*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
+ *-----------*/
+
+/*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_USER        Only logs added by the user
+    *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
+
+    /*Enable/disable LV_LOG_TRACE in modules that produces a huge number of 
logs*/
+    #define LV_LOG_TRACE_MEM        1
+    #define LV_LOG_TRACE_TIMER      1
+    #define LV_LOG_TRACE_INDEV      1
+    #define LV_LOG_TRACE_DISP_REFR  1
+    #define LV_LOG_TRACE_EVENT      1
+    #define LV_LOG_TRACE_OBJ_CREATE 1
+    #define LV_LOG_TRACE_LAYOUT     1
+    #define LV_LOG_TRACE_ANIM       1
+
+#endif  /*LV_USE_LOG*/
+
+/*-------------
+ * Asserts
+ *-----------*/
+
+/*Enable asserts if an operation is failed or an invalid data is found.
+ *If LV_USE_LOG is enabled an error message will be printed on failure*/
+#define LV_USE_ASSERT_NULL          1   /*Check if the parameter is NULL. 
(Very fast, recommended)*/
+#define LV_USE_ASSERT_MALLOC        1   /*Checks is the memory is successfully 
allocated or no. (Very fast, recommended)*/
+#define LV_USE_ASSERT_STYLE         0   /*Check if the styles are properly 
initialized. (Very fast, recommended)*/
+#define LV_USE_ASSERT_MEM_INTEGRITY 0   /*Check the integrity of `lv_mem` 
after critical operations. (Slow)*/
+#define LV_USE_ASSERT_OBJ           0   /*Check the object's type and 
existence (e.g. not deleted). (Slow)*/
+
+/*Add a custom handler when assert happens e.g. to restart the MCU*/
+#define LV_ASSERT_HANDLER_INCLUDE <stdint.h>
+#define LV_ASSERT_HANDLER while(1);   /*Halt by default*/
+
+/*-------------
+ * Others
+ *-----------*/
+
+/*1: Show CPU usage and FPS count*/
+#define LV_USE_PERF_MONITOR 0
+#if LV_USE_PERF_MONITOR
+    #define LV_USE_PERF_MONITOR_POS LV_ALIGN_BOTTOM_RIGHT
+#endif
+
+/*1: Show the used memory and the memory fragmentation
+ * Requires LV_MEM_CUSTOM = 0*/
+#define LV_USE_MEM_MONITOR 0
+#if LV_USE_MEM_MONITOR
+    #define LV_USE_MEM_MONITOR_POS LV_ALIGN_BOTTOM_LEFT
+#endif
+
+/*1: Draw random colored rectangles over the redrawn areas*/
+#define LV_USE_REFR_DEBUG 0
+
+/*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
+#else   /*LV_SPRINTF_CUSTOM*/
+    #define LV_SPRINTF_USE_FLOAT 0
+#endif  /*LV_SPRINTF_CUSTOM*/
+
+#define LV_USE_USER_DATA 1
+
+/*Garbage Collector settings
+ *Used if lvgl is bound 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*/
+#endif /*LV_ENABLE_GC*/
+
+/*=====================
+ *  COMPILER SETTINGS
+ *====================*/
+
+/*For big endian systems set to 1*/
+#define LV_BIG_ENDIAN_SYSTEM 0
+
+/*Define a custom attribute to `lv_tick_inc` function*/
+#define LV_ATTRIBUTE_TICK_INC
+
+/*Define a custom attribute to `lv_timer_handler` function*/
+#define LV_ATTRIBUTE_TIMER_HANDLER
+
+/*Define a custom attribute to `lv_disp_flush_ready` function*/
+#define LV_ATTRIBUTE_FLUSH_READY
+
+/*Required alignment size for buffers*/
+#define LV_ATTRIBUTE_MEM_ALIGN_SIZE 1
+
+/*Will be added where memories needs to be aligned (with -Os data might not be 
aligned to boundary by default).
+ * 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
+
+/*Compiler prefix for a big array declaration in RAM*/
+#define LV_ATTRIBUTE_LARGE_RAM_ARRAY
+
+/*Place performance critical functions into a faster memory (e.g RAM)*/
+#define LV_ATTRIBUTE_FAST_MEM
+
+/*Prefix variables that are used in GPU accelerated operations, often these 
need to be placed in RAM sections that are DMA accessible*/
+#define LV_ATTRIBUTE_DMA
+
+/*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.*/
+#define LV_EXPORT_CONST_INT(int_value) struct _silence_gcc_warning /*The 
default value just prevents GCC warning*/
+
+/*Extend the default -32k..32k coordinate range to -4M..4M by using int32_t 
for coordinates instead of int16_t*/
+#define LV_USE_LARGE_COORD 0
+
+/*==================
+ *   FONT USAGE
+ *===================*/
+
+/*Montserrat fonts with ASCII range and some symbols using bpp = 4
+ *https://fonts.google.com/specimen/Montserrat*/
+#define LV_FONT_MONTSERRAT_8  0
+#define LV_FONT_MONTSERRAT_10 0
+#define LV_FONT_MONTSERRAT_12 1
+#define LV_FONT_MONTSERRAT_14 1
+#define LV_FONT_MONTSERRAT_16 1
+#define LV_FONT_MONTSERRAT_18 0
+#define LV_FONT_MONTSERRAT_20 0
+#define LV_FONT_MONTSERRAT_22 0
+#define LV_FONT_MONTSERRAT_24 0
+#define LV_FONT_MONTSERRAT_26 0
+#define LV_FONT_MONTSERRAT_28 0
+#define LV_FONT_MONTSERRAT_30 0
+#define LV_FONT_MONTSERRAT_32 0
+#define LV_FONT_MONTSERRAT_34 0
+#define LV_FONT_MONTSERRAT_36 0
+#define LV_FONT_MONTSERRAT_38 0
+#define LV_FONT_MONTSERRAT_40 0
+#define LV_FONT_MONTSERRAT_42 0
+#define LV_FONT_MONTSERRAT_44 0
+#define LV_FONT_MONTSERRAT_46 0
+#define LV_FONT_MONTSERRAT_48 0
+
+/*Demonstrate special features*/
+#define LV_FONT_MONTSERRAT_12_SUBPX      0
+#define LV_FONT_MONTSERRAT_28_COMPRESSED 0  /*bpp = 3*/
+#define LV_FONT_DEJAVU_16_PERSIAN_HEBREW 0  /*Hebrew, Arabic, Persian letters 
and all their forms*/
+#define LV_FONT_SIMSUN_16_CJK            0  /*1000 most common CJK radicals*/
+
+/*Pixel perfect monospace fonts*/
+#define LV_FONT_UNSCII_8  0
+#define LV_FONT_UNSCII_16 0
+
+/*Optionally declare 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*/
+#define LV_FONT_DEFAULT &lv_font_montserrat_14
+
+/*Enable handling large font and/or fonts with a lot of characters.
+ *The limit depends on the font size, font face and bpp.
+ *Compiler error will be triggered if a font needs it.*/
+#define LV_FONT_FMT_TXT_LARGE 0
+
+/*Enables/disables support for compressed fonts.*/
+#define LV_USE_FONT_COMPRESSED 0
+
+/*Enable subpixel rendering*/
+#define LV_USE_FONT_SUBPX 0
+#if LV_USE_FONT_SUBPX
+    /*Set the pixel order of the display. Physical order of RGB channels. 
Doesn't matter with "normal" fonts.*/
+    #define LV_FONT_SUBPX_BGR 0  /*0: RGB; 1:BGR order*/
+#endif
+
+/*Enable drawing placeholders when glyph dsc is not found*/
+#define LV_USE_FONT_PLACEHOLDER 1
+
+/*=================
+ *  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 0
+
+/*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 Bidirectional 
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_BASE_DIR_LTR` Left-to-Right
+    *`LV_BASE_DIR_RTL` Right-to-Left
+    *`LV_BASE_DIR_AUTO` detect texts base direction*/
+    #define LV_BIDI_BASE_DIR_DEF LV_BASE_DIR_AUTO
+#endif
+
+/*Enable Arabic/Persian processing
+ *In these languages characters should be replaced with an other form based on 
their position in the text*/
+#define LV_USE_ARABIC_PERSIAN_CHARS 0
+
+/*==================
+ *  WIDGET USAGE
+ *================*/
+
+/*Documentation of the widgets: 
https://docs.lvgl.io/latest/en/html/widgets/index.html*/
+
+#define LV_USE_ARC        1
+
+#define LV_USE_BAR        1
+
+#define LV_USE_BTN        1
+
+#define LV_USE_BTNMATRIX  1
+
+#define LV_USE_CANVAS     1
+
+#define LV_USE_CHECKBOX   1
+
+#define LV_USE_DROPDOWN   1   /*Requires: lv_label*/
+
+#define LV_USE_IMG        1   /*Requires: lv_label*/
+
+#define LV_USE_LABEL      1
+#if LV_USE_LABEL
+    #define LV_LABEL_TEXT_SELECTION 1 /*Enable selecting text of the label*/
+    #define LV_LABEL_LONG_TXT_HINT 1  /*Store some extra info in labels to 
speed up drawing of very long texts*/
+#endif
+
+#define LV_USE_LINE       1
+
+#define LV_USE_ROLLER     1   /*Requires: lv_label*/
+#if LV_USE_ROLLER
+    #define LV_ROLLER_INF_PAGES 7 /*Number of extra "pages" when the roller is 
infinite*/
+#endif
+
+#define LV_USE_SLIDER     1   /*Requires: lv_bar*/
+
+#define LV_USE_SWITCH     1
+
+#define LV_USE_TEXTAREA   1   /*Requires: lv_label*/
+#if LV_USE_TEXTAREA != 0
+    #define LV_TEXTAREA_DEF_PWD_SHOW_TIME 1500    /*ms*/
+#endif
+
+#define LV_USE_TABLE      1
+
+/*==================
+ * EXTRA COMPONENTS
+ *==================*/
+
+/*-----------
+ * Widgets
+ *----------*/
+#define LV_USE_ANIMIMG    1
+
+#define LV_USE_CALENDAR   1
+#if LV_USE_CALENDAR
+    #define LV_CALENDAR_WEEK_STARTS_MONDAY 0
+    #if LV_CALENDAR_WEEK_STARTS_MONDAY
+        #define LV_CALENDAR_DEFAULT_DAY_NAMES {"Mo", "Tu", "We", "Th", "Fr", 
"Sa", "Su"}
+    #else
+        #define LV_CALENDAR_DEFAULT_DAY_NAMES {"Su", "Mo", "Tu", "We", "Th", 
"Fr", "Sa"}
+    #endif
+
+    #define LV_CALENDAR_DEFAULT_MONTH_NAMES {"January", "February", "March",  
"April", "May",  "June", "July", "August", "September", "October", "November", 
"December"}
+    #define LV_USE_CALENDAR_HEADER_ARROW 1
+    #define LV_USE_CALENDAR_HEADER_DROPDOWN 1
+#endif  /*LV_USE_CALENDAR*/
+
+#define LV_USE_CHART      1
+
+#define LV_USE_COLORWHEEL 1
+
+#define LV_USE_IMGBTN     1
+
+#define LV_USE_KEYBOARD   1
+
+#define LV_USE_LED        1
+
+#define LV_USE_LIST       1
+
+#define LV_USE_MENU       1
+
+#define LV_USE_METER      1
+
+#define LV_USE_MSGBOX     1
+
+#define LV_USE_SPAN       1
+#if LV_USE_SPAN
+    /*A line text can contain maximum num of span descriptor */
+    #define LV_SPAN_SNIPPET_STACK_SIZE 64
+#endif
+
+#define LV_USE_SPINBOX    1
+
+#define LV_USE_SPINNER    1
+
+#define LV_USE_TABVIEW    1
+
+#define LV_USE_TILEVIEW   1
+
+#define LV_USE_WIN        1
+
+/*-----------
+ * Themes
+ *----------*/
+
+/*A simple, impressive and very complete theme*/
+#define LV_USE_THEME_DEFAULT 1
+#if LV_USE_THEME_DEFAULT
+
+    /*0: Light mode; 1: Dark mode*/
+    #define LV_THEME_DEFAULT_DARK 0
+
+    /*1: Enable grow on press*/
+    #define LV_THEME_DEFAULT_GROW 1
+
+    /*Default transition time in [ms]*/
+    #define LV_THEME_DEFAULT_TRANSITION_TIME 80
+#endif /*LV_USE_THEME_DEFAULT*/
+
+/*A very simple theme that is a good starting point for a custom theme*/
+#define LV_USE_THEME_BASIC 1
+
+/*A theme designed for monochrome displays*/
+#define LV_USE_THEME_MONO 1
+
+/*-----------
+ * Layouts
+ *----------*/
+
+/*A layout similar to Flexbox in CSS.*/
+#define LV_USE_FLEX 1
+
+/*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
+
+/*PNG decoder library*/
+#define LV_USE_PNG 0
+
+/*BMP decoder library*/
+#define LV_USE_BMP 0
+
+/* JPG + split JPG decoder library.
+ * Split JPG is a custom format optimized for embedded systems. */
+#define LV_USE_SJPG 0
+
+/*GIF decoder library*/
+#define LV_USE_GIF 0
+
+/*QR code library*/
+#define LV_USE_QRCODE 0
+
+/*FreeType library*/
+#define LV_USE_FREETYPE 0
+#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
+
+/*Rlottie library*/
+#define LV_USE_RLOTTIE 0
+
+/*FFmpeg library for image decoding and playing videos
+ *Supports all major image formats so do not enable other image decoder with 
it*/
+#define LV_USE_FFMPEG 0
+#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*/
+#define LV_USE_IME_PINYIN 0
+#if LV_USE_IME_PINYIN
+    /*1: Use default thesaurus*/
+    /*If you do not use the default thesaurus, be sure to use `lv_ime_pinyin` 
after setting the thesauruss*/
+    #define LV_IME_PINYIN_USE_DEFAULT_DICT 1
+    /*Set the maximum number of candidate panels that can be displayed*/
+    /*This needs to be adjusted according to the size of the screen*/
+    #define LV_IME_PINYIN_CAND_TEXT_NUM 6
+
+    /*Use 9 key input(k9)*/
+    #define LV_IME_PINYIN_USE_K9_MODE      1
+    #if LV_IME_PINYIN_USE_K9_MODE == 1
+        #define LV_IME_PINYIN_K9_CAND_TEXT_NUM 3
+    #endif // LV_IME_PINYIN_USE_K9_MODE
+#endif
+
+/*==================
+* EXAMPLES
+*==================*/
+
+/*Enable the examples to be built with the library*/
+#define LV_BUILD_EXAMPLES MYNEWT_VAL(LVGL_EXAMPLES)
+
+/*===================
+ * DEMO USAGE
+ ====================*/
+
+/*Show some widget. It might be required to increase `LV_MEM_SIZE` */
+#define LV_USE_DEMO_WIDGETS MYNEWT_VAL(LV_USE_DEMO_WIDGETS)
+#if LV_USE_DEMO_WIDGETS
+    #define LV_DEMO_WIDGETS_SLIDESHOW 0
+#endif
+
+/*Demonstrate the usage of encoder and keyboard*/
+#define LV_USE_DEMO_KEYPAD_AND_ENCODER 
MYNEWT_VAL(LV_USE_DEMO_KEYPAD_AND_ENCODER)
+
+/*Benchmark your system*/
+#define LV_USE_DEMO_BENCHMARK MYNEWT_VAL(LV_USE_DEMO_BENCHMARK)
+#if LV_USE_DEMO_BENCHMARK
+    /*Use RGB565A8 images with 16 bit color depth instead of ARGB8565*/
+    #define LV_DEMO_BENCHMARK_RGB565A8 0
+#endif
+
+/*Stress test for LVGL*/
+#define LV_USE_DEMO_STRESS MYNEWT_VAL(LV_USE_DEMO_STRESS)
+
+/*Music player demo*/
+#define LV_USE_DEMO_MUSIC MYNEWT_VAL(LV_USE_DEMO_MUSIC)
+#if LV_USE_DEMO_MUSIC
+    #define LV_DEMO_MUSIC_SQUARE    0
+    #define LV_DEMO_MUSIC_LANDSCAPE 0
+    #define LV_DEMO_MUSIC_ROUND     0
+    #define LV_DEMO_MUSIC_LARGE     0
+    #define LV_DEMO_MUSIC_AUTO_PLAY 0
+#endif
+
+/*Flex layout demo*/
+#define LV_USE_DEMO_FLEX_LAYOUT MYNEWT_VAL(LV_USE_DEMO_FLEX_LAYOUT)
+
+/*--END OF LV_CONF_H--*/
+
+#endif /*LV_CONF_H*/
+
+#endif /*End of "Content enable"*/
diff --git a/hw/drivers/display/lvgl/include/lv_glue.h 
b/hw/drivers/display/lvgl/include/lv_glue.h
new file mode 100644
index 000000000..4eed4cbea
--- /dev/null
+++ b/hw/drivers/display/lvgl/include/lv_glue.h
@@ -0,0 +1,36 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+#ifndef LV_GLUE_H
+#define LV_GLUE_H
+
+#include <stdint.h>
+#include <hal/lv_hal_disp.h>
+
+void lv_touch_handler(void);
+/**
+ * Driver initialization function
+ *
+ * Function should be implemented by display driver
+ *
+ * @param driver - lvgl display driver
+ */
+void mynewt_lv_drv_init(lv_disp_drv_t *driver);
+
+#endif /* LV_GLUE_H */
diff --git a/hw/drivers/display/lvgl/pkg.yml b/hw/drivers/display/lvgl/pkg.yml
new file mode 100644
index 000000000..17f2a63ff
--- /dev/null
+++ b/hw/drivers/display/lvgl/pkg.yml
@@ -0,0 +1,74 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#  http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+pkg.name: hw/drivers/display/lvgl
+pkg.description: Mynewt part for LVGL
+pkg.keywords:
+    - display
+
+pkg.type: sdk
+
+pkg.include_dirs.LVGL_DEFAULT_LV_CONF:
+    - "@apache-mynewt-core/hw/drivers/display/lvgl/default"
+
+pkg.include_dirs:
+    - "@lvgl/src"
+    - "@lvgl/."
+
+pkg.src_dirs:
+    - "@lvgl/src/"
+    - "src"
+
+pkg.include_dirs.LVGL_DEMOS:
+    - "@lvgl/demos/benchmark/assets"
+
+pkg.src_dirs.LVGL_DEMOS:
+    - "@lvgl/demos/benchmark"
+    - "@lvgl/demos/widgets"
+    - "@lvgl/demos/stress"
+    - "@lvgl/demos/music"
+    - "@lvgl/demos/keypad_encoder"
+
+pkg.src_dirs.LVGL_EXAMPLES:
+    - "@lvgl/examples/widgets"
+
+pkg.source_files:
+
+pkg.ign_files:
+
+pkg.ign_dirs:
+
+pkg.deps:
+    - "@apache-mynewt-core/hw/hal"
+    - "@apache-mynewt-core/hw/cmsis-core"
+
+pkg.cflags:
+    - -DLV_CONF_INCLUDE_SIMPLE=1
+    - -Wno-unused-variable
+    - -Wno-format
+
+pkg.init:
+    mynewt_lv_init: 1000
+
+repository.lvgl:
+    type: github
+    branch: master
+    vers: v8.3.6-commit
+    user: lvgl
+    repo: lvgl
diff --git a/hw/drivers/display/lvgl/src/mynewt_lvgl.c 
b/hw/drivers/display/lvgl/src/mynewt_lvgl.c
new file mode 100644
index 000000000..5c68a42c4
--- /dev/null
+++ b/hw/drivers/display/lvgl/src/mynewt_lvgl.c
@@ -0,0 +1,84 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+#include <stdint.h>
+#include <syscfg/syscfg.h>
+#include <os/os_time.h>
+#include <os/os_cputime.h>
+#include <os/os_callout.h>
+#include <core/lv_refr.h>
+#include <lv_glue.h>
+
+static struct os_callout lv_callout;
+static os_time_t lv_timer_period;
+
+void lv_timer_cb(struct os_event *ev)
+{
+    (void)ev;
+
+    lv_refr_now(NULL);
+    lv_timer_handler();
+    os_callout_reset(&lv_callout, lv_timer_period);
+}
+
+static void
+init_lv_timer(void)
+{
+    lv_timer_period = os_time_ms_to_ticks32(MYNEWT_VAL(LVGL_TIMER_PERIOD_MS));
+    /*
+     * Initialize the callout for a timer event.
+     */
+    os_callout_init(&lv_callout, os_eventq_dflt_get(),
+                    lv_timer_cb, NULL);
+
+    os_callout_reset(&lv_callout, lv_timer_period);
+}
+
+/* A static or global variable to store the buffers */
+static lv_disp_draw_buf_t disp_buf;
+/* A variable to hold the drivers. Must be static or global. */
+static lv_disp_drv_t disp_drv;
+#define DISP_HOR_RES MYNEWT_VAL(LVGL_DISPLAY_HORIZONTAL_RESOLUTION)
+#define DISP_VERT_RES MYNEWT_VAL(LVGL_DISPLAY_VERTICAL_RESOLUTION)
+/* Static or global buffer(s). The second buffer is optional */
+static lv_color_t buf_1[DISP_HOR_RES * 10];
+static lv_color_t buf_2[DISP_HOR_RES * 10];
+
+void
+mynewt_lv_init(void)
+{
+    lv_disp_t *disp;
+
+    init_lv_timer();
+
+    lv_init();
+
+    /*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, buf_2, DISP_HOR_RES * 10);
+    lv_disp_drv_init(&disp_drv);            /* Basic initialization */
+    disp_drv.draw_buf = &disp_buf;          /* Set an initialized buffer */
+    disp_drv.hor_res = DISP_HOR_RES;        /* Set the horizontal resolution 
in pixels */
+    disp_drv.ver_res = DISP_VERT_RES;       /* Set the vertical resolution in 
pixels */
+
+    mynewt_lv_drv_init(&disp_drv);
+
+    /* Register the driver and save the created display objects */
+    disp = lv_disp_drv_register(&disp_drv);
+    lv_disp_set_default(disp);
+}
diff --git a/hw/drivers/display/lvgl/syscfg.yml 
b/hw/drivers/display/lvgl/syscfg.yml
new file mode 100644
index 000000000..145147a5b
--- /dev/null
+++ b/hw/drivers/display/lvgl/syscfg.yml
@@ -0,0 +1,65 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#  http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+syscfg.defs:
+    LV_COLOR_16_SWAP:
+        description: >
+            LV_COLOR_16_SWAP changes order of 16 bit RGB value to
+            better match 8 bit SPI protocol.
+        value: 0
+    LVGL_TIMER_PERIOD_MS:
+        description: LV timer interval for periodical refresh and touch read
+        value: 10
+    LVGL_DISPLAY_HORIZONTAL_RESOLUTION:
+        description: Default display horizontal resolution.
+        value:
+        restrictions: $notnull
+    LVGL_DISPLAY_VERTICAL_RESOLUTION:
+        description: Default display horizontal resolution.
+        value:
+        restrictions: $notnull
+
+    LVGL_DEFAULT_LV_CONF:
+        description: Add default lv_conf.h to the build.
+        value: 1
+
+    LVGL_EXAMPLES:
+        description: Add LVGL examples to build.
+        value: 1
+    LVGL_DEMOS:
+        description: Add LVGL demos to build.
+        value: 1
+
+    LV_USE_DEMO_FLEX_LAYOUT:
+        description: Enable Flex Layout demo.
+        value: 1
+    LV_USE_DEMO_MUSIC:
+        description: Enable Music demo.
+        value: 1
+    LV_USE_DEMO_STRESS:
+        description: Enable Stress demo.
+        value: 1
+    LV_USE_DEMO_BENCHMARK:
+        description: Enable Benchmark demo.
+        value: 1
+    LV_USE_DEMO_KEYPAD_AND_ENCODER:
+        description: Enable keypad and encoder demo.
+        value: 1
+    LV_USE_DEMO_WIDGETS:
+        description: Enable Widgets demo.
+        value: 1


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