gui: Added glue logic for LittlevGL GUI library

Added glue logic to interface Zephyr with LittlevGL GUI library

This includes:
 * KConfig options for all lvgl options
 * Kernel & user space memory management
 * Zephyr to lvgl FS call mapping
 * Color space conversion function

Signed-off-by: Jan Van Winkel <[email protected]>

lib/CMakeLists.txt

@@ -12,3 +12,4 @@ add_subdirectory_ifdef(CONFIG_POSIX_API            posix)
 add_subdirectory_ifdef(CONFIG_CMSIS_RTOS_V1        cmsis_rtos_v1)
 add_subdirectory_ifdef(CONFIG_CMSIS_RTOS_V2        cmsis_rtos_v2)
 add_subdirectory(rbtree)
+add_subdirectory(gui)

lib/Kconfig

@@ -30,4 +30,7 @@ source "lib/posix/Kconfig"
 
 source "lib/cmsis_rtos_v1/Kconfig"
 source "lib/cmsis_rtos_v2/Kconfig"
+
+source "lib/gui/Kconfig"
+
 endmenu

lib/gui/CMakeLists.txt

@@ -0,0 +1 @@
+add_subdirectory_if_kconfig(lvgl)

lib/gui/Kconfig

@@ -0,0 +1,11 @@
+#
+# Copyright (c) 2018 Jan Van Winkel <[email protected]>
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+menu "Graphical user interface"
+
+rsource "lvgl/Kconfig"
+
+endmenu

lib/gui/lvgl/CMakeLists.txt

@@ -0,0 +1,175 @@
+include(FetchContent)
+
+set(lv_name lvgl)
+
+set(ep_base ${PROJECT_BINARY_DIR}/ext_proj)
+set_property(DIRECTORY PROPERTY "EP_BASE" ${ep_base})
+
+set(lv_SOURCE_DIR ${ep_base}/Source/${lv_name})
+set(lv_SUBBUILD_DIR ${ep_base}/Subbuild/${lv_name})
+
+FetchContent_Declare(
+    ${lv_name}
+    GIT_REPOSITORY https://github.com/littlevgl/lvgl.git
+    GIT_TAG        v5.2
+    SOURCE_DIR     ${lv_SOURCE_DIR}
+    BINARY_DIR     ${lv_SOURCE_DIR}
+    SUBBUILD_DIR   ${lv_SUBBUILD_DIR}
+)
+
+FetchContent_GetProperties(${lv_name})
+if(NOT ${lv_name}_POPULATED)
+    FetchContent_Populate(${lv_name})
+endif()
+
+zephyr_interface_library_named(lvgl)
+
+set(LVGL_SOURCE_DIR ${${lv_name}_SOURCE_DIR})
+
+target_include_directories(lvgl INTERFACE ${LVGL_SOURCE_DIR})
+target_include_directories(lvgl INTERFACE ${CMAKE_CURRENT_SOURCE_DIR})
+
+zephyr_compile_definitions(LV_CONF_INCLUDE_SIMPLE=1)
+
+zephyr_library()
+
+zephyr_library_sources(
+
+    ${LVGL_SOURCE_DIR}/lv_core/lv_group.c
+    ${LVGL_SOURCE_DIR}/lv_core/lv_indev.c
+    ${LVGL_SOURCE_DIR}/lv_core/lv_obj.c
+    ${LVGL_SOURCE_DIR}/lv_core/lv_refr.c
+    ${LVGL_SOURCE_DIR}/lv_core/lv_style.c
+    ${LVGL_SOURCE_DIR}/lv_core/lv_vdb.c
+
+    ${LVGL_SOURCE_DIR}/lv_draw/lv_draw.c
+    ${LVGL_SOURCE_DIR}/lv_draw/lv_draw_arc.c
+    ${LVGL_SOURCE_DIR}/lv_draw/lv_draw_img.c
+    ${LVGL_SOURCE_DIR}/lv_draw/lv_draw_label.c
+    ${LVGL_SOURCE_DIR}/lv_draw/lv_draw_line.c
+    ${LVGL_SOURCE_DIR}/lv_draw/lv_draw_rbasic.c
+    ${LVGL_SOURCE_DIR}/lv_draw/lv_draw_rect.c
+    ${LVGL_SOURCE_DIR}/lv_draw/lv_draw_triangle.c
+    ${LVGL_SOURCE_DIR}/lv_draw/lv_draw_vbasic.c
+
+    ${LVGL_SOURCE_DIR}/lv_hal/lv_hal_disp.c
+    ${LVGL_SOURCE_DIR}/lv_hal/lv_hal_indev.c
+    ${LVGL_SOURCE_DIR}/lv_hal/lv_hal_tick.c
+
+    ${LVGL_SOURCE_DIR}/lv_misc/lv_anim.c
+    ${LVGL_SOURCE_DIR}/lv_misc/lv_area.c
+    ${LVGL_SOURCE_DIR}/lv_misc/lv_circ.c
+    ${LVGL_SOURCE_DIR}/lv_misc/lv_color.c
+    ${LVGL_SOURCE_DIR}/lv_misc/lv_font.c
+    ${LVGL_SOURCE_DIR}/lv_misc/lv_fs.c
+    ${LVGL_SOURCE_DIR}/lv_misc/lv_ll.c
+    ${LVGL_SOURCE_DIR}/lv_misc/lv_log.c
+    ${LVGL_SOURCE_DIR}/lv_misc/lv_math.c
+    ${LVGL_SOURCE_DIR}/lv_misc/lv_mem.c
+    ${LVGL_SOURCE_DIR}/lv_misc/lv_task.c
+    ${LVGL_SOURCE_DIR}/lv_misc/lv_templ.c
+    ${LVGL_SOURCE_DIR}/lv_misc/lv_txt.c
+
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_arc.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_bar.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_btn.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_btnm.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_calendar.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_cb.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_chart.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_cont.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_ddlist.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_gauge.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_img.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_imgbtn.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_kb.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_label.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_led.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_line.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_list.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_lmeter.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_mbox.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_objx_templ.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_page.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_preload.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_roller.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_slider.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_sw.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_ta.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_tabview.c
+    ${LVGL_SOURCE_DIR}/lv_objx/lv_win.c
+
+    ${LVGL_SOURCE_DIR}/lv_themes/lv_theme.c
+    ${LVGL_SOURCE_DIR}/lv_themes/lv_theme_alien.c
+    ${LVGL_SOURCE_DIR}/lv_themes/lv_theme_default.c
+    ${LVGL_SOURCE_DIR}/lv_themes/lv_theme_material.c
+    ${LVGL_SOURCE_DIR}/lv_themes/lv_theme_mono.c
+    ${LVGL_SOURCE_DIR}/lv_themes/lv_theme_nemo.c
+    ${LVGL_SOURCE_DIR}/lv_themes/lv_theme_night.c
+    ${LVGL_SOURCE_DIR}/lv_themes/lv_theme_templ.c
+    ${LVGL_SOURCE_DIR}/lv_themes/lv_theme_zen.c
+
+    ${LVGL_SOURCE_DIR}/lv_fonts/lv_font_builtin.c
+)
+
+zephyr_library_sources_ifdef( CONFIG_LVGL_BUILD_IN_FONT_10
+    ${LVGL_SOURCE_DIR}/lv_fonts/lv_font_dejavu_10.c
+    ${LVGL_SOURCE_DIR}/lv_fonts/lv_font_dejavu_10_cyrillic.c
+    ${LVGL_SOURCE_DIR}/lv_fonts/lv_font_dejavu_10_latin_sup.c
+    ${LVGL_SOURCE_DIR}/lv_fonts/lv_font_symbol_10.c
+)
+
+zephyr_library_sources_ifdef( CONFIG_LVGL_BUILD_IN_FONT_20
+    ${LVGL_SOURCE_DIR}/lv_fonts/lv_font_dejavu_20.c
+    ${LVGL_SOURCE_DIR}/lv_fonts/lv_font_dejavu_20_cyrillic.c
+    ${LVGL_SOURCE_DIR}/lv_fonts/lv_font_dejavu_20_latin_sup.c
+    ${LVGL_SOURCE_DIR}/lv_fonts/lv_font_symbol_20.c
+)
+
+zephyr_library_sources_ifdef( CONFIG_LVGL_BUILD_IN_FONT_30
+    ${LVGL_SOURCE_DIR}/lv_fonts/lv_font_dejavu_30.c
+    ${LVGL_SOURCE_DIR}/lv_fonts/lv_font_dejavu_30_cyrillic.c
+    ${LVGL_SOURCE_DIR}/lv_fonts/lv_font_dejavu_30_latin_sup.c
+    ${LVGL_SOURCE_DIR}/lv_fonts/lv_font_symbol_30.c
+)
+
+zephyr_library_sources_ifdef( CONFIG_LVGL_BUILD_IN_FONT_40
+    ${LVGL_SOURCE_DIR}/lv_fonts/lv_font_dejavu_40.c
+    ${LVGL_SOURCE_DIR}/lv_fonts/lv_font_dejavu_40_cyrillic.c
+    ${LVGL_SOURCE_DIR}/lv_fonts/lv_font_dejavu_40_latin_sup.c
+    ${LVGL_SOURCE_DIR}/lv_fonts/lv_font_symbol_40.c
+)
+
+zephyr_library_sources_ifdef( CONFIG_LVGL_BUILD_IN_FONT_MONOSPACE
+    ${LVGL_SOURCE_DIR}/lv_fonts/lv_font_monospace_8.c
+)
+
+zephyr_library_sources_ifdef( CONFIG_LVGL_COLOR_DEPTH_32
+    lvgl_color_32.c
+)
+
+zephyr_library_sources_ifdef( CONFIG_LVGL_COLOR_DEPTH_16
+    lvgl_color_16.c
+)
+
+zephyr_library_sources_ifdef( CONFIG_LVGL_COLOR_DEPTH_8
+    lvgl_color_8.c
+)
+
+zephyr_library_sources_ifdef( CONFIG_LVGL_COLOR_DEPTH_1
+    lvgl_color_1.c
+)
+
+zephyr_library_sources_ifdef( CONFIG_LVGL_FILESYSTEM
+    lvgl_fs.c
+)
+
+zephyr_library_sources(lvgl.c)
+
+zephyr_library_sources_ifdef( CONFIG_LVGL_MEM_POOL_USER lvgl_mem_user.c)
+
+zephyr_library_sources_ifdef( CONFIG_LVGL_MEM_POOL_KERNEL lvgl_mem_kernel.c)
+
+zephyr_library_link_libraries(lvgl)
+
+target_link_libraries(lvgl INTERFACE zephyr_interface)