Add support for Zephyr intergartion (#1979)

* Removed src/lv_conf_zephyr.h

Removed src/lv_conf_zephyr.h as it is maintained in the Zephyr build it self.

* CMakeLists.txt: Added support for Zephyr RTOS

Added support to build LVGL as library for Zephyr RTOS

* Added support to use LVGL repo as Zephyr module

Added support to use the LVGL repository as a Zephyr module repository

CHANGELOG.md

@@ -6,6 +6,7 @@
 - feat(chart) add lv_chart_remove_series and lv_chart_hide_series
 - feat(img_cahce) allow disabling image cacheing
 - calendar: make get_day_of_week() public
+- Added support for Zephyr integration
  
 ### Bugfixes
 - fix(draw_rect) free buffer used for arabic processing

CMakeLists.txt

@@ -32,6 +32,33 @@ if (CONFIG_LV_ATTRIBUTE_FAST_MEM_USE_IRAM)
     target_compile_definitions(${COMPONENT_LIB} PUBLIC "-DLV_ATTRIBUTE_FAST_MEM=IRAM_ATTR")
 endif()
 
+elseif(ZEPHYR_BASE)
+
+if(CONFIG_LVGL)
+
+zephyr_include_directories(${ZEPHYR_BASE}/lib/gui/lvgl)
+
+target_include_directories(lvgl INTERFACE ${CMAKE_CURRENT_SOURCE_DIR})
+
+zephyr_compile_definitions(LV_CONF_KCONFIG_EXTERNAL_INCLUDE=<autoconf.h>)
+
+zephyr_compile_definitions_ifdef(CONFIG_LV_MEM_CUSTOM
+    LV_MEM_CUSTOM_ALLOC=${CONFIG_LV_MEM_CUSTOM_ALLOC}
+    )
+zephyr_compile_definitions_ifdef(CONFIG_LV_MEM_CUSTOM
+    LV_MEM_CUSTOM_FREE=${CONFIG_LV_MEM_CUSTOM_FREE}
+    )
+zephyr_compile_definitions_ifdef(CONFIG_LV_TICK_CUSTOM
+    LV_TICK_CUSTOM_SYS_TIME_EXPR=${CONFIG_LV_TICK_CUSTOM_SYS_TIME_EXPR}
+    )
+
+zephyr_library()
+
+file(GLOB_RECURSE SOURCES src/*.c)
+zephyr_library_sources(${SOURCES})
+
+endif() # CONFIG_LVGL
+
 else()
 message(FATAL_ERROR "Unknown platform.")
 endif()

src/lv_conf_zephyr.h

@@ -1,49 +0,0 @@
-/*
- * Copyright (c) 2020 Jan Van Winkel <jan.van_winkel@dxplore.eu>
- *
- * SPDX-License-Identifier: Apache-2.0
- */
-
-#ifdef __ZEPHYR__
-
-    #include <autoconf.h>
-
-    #define LV_MEM_CUSTOM 1
-
-    #define LV_MEMCPY_MEMSET_STD 1
-
-    #ifdef CONFIG_LVGL_MEM_POOL_HEAP_KERNEL
-
-        #define LV_MEM_CUSTOM_INCLUDE   "kernel.h"
-        #define LV_MEM_CUSTOM_ALLOC     k_malloc
-        #define LV_MEM_CUTOM_FREE       k_free
-
-    #elif defined(CONFIG_LVGL_MEM_POOL_HEAP_LIB_C)
-
-        #define LV_MEM_CUSTOM_INCLUDE   "stdlib.h"
-        #define LV_MEM_CUSTOM_ALLOC     malloc
-        #define LV_MEM_CUTOM_FREE       free
-
-    #else
-
-        #define LV_MEM_CUSTOM_INCLUDE   "lvgl_mem.h"
-        #define LV_MEM_CUSTOM_ALLOC     lvgl_malloc
-        #define LV_MEM_CUTOM_FREE       lvgl_free
-
-    #endif
-
-    #define LV_ENABLE_GC 0
-
-    #define LV_TICK_CUSTOM                  1
-    #define LV_TICK_CUSTOM_INCLUDE          "kernel.h"
-    #define LV_TICK_CUSTOM_SYS_TIME_EXPR    (k_uptime_get_32())
-
-    #define LV_SPRINTF_CUSTOM 1
-
-    #if LV_SPRINTF_CUSTOM
-        #define LV_SPRINTF_INCLUDE  "stdio.h"
-        #define lv_snprintf         snprintf
-        #define lv_vsnprintf        vsnprintf
-    #endif
-
-#endif

zephyr/module.yml

@@ -0,0 +1,2 @@
+build:
+  cmake: .