libraries: add lvgl

Add lvgl library to no-os

Signed-off-by: Robert Budai <robert.budai@analog.com>

Author: rbudai98

.gitmodules

@@ -16,3 +16,6 @@
 [submodule "libraries/free_rtos/free_rtos"]
 	path = libraries/free_rtos/free_rtos
 	url = https://github.com/FreeRTOS/FreeRTOS-Kernel.git
+[submodule "libraries/lvgl/lvgl"]
+	path = libraries/lvgl/lvgl
+	url = https://github.com/lvgl/lvgl.git

libraries/lvgl/lvgl

@@ -120,6 +120,12 @@ INCS += $(NO-OS)/libraries/lwip/configs/lwipcfg.h
 INCS += $(NO-OS)/libraries/lwip/configs/lwipopts.h
 endif
 
+# Add LVGL library
+ifneq ($(if $(findstring lvgl, $(LIBRARIES)), 1),)
+include $(NO-OS)/tools/scripts/lvgl.mk
+endif
+
+
 LIB_TARGETS			+= $(IIO_LIB) $(MBEDTLS_LIBS) $(FATFS_LIB) $(MQTT_LIB) $(AZURE_LIBS)
 EXTRA_LIBS_NAMES	= $(subst lib,,$(basename $(notdir $(EXTRA_LIBS))))
 LIB_FLAGS			+= $(addprefix -l,$(EXTRA_LIBS_NAMES))

tools/scripts/libraries.mk

@@ -0,0 +1,13 @@
+LVGL_PATH = $(NO-OS)/libraries/lvgl/lvgl
+CFLAGS += -DLV_CONF_INCLUDE_SIMPLE
+
+include $(LVGL_PATH)/lvgl.mk
+include $(LVGL_PATH)/component.mk
+
+LVGL_HEADER_PATH = $(LVGL_PATH)/src
+CFLAGS += -DLV_CONF_PATH=$(PROJECT)/lv_conf.h
+SRCS += $(wildcard $(LVGL_HEADER_PATH)/*.c)
+
+COMPONENT_SRCDIRS := $(addprefix $(LVGL_PATH)/, $(COMPONENT_SRCDIRS))
+INCS += $(foreach dir,$(COMPONENT_SRCDIRS),$(wildcard $(dir)/*.h))
+SRCS += $(foreach dir,$(COMPONENT_SRCDIRS),$(wildcard $(dir)/*.c))