fix(build): enable LV_CONF_PATH option

This allows to set custom `lv_conf.h` file per board
in `mpconfigboard.(h,cmake)`

micropython.cmake

@@ -17,6 +17,9 @@ idf_build_set_property(COMPILE_OPTIONS "-Wno-unused-function" APPEND)
 idf_build_set_property(SRCS "${LV_SRC}" APPEND)
 idf_build_set_property(INCLUDE_DIRS "${LV_INCLUDE}" APPEND)
 
+# DEBUG LV_CONF_PATH
+message(STATUS "LV_CONF_PATH=${LV_CONF_PATH}")
+
 # Fix for idf 5.2.x
 idf_build_get_property(component_targets __COMPONENT_TARGETS)
 string(REPLACE "___idf_lvgl" "" component_targets "${component_targets}")
@@ -45,12 +48,18 @@ target_compile_options(lvgl_interface INTERFACE ${LV_CFLAGS})
 add_library(usermod_lvgl INTERFACE)
 target_sources(usermod_lvgl INTERFACE ${LV_SRC})
 target_include_directories(usermod_lvgl INTERFACE ${LV_INCLUDE})
-
+if (DEFINED LV_CONF_DIR)
+    target_include_directories(usermod_lvgl INTERFACE ${LV_CONF_DIR})
+endif()
 
 file(WRITE ${LV_MP} "")
 
 target_link_libraries(usermod_lvgl INTERFACE lvgl_interface)
 
 # # # make usermod (target declared by Micropython for all user compiled modules) link to bindings
 # # # this way the bindings (and transitively lvgl_interface) get proper compilation flags
+if (DEFINED LV_CONF_DIR)
+    target_include_directories(usermod INTERFACE ${LV_CONF_DIR})
+endif()
+target_compile_options(usermod INTERFACE -DLV_CONF_PATH=${LV_CONF_PATH})
 target_link_libraries(usermod INTERFACE usermod_lvgl)

micropython.mk

@@ -8,11 +8,17 @@ LVGL_BINDING_DIR := $(USERMOD_DIR)
 LVGL_DIR = $(LVGL_BINDING_DIR)/lvgl
 LVGL_GENERIC_DRV_DIR = $(LVGL_BINDING_DIR)/driver/generic
 
+ifeq ($(LV_CONF_PATH),)
+LV_CONF_PATH = $(LVGL_BINDING_DIR)/lv_conf.h
+endif
+$(info    LV_CONF_PATH is $(LV_CONF_PATH))
+CFLAGS_USERMOD += "-DLV_CONF_PATH=<$(LV_CONF_PATH)>"
+
 ifeq ($(wildcard $(LVGL_DIR)/.),,)
 $(info lvgl submodule not init)
 else
 # This listing of all lvgl src files is used by make to track when the bindings need to be regenerated
-ALL_LVGL_SRC = $(shell find $(LVGL_DIR) -type f -name '*.h') $(LVGL_BINDING_DIR)/lv_conf.h
+ALL_LVGL_SRC = $(shell find $(LVGL_DIR) -type f -name '*.h') $(LV_CONF_PATH)
 endif
 
 LVGL_PP = $(BUILD)/lvgl/lvgl.pp.c

mkrules_usermod.cmake

@@ -5,6 +5,13 @@ find_program(AWK awk mawk gawk)
 
 set(LV_BINDINGS_DIR ${CMAKE_CURRENT_LIST_DIR})
 
+# first check
+if(NOT DEFINED LV_CONF_PATH)
+    set(LV_CONF_PATH ${LV_BINDINGS_DIR}/lv_conf.h)
+
+    message(STATUS "LV_CONF_PATH=${LV_CONF_PATH}")
+endif()
+
 # Common function for creating LV bindings
 
 function(lv_bindings)
@@ -25,13 +32,15 @@ function(lv_bindings)
         OUTPUT 
             ${LV_PP}
         COMMAND
-        ${CMAKE_C_COMPILER} -E -DPYCPARSER ${LV_COMPILE_OPTIONS} ${LV_PP_OPTIONS} "${LV_CFLAGS}" -I ${LV_BINDINGS_DIR}/pycparser/utils/fake_libc_include ${MICROPY_CPP_FLAGS} ${LV_INPUT} > ${LV_PP}
+        ${CMAKE_C_COMPILER} -E -DPYCPARSER -DLV_CONF_PATH=${LV_CONF_PATH} ${LV_COMPILE_OPTIONS} ${LV_PP_OPTIONS} "${LV_CFLAGS}" -I ${LV_BINDINGS_DIR}/pycparser/utils/fake_libc_include ${MICROPY_CPP_FLAGS} ${LV_INPUT} > ${LV_PP}
         DEPENDS
             ${LV_INPUT}
             ${LV_DEPENDS}
             ${LV_BINDINGS_DIR}/pycparser/utils/fake_libc_include
         IMPLICIT_DEPENDS
             C ${LV_INPUT}
+        COMMENT
+            "LV_BINDINGS CPP"
         VERBATIM
         COMMAND_EXPAND_LISTS
     )
@@ -60,6 +69,9 @@ function(lv_bindings)
                 ${AWK} ${LV_AWK_COMMAND} ${LV_PP} > ${LV_PP_FILTERED}
             DEPENDS
                 ${LV_PP}
+
+            COMMENT
+                "LV_BINDINGS: FILTER"
             VERBATIM
             COMMAND_EXPAND_LISTS
         )
@@ -71,10 +83,13 @@ function(lv_bindings)
         OUTPUT
             ${LV_OUTPUT}
         COMMAND
-            ${Python3_EXECUTABLE} ${LV_BINDINGS_DIR}/gen/gen_mpy.py ${LV_GEN_OPTIONS} -MD ${LV_MPY_METADATA} -E ${LV_PP_FILTERED} ${LV_INPUT} > ${LV_OUTPUT} || (rm -f ${LV_OUTPUT} && /bin/false)
+            ${Python3_EXECUTABLE} ${LV_BINDINGS_DIR}/gen/gen_mpy.py ${LV_GEN_OPTIONS} -DLV_CONF_PATH=${LV_CONF_PATH} -MD ${LV_MPY_METADATA} -E ${LV_PP_FILTERED} ${LV_INPUT} > ${LV_OUTPUT} || (rm -f ${LV_OUTPUT} && /bin/false)
         DEPENDS
             ${LV_BINDINGS_DIR}/gen/gen_mpy.py
             ${LV_PP_FILTERED}
+
+        COMMENT
+            "LV_BINDINGS GEN MPY"
         COMMAND_EXPAND_LISTS
     )
 
@@ -95,7 +110,7 @@ function(all_lv_bindings)
 
     # LVGL bindings
 
-    file(GLOB_RECURSE LVGL_HEADERS ${LVGL_DIR}/src/*.h ${LV_BINDINGS_DIR}/lv_conf.h)
+    file(GLOB_RECURSE LVGL_HEADERS ${LVGL_DIR}/src/*.h ${LV_CONF_PATH})
     lv_bindings(
         OUTPUT
             ${LV_MP}