Preprocess lvgl.h on Makefile, and allow overriding macros with LV_CFLAGS. Build and register ESP32 driver and ESP32-ILI9341 driver in ESP32 Makefile. Update lv-bindings sub module. Updated README with make command line and ESP32 example.

README.md

@@ -15,8 +15,13 @@ Please set `ESPIDF` parameter for the esp-idf install dir.
 It needs to match Micropython expected esp-idf, otherwise a warning will be displayed (and build will probably fail)
 For more details refer to [Setting up the toolchain and ESP-IDF](https://github.com/littlevgl/lv_micropython/blob/master/ports/esp32/README.md#setting-up-the-toolchain-and-esp-idf)
 
-For example:
+When using IL9341 driver, the width height and color need to be set to match ILI9341. This can be done from the command line.
-`make -C ports/esp32/ ESPIDF=~/esp/projects/lv_mpy_deps/esp-idf`
+Here is the command to build ESP32 + LittlevGL which is compatible with ILI9341 driver:
+
+`make -C ports/esp32/ ESPIDF=~/esp/projects/lv_mpy_deps/esp-idf -j4 LV_CFLAGS="-DLV_HOR_RES=240 -DLV_VER_RES=320 -DLV_COLOR_DEPTH=16" deploy`
+
+This make command will create ESP32 port of Micropython, and will try to deploy it through USB-UART bridge.
+`LV_CFLAGS` are used to override width height and color, for ILI9341 compatibility.
 
 ## Super Simple Example
 
@@ -52,6 +57,25 @@ indev_drv.read = SDL.mouse_read;
 lv.indev_drv_register(indev_drv);
 ```
 
+Here is an alternative example, for registering ILI9341 drivers on Micropython ESP32 port:
+
+```python
+# Import ESP32 driver (advnaces tick count and schedules tasks)
+
+import lvesp32
+
+# Import ILI9341, initialize it and register it to LittlevGL
+
+import ILI9341 as ili
+d = ili.display(miso=5, mosi=18, clk=19, cs=13, dc=12, rst=4, backlight=2)
+d.init()
+disp_drv = lv.disp_drv_t()
+lv.disp_drv_init(disp_drv)
+disp_drv.disp_flush = d.flush
+disp_drv.disp_fill = d.fill
+lv.disp_drv_register(disp_drv)
+```
+
 Now you can create the GUI itself
 
 ```python

lib/lv_bindings

@@ -1 +1 @@
-Subproject commit c60795596686072f0b28e794af6b1685115cbf86
+Subproject commit a62689186c2e67fa145601565ff13af328310641

lib/lv_conf.h

@@ -39,8 +39,13 @@
  *===================*/
 
 /* Horizontal and vertical resolution of the library.*/
+#ifndef LV_HOR_RES          
 #define LV_HOR_RES          (440)
+#endif
+
+#ifndef LV_VER_RES
 #define LV_VER_RES          (340)
+#endif
 
 /* Dot Per Inch: used to initialize default sizes. E.g. a button with width = LV_DPI / 2 -> half inch wide
  * (Not so important, you can adjust it to modify default sizes and spaces)*/
@@ -108,7 +113,10 @@
 #define LV_INDEV_LONG_PRESS_REP_TIME    100                    /*Repeated trigger period in long press [ms] */
 
 /*Color settings*/
+#ifndef LV_COLOR_DEPTH
 #define LV_COLOR_DEPTH     32                     /*Color depth: 1/8/16/32*/
+#endif
+
 #define LV_COLOR_16_SWAP   0                      /*Swap the 2 bytes of RGB565 color. Useful if the display has a 8 bit interface (e.g. SPI)*/
 #define LV_COLOR_SCREEN_TRANSP        0           /*1: Enable screen transparency. Useful for OSD or other overlapping GUIs. Requires ARGB8888 colors*/
 #define LV_COLOR_TRANSP    LV_COLOR_LIME          /*Images pixels with this color will not be drawn (with chroma keying)*/

ports/esp32/Makefile

@@ -197,6 +197,12 @@ LIB_SRC_C += \
 	lib/oofatfs/option/unicode.c
 endif
 
+ifeq ($(MICROPY_PY_LVGL), 1)
+LIB_SRC_C += \
+	lib/lv_bindings/driver/esp32/modlvesp32.c \
+	lib/lv_bindings/driver/esp32/modILI9341.c
+endif
+
 DRIVERS_SRC_C = $(addprefix drivers/,\
 	bus/softspi.c \
 	dht/dht.c \

ports/esp32/mpconfigport.h

@@ -180,6 +180,8 @@ extern const struct _mp_obj_module_t mp_module_machine;
 extern const struct _mp_obj_module_t mp_module_network;
 extern const struct _mp_obj_module_t mp_module_onewire;
 extern const struct _mp_obj_module_t mp_module_lvgl;
+extern const struct _mp_obj_module_t mp_module_lvesp32;
+extern const struct _mp_obj_module_t mp_module_ILI9341;
 
 #define MICROPY_PORT_BUILTIN_MODULES \
     { MP_OBJ_NEW_QSTR(MP_QSTR_esp), (mp_obj_t)&esp_module }, \
@@ -210,6 +212,8 @@ extern const struct _mp_obj_module_t mp_module_lvgl;
     { MP_OBJ_NEW_QSTR(MP_QSTR_time), (mp_obj_t)&utime_module }, \
     { MP_OBJ_NEW_QSTR(MP_QSTR_zlib), (mp_obj_t)&mp_module_uzlib }, \
     { MP_OBJ_NEW_QSTR(MP_QSTR_lvgl), (mp_obj_t)&mp_module_lvgl }, \
+    { MP_OBJ_NEW_QSTR(MP_QSTR_lvesp32), (mp_obj_t)&mp_module_lvesp32 }, \
+    { MP_OBJ_NEW_QSTR(MP_QSTR_ILI9341), (mp_obj_t)&mp_module_ILI9341 }, \
 
 #define MP_STATE_PORT MP_STATE_VM
 

py/py.mk

@@ -124,13 +124,16 @@ LVGL_BINDING_DIR = $(TOP)/lib/lv_bindings
 LVGL_DIR = $(LVGL_BINDING_DIR)/lvgl
 INC += -I$(LVGL_DIR) -I$(LVGL_BINDING_DIR)/include
 ALL_LVGL_SRC = $(shell find $(LVGL_DIR) -type f) $(TOP)/lib/lv_conf.h
+LVGL_PP = $(BUILD)/lvgl/lvgl.pp.c
 LVGL_MPY = $(BUILD)/lvgl/lv_mpy.c
 QSTR_GLOBAL_DEPENDENCIES += $(LVGL_MPY)
+CFLAGS_MOD += $(LV_CFLAGS) 
 
 $(LVGL_MPY): $(ALL_LVGL_SRC) $(LVGL_BINDING_DIR)/gen/gen_mpy.py 
 	$(ECHO) "LVGL-GEN $@"
 	$(Q)mkdir -p $(dir $@)
-	$(Q)$(PYTHON) $(LVGL_BINDING_DIR)/gen/gen_mpy.py -X anim -X group -X task $(INC) -I $(LVGL_BINDING_DIR)/pycparser/utils/fake_libc_include $(LVGL_DIR)/lvgl.h > $@
+	$(Q)$(CPP) $(LV_CFLAGS) $(INC) -I $(LVGL_BINDING_DIR)/pycparser/utils/fake_libc_include $(LVGL_DIR)/lvgl.h > $(LVGL_PP)
+	$(Q)$(PYTHON) $(LVGL_BINDING_DIR)/gen/gen_mpy.py -X anim -X group -X task -E $(LVGL_PP) $(LVGL_DIR)/lvgl.h > $@
 
 CFLAGS_MOD += -Wno-unused-function
 SRC_MOD += $(subst $(TOP)/,,$(shell find $(LVGL_DIR) -type f -name "*.c") $(LVGL_MPY))