Build lv_bindings with micropython nightly for ESP32

Micropython
1

Been trying to figure out for a few days how to get lv_bindings to compile with the latest micropython as it includes a feature I need that the stable 1.19.1 does not. It looks like the makefile has changed some and I am unable to get LVGL to be recognized as a module. Has anyone else been able to compile with with nightly micropython?

Edit: Specifying ESP32 port.

2

Hi @demitrix
See this related PR: Integration as external c module with unmodified micropython. by andrewleech · Pull Request #242 · lvgl/lv_binding_micropython · GitHub

3

I’ve played around with this as well. Been having issues getting to compile as well. However it seems like the path of least resistance, so I will try to keep moving forward with it. Thanks.

This is as far as I’ve managed to get with compiling as an external usermod

CMake Error at /project/micropython/py/usermod.cmake:9 (get_target_property):
  get_target_property() called with non-existent target "lvgl_interface".
Call Stack (most recent call first):
  /project/micropython/py/usermod.cmake:24 (usermod_gather_sources)
  /project/micropython/py/usermod.cmake:24 (usermod_gather_sources)
  /project/micropython/py/usermod.cmake:47 (usermod_gather_sources)
  main/CMakeLists.txt:14 (include)


CMake Error at /project/micropython/py/usermod.cmake:15 (get_target_property):
  get_target_property() called with non-existent target "lvgl_interface".
Call Stack (most recent call first):
  /project/micropython/py/usermod.cmake:24 (usermod_gather_sources)
  /project/micropython/py/usermod.cmake:24 (usermod_gather_sources)
  /project/micropython/py/usermod.cmake:47 (usermod_gather_sources)
  main/CMakeLists.txt:14 (include)


CMake Error at /project/micropython/py/usermod.cmake:21 (get_target_property):
  get_target_property() called with non-existent target "lvgl_interface".
Call Stack (most recent call first):
  /project/micropython/py/usermod.cmake:24 (usermod_gather_sources)
  /project/micropython/py/usermod.cmake:24 (usermod_gather_sources)
  /project/micropython/py/usermod.cmake:47 (usermod_gather_sources)
  main/CMakeLists.txt:14 (include)


Found User C Module(s): usermod_lv_bindings, lvgl_interface
CMake Error at /project/esp-idf/tools/cmake/component.cmake:470 (add_library):
  add_library cannot create target "__idf_main" because another target with
  the same name already exists.  The existing target is a static library
  created in source directory
  "/project/micropython/ports/esp32/main".  See
  documentation for policy CMP0002 for more details.
Call Stack (most recent call first):
  main/CMakeLists.txt:158 (idf_component_register)
4

I suggest you mention this on the github issue and continue the discussion there.
I think the work the for building lv_bindings on ESP32 as an external module was not completed yet, so it’s worth pinging the contributor.