Espidf lvgl how to use it

maxgerhardt · May 13, 2021, 8:23am

Ah, I just tried this and found a caveat that prevented it from working, at least for me.

lvgl/lvgl/blob/4f8e3a38b31a70b1e7d848e64845465b4e325897/CMakeLists.txt#L5-L7


      
          idf_component_register(SRCS ${SOURCES}
                                 INCLUDE_DIRS . src ../
                                 REQUIRES main)

the REQUIRES main had to be deleted, otherwise it would be giving me “failed to resolve component main” errors.

So, a standard project with Espressif32 Dev module + ESP-IDF + adding lvgl in the components/ folder makes the configuration appear in pio run -t menuconfig.

The src/main.c code

#include "lvgl.h"
void app_main() {
    
}

will initially show a include error at lvgl.h, but after one compilation, which is successfull, and a Ctrl+Shift+P → Rebuild IntelliSense it goes away.