Multiple LVGL projects in a single codebase

[bonnee]

In order to handle multiple displays, I'm trying to include two LVGL projects in a single codebase. I'm running into several issues related to how code is generated.

I'd love to be able to generate non conflicting code that could be included in a project without introducing conflicts

I unsuccessfully tried to modify the code templates to differentiate between names, but the ${eez-studio} macros don't follow the new naming scheme.

[squix78]

I solved this problem with name spaces in the generator templates:

namespace system_ui {
    //${eez-studio LVGL_SCREENS_DECL}
    //${eez-studio LVGL_SCREENS_DECL_EXT}
}

in your own code you reference the objects like this:
system_ui::objects

[zalexzperez]

I also need this feature.
Since I'm using Platformio, I think I could achieve this by creating two separate EEZ Studio projects and merge them in my code using Platformio's environments.

So, in my platformio.ini file I would have something like:

[env:IPC-rev3]
build_flags = 
	${env.build_flags}
	-DHW_MODEL='"IPC"'
	-DHW_MODEL_IPC
	-DHW_REVISION=3
	-DFW_VERSION='"0.1.1"'

And in my code, I would include the appropriate files using conditional macros:

#ifdef HW_MODEL_IPC
#include "ui/variants/ipc/vars.h"
#include "ui/variants/ipc/structs.h"
#include "ui/variants/ipc/screens.h"
#endif

Haven't really tried it yet.

[bonnee]

I solved it by editing the files in eez studio directly. I am now able to use a single project with multiple displays. Here are some steps:

Edit screens.c

Add a modified version of the create_screens() function. Manually add a call to create_screen_<screen_name> for each screen (here i have 4 screens: left_boot, left_normal, right_boot, right_normal, each assigned to the left and right displays).

void create_screens_mod(){
    lv_disp_t *dispp = lv_disp_get_next(NULL);
    lv_disp_set_default(dispp);

    lv_theme_t *theme = lv_theme_default_init(dispp, lv_palette_main(LV_PALETTE_BLUE), lv_palette_main(LV_PALETTE_RED), true, LV_FONT_DEFAULT);
    lv_disp_set_theme(dispp, theme);
    create_screen_left_boot();
    create_screen_left_normal();   
    
    dispp = lv_disp_get_next(dispp);
    lv_disp_set_default(dispp);

    theme = lv_theme_default_init(dispp, lv_palette_main(LV_PALETTE_BLUE), lv_palette_main(LV_PALETTE_RED), true, LV_FONT_DEFAULT);
    lv_disp_set_theme(dispp, theme);
    create_screen_right_boot();
    create_screen_right_normal();   
}

Add call to previous function in ui.c

Substitute the default ui_init function with the following:

void ui_init() {
    create_screens_mod();
//${eez-studio LVGL_LOAD_FIRST_SCREEN}
}