topic Re: Gui-Guider Aircon samples Application built for zephyr in GUI Guider

Gui-Guider Aircon samples Application built for zephyr

RafalHalik — Fri, 15 Mar 2024 15:02:08 GMT

Hey,

While working with the NXP Gui Guider I've come across this strange issue where the generated code cant be built for zephyr due to an extra parameter in lv_animing_set_src. I am not sure when this had changed or if its an error with the code generator but a few weeks ago the generated code worked for me.

Gui-Guider:

version used: GUI-Guider-1.7.0-GA

LVGL Version 8.3.10 selected

Target board (i.MX RT) MIMXRT1060_EVKB

Aircon Application selected to use as template

Zephyr workspace:

LVGL ver: 8.3.11

Zephyr ver: 3.6.99

Generated C code for this template

Exported code for zephyr

In File: setup_scr_ui_Aircon.c

96 | lv_animimg_set_src(ui->ui_Aircon_aircon_fan, (const void **) ui_Aircon_aircon_fan_imgs, 6, false);

Fails due to the extra paramter passed, "false" the last paramter which isnt required in this function call.

When i remove the extra paramter from the function call it seems to work as long as i add a blank "lv_font.h" file into the guider_customer_fonts directory

Is this a bug or am I missing something?

Re: Gui-Guider Aircon samples Application built for zephyr

EdwinHz — Thu, 21 Mar 2024 19:57:27 GMT

Hi @RafalHalik,

From the Animation Image API for v8.3 (Animation Image (lv_animimg) — LVGL documentation), the function "lv_animimg_set_src()" only has 3 parameters:

That said, code that GUI Guider generates adds a 4th parameter to this function as a 'reverse parameter':

This allows GUI Guider to control the direction of flow of the animation with a simple switch:

Ironically, this extra parameter is not meant to be a bug, but rather a feature...

However, as I mentioned before, LVGL doesn't natively have this "feature". This can be proved by creating a project from scratch in MCUXpresso and adding the LVGL middleware afterwards. In other words, create an LVGL project outside of GUI Guider. Doing this resulted in a "lv_animimg_set_src()" function without the reverse feature, and followed the normal API description:

In conclusion, the extra parameter is added by GUI Guider as a feature, but your Zephyr workspace probably already had the LVGL middleware with the "normal" 3 parameter lv_animimg_set_src() function rather than the 4 parameter one that GUI Guider generates. deleting this extra parameter is enough to have the example work, as you mention, but you could also just add the "reverse" if-else condition that GUI Guider creates for this function and this way any GUI Guider project that uses an animated image will work on your Zephyr workspace.

I hope this helps!

BR,
Edwin.

Re: Gui-Guider Aircon samples Application built for zephyr

RafalHalik — Mon, 25 Mar 2024 09:15:05 GMT

Hey @EdwinHz

Ah I see must of missed that. Well that's good to know thankyou for your time and great answer, very detailed!