I'm trying to upgrade lvgl from 7.6.1 to 8.0 but I have faced some issue

How-to
1

I use zephyr RTOS and work on STM32F429 board.
as you guys know, lvgl 7.6.1 version is migrated in zephyr(2.6.99).
so, I try to upgrade lvgl library from 7.6.1 to 8.0 referencing below url

step 1. copy lvgl(8.0) to zephyrproject/modules/lib/gui folder
step 2. copy lv_conf_template.h which is in lvgl(8.0) to this path (zephyrproject/zephyr/lib/gui/lvgl) and change the file name to lv_conf.h
step 3. change to #if 1 in lv_conf.h
step 4. fix build error building test application.

so. I success the build and flash binary my board ( stm32F429… )

but I had faced below error.

[00:00:00.131,000] 31m os: ***** USAGE FAULT *****
[00:00:00.131,000] 31m os: Illegal use of the EPSR
[00:00:00.131,000] 31m os: r0/a1: 0x20018420 r1/a2: 0x200183e8 r2/a3: 0x080280f6
[00:00:00.131,000] 31m os: r3/a4: 0xfffffffe r12/ip: 0x00000000 r14/lr: 0x0800538d
[00:00:00.131,000] 31m os: xpsr: 0x60000000
[00:00:00.131,000] 31m os: Faulting instruction address (r15/pc): 0x080280f6
[00:00:00.131,000] 31m os: >>> ZEPHYR FATAL ERROR 0: CPU exception on CPU 0
[00:00:00.131,000] 31m os: Current thread: 0x20000230 (unknown)
[00:00:00.187,000] 31m os: Halting system

currently, I have no idea what I should do.
please give me an opinion to solve this issue.

Thanks

2

Did you make the necessary driver changes (most importantly, changing them to static or something which will not go out of scope)?

4

Thanks for commment.
From the migration guide, I did do it like below.

  • lv_disp_drv_t, lv_indev_drv_t, lv_fs_drv_t needs to be static
  • ...disp_buf... is renamed to draw_buf. See an initialization example

Is there anything I missed?

5

Opps. I have solved this one. when I ran the below command. the change which I modified some variable to be static in driver level was removed.

git checkout -f ( -_-)a
I added this change again and it works well. lol

thanks for reminding me
Best Regards