Crash when calling init_all_themes() [mbed-os 5 bare-metal] about lv_demos HOT 5 CLOSED

Possibly. Can you use a debugger to find where it crashes?

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I am not sure, I guess there is a lot I need to learn. ST-Util debugger I use in VS Code is not helpful here. But I managed to decode crash info using this script I had to fix first. Maybe frame buffer is located where it should not be.

Crash Info:
        Crash location = __exidx_start [0xFFFFB0FE] (based on PC value)
        Caller location = __exidx_start [0xFFFFFFE9] (based on LR value)
        Stack Pointer at the time of crash = [2007FE00]
        Target and Fault Info:
                Processor Arch: ARM-V7M or above
                Processor Variant: C27
                MPU or Execute Never (XN) default memory map access violation on an instruction fetch has occurred

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Maybe you should try putting a breakpoint on main and stepping through the code (you can step over the initialization code and step into init_all_themes). The crash info your script decoded seems to be incorrect.

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@embeddedt Generally I know how to debug code. The problem was it was crashing for no apparent reason when just entering a function. I found the reason and described it here. Briefly, linker-reserved global vector table size was too small.

I am wondering how anyone could actually use mbed-os 5 with STM32F769.

Once I could debug the code I found the problem was I put DSI_IRQHandler in main.cpp file.
Some improvements are still required (e.g. in how lv_task_handler() and lv_tick_inc() are called) but it works!

Thanks for your willingness to help.

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Issue solved, problem was caused by a serious bug in mb-os 5: ARMmbed/mbed-os#12793

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