how to add mcu to cmsis_mcu_descriptions.json5

[jancotipsarevic]

Hello, I am planing to use a board with STM32F103VGT6 but it is not listed in the cmsis_mcu_descriptions.json5 file and complains running cmake ..
"ERROR: Target specifies device_name STM32F103xG but this device is not
listed in C:\Mbed-CE\mbed-ce-hello-world\mbed-os\tools\cmake....\targets\cmsis_mcu_descriptions.json5. Perhaps you need to use
the 'python -m mbed_tools.cli.main cmsis-mcu-descr fetch-missing' command to download
the missing MCU description?"

How is the proper way to create this entry in the json5 file?

Thank you very much

[timIdeaTech]

As it happens, I ran into the the same issue yesterday too. As it turns out STM32L433CCTx doesn't exist in cmsis_mcu_descriptions.json5 either. I'm porting an old project from mbed-os to mbed-ce.

If I'm correct: the mbed-ce fork of mbed-os, mbed-os/targets/cmsis_mcu_descriptions.json5 is the same as the mbed-ce forked version of the legacy mbed-os/tools/arm_pack_manager/index.json. It would be easy to say we should just update cmis_mcu_descriptions.json5 in mbed-ce but it may not be that easy.

So I add to the question: can the above update be accomplished with out breaking something or is there a way to add to the mcu descriptions, at least temporarily, using let's say the custom_target or some other method similar to the mbed_disable_mcu_target_file() cmake call for source files?

[jancotipsarevic]

Sorry, now works, thank you very much.

[timIdeaTech]

@multiplemonomials

You might be wondering why I'm looking at this. It has to do with porting a the legacy mbed-os bootloader project, which as far as I can determine isn't supported by by mbed-ce. Feel free to correct me if I'm wrong.

That's really awesome to hear! I would love to see a return of the bootloader project to Mbed. This is actually a significant reason why I added the memory banks feature in the first place: I wanted to restore the ability to configure the flash area so that Mbed CE could properly coexist with a bootloader. Unfortunately there are still a lot more linker script updates to do before that can happen though.

I actually ran into #305 while looking at this and realized there is more to this than I expected. My questions stemmed from an attempt to provide a temporary but quick solution to the port of our legacy project to mbed-ce and see if and where we were going to run into issues any other issues.

I also ran into various comments about MCUboot maybe being a better option than the mbed-os bootloader. Is there a consensus on which method the mbed-ce will gravitate too?

[JohnK1987]

@jancotipsarevic

Sorry, now works, thank you very much.

Do not worry, that is why we have discussions here.

@timIdeaTech I appreciate your activity here and do not understand me wrong but maybe a new topic about the bootloader will be better place for discussion.

[JohnK1987]

I made small update of fetch_missing in cmsis_mcu_descr.py. It is able help also with custom targets now - #394

[timIdeaTech]

@JohnK1987
No worries. Related but yes a new, #305 or other discussion thread. I wandered because of the memory_banks link to what I was trying to quickly accomplish.