Add support of STM32U0xx series

[doctek]

Board description (please complete the following information):

• Name: Generic STM32U073KB
• Link to all relevant information: Reference is to the STM data for the part. Nothing special here.
  • Documentations
  • Schematics
  • Where this hardware can be purchased

• ...

Note that user can add a STM32 based board following this wiki

Any contribution is welcome, so do not hesitate to submit a PR.

All new variant request will be moved to [New Variant] request list #722 and the related issue will be closed.

[fpistm]

Hi @doctek
Before adding the support of the generic STM32U073, the STM32U0xx series have to be added.

[doctek]

Thank you for your improvements to my request, fpistm! I appreciate it greatly.
Any idea on a time line for this?
Thanks!

[fpistm]

Hi @doctek
I've made a first part of the job this morning using a script dedicated to add new stm32 series.
I've got the Blink working on a Nucleo U083RC.
I will do the PR this afternoon for basic support feel free to test on your side and give your feedback.

[doctek]

This is amazing! I can' imagine how you were able to do this so quickly!!
Of course I will gladly test your work on my STM32U073KB. I've read the instructions on Using the GIT Repository and I'm pretty confident I can follow that. The only thing I'm not sure of is what version to clone. What is the new version number?
Thank you for your hard work and rapid response!

[fpistm]

You can fetch the PR or use my branch on my fork.

[doctek]

Obviously, I'm not the GIT pro that you are, so let me make my question very clear.
In the wiki entry for "Using git repository", Step 3 says I should clone the new version using this command:
git clone https://github.com/stm32duino/Arduino_Core_STM32.git
What should I put in for ?

Thanks, sorry for being stupid.

       -jim

[doctek]

Hmm. That last posting didn't come through very clearly. I'm very sorry for that, although I don't know exactly what caused it.
The wiki reference should have been git clone [https://] [github.com/] [stm32duino/Arduino_Core_STM32.git] [<[version]>]
Hopefully, I've broken the command up enough that it will post correctly.
My question is: What should I put in for [version]?

Thanks and sorry for messing up the last post and not noticing it!
-jim

[fpistm]

Hi @doctek
Sorry was OoO yesterday. Version is the cire version. So 2.8.1.

[doctek]

Following the instructions, I deleted the 2.8.1 files that I had and cloned the latest version.
When I started Arduino, I do not see any STM board choice that is for the U073. What am I missing?
Looking at the git files for 2.8.1, I don't see any reference to merging #2495. Makes ;me think that I am not cloning the correct version. Again, I'm not a git power user! Can you tell me what I'm doing wrong?
Thanks for your patience!
-jim

[fpistm]

PR #2495 is not merged.
As stated you can:

• Clone my fork and checkout my branch:
  https://github.com/fpistm/Arduino_Core_STM32/tree/STM32CubeU0_addition

• Fetch only the PR in the original repo. For this I have a git alias in my .gitconfig:

[alias]
    pr = "!f() { git fetch -fu ${2-origin} refs/pull/$1/head:pr/$1 && git checkout pr/$1; }; f"

when added you can simply do on the git repo:
git pr 2495

[doctek]

I'm trying real hard to follow your instructions.
Here's what I did. You'll have a good laugh at my git newbee errors!
First, I tried to clone your repository. I deleted 2.8.1 and issued this command:
git clone https://github.com/fpistm/Arduino_Core_STM32
I tried to clone the complete link you gave https://github.com/fpistm/Arduino_Core_STM32/tree/STM32CubeU0_addition, but that wouldn't work.
Then I modified the file .git/config to add the [alias] for pr.
Then I issued this command:
git pr 2495
Result:
fatal: couldn't find remote ref refs/pull/2495/head

I have no idea what to try next. Thank you for your patience.