add(lpc55):gpio and alarm support

[genan2003]

Pull Request Overview

This commit introduces the initial Alarm driver for the NXP LPC55 series microcontroller. The driver provides the foundational API for configuring and managing Alarm functionality.

Testing Strategy

This pull request was tested by blinking and LED from the board(flashing the blink example from libtock-c)

TODO or Help Wanted

This pull request still needs...

Documentation Updated

• Updated the relevant files in /docs, or no updates are required.

Formatting

• Ran make prepush.

[alexandruradovici]

Looks good, please add a Readme.md to each new crate.

[genan2003]

Looks good, please add a Readme.md to each new crate.

Done.

[alexandruradovici]

Please fix the pipeline errors.

[genan2003]

Please fix the pipeline errors.

Done. The pipeline with nb dependency fails, probably from the cortex_m_semihosting, but when we will remove it will not fail.

[alexandruradovici]

There should be no external dependencies.

[genan2003]

There should be no external dependencies.

I removed all external dependencies.

[genan2003]

@alexandruradovici why is not good to use the target thumbv8m.main-none-eabihf since the kernel compiles and the examples form libtock-c are working good?

[alexandruradovici]

The hf means that it might use hardware floating point, which not supported by the kernel. If the compiler inserts and floating point, the context switch will fail.

[genan2003]

The hf means that it might use hardware floating point, which not supported by the kernel. If the compiler inserts and floating point, the context switch will fail.

Ok, that makes sense.

[alexandruradovici]

I added some images that point out the difference in exception handling.

[genan2003]

I added some images that point out the difference in exception handling.

Now I see the problem of using the hf target. We can encounter other problems when we are using it.

[genan2003]

@alexandruradovici what do I have to do next?

[alexandruradovici]

Did you delete the hf?

[genan2003]

Did you delete the hf?

Yes, I deleted it. Also, I make the modification in the .cargo folder of the board in order to use the target without hf.

[alexandruradovici]

You can open the PR to upstream.

[genan2003]

@alexandruradovici can you, please, approve this PR in order to send the PR to upstream? I deleted some comments and the initial approve was dismissed.