Use rzCOBS encoding

[eupn]

Obvious in a hindsight, but works perfectly fine with a 0xFF as a sentinel byte.

Closes #12.
Related defmt-persist-print PR: https://github.com/eupn/defmt-persist-print/1.

P.S.: tested in hardware, works fine!

[MathiasKoch]

I somehow missed this PR.. Think i accidentally unwatched my own repo, sorry about that!

But AWESOME work! I think you need to disable the std feature on rzCOBS?

[eupn]

@MathiasKoch std is used for decoding during testing (see dev-dependencies section). Not sure why it's being used during the build. On the other hand, it's working in my firmware when defmt-persist crate is used as a dependency.

[MathiasKoch]

Hmm.. Not sure why the tests fail then?

[MathiasKoch]

@eupn Can you merge master into this?

[eupn]

@MathiasKoch rebased on the latest master.

[MathiasKoch]

Hmm.. still seems to fail?

[eupn]

@MathiasKoch, I think this rust-lang/cargo#1596 is related to this issue with CI builds.

P.S.: people have similar issues here rafalh/rust-fatfs#39 with std dev-dependency pulled in when building for no_std target.

[eupn]

@MathiasKoch seems that feature resolver v2 fixes the issue.

[MathiasKoch]

Ahh perfect! Great catch 👍