Implementation of embedded_hal::digital::IoPin

[MorganR]

This is just a draft, and is pending the PR merge of an IoPin implementation into embedded_hal.

I've verified it with a no-std DHT11 driver based on the IoPin PR.

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[MorganR]

This has been updated to match the definition of IoPin as merged in embedded_hal PR 269.

[MorganR]

Hey folks, I've added a commit to remove the try_ prefixes so this can build against the embedded-hal HEAD. Would you rather merge it like this, or wait until embedded-hal pushes the next alpha release?

[eldruin]

Thanks! It would be better only to depend on released versions of embedded-hal.

[eldruin]

@MorganR Could you update this PR now that I updated this repository to embedded-hal 1.0.0-alpha.5?

[MorganR]

Absolutely, I'll update it by the end of the weekend

[bors[bot]]

Build succeeded:

• CI (1.46.0, x86_64-unknown-linux-gnu)
• CI (stable, armv7-unknown-linux-gnueabihf)
• CI (stable, x86_64-unknown-linux-gnu)

[eldruin]

@MorganR FYI this is published as part of the 0.4.0-alpha.1 release.