HUB75 example using lcd_cam

[liebman]

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Submission Checklist 📝

• I have updated existing examples or added new ones (if applicable).
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Pull Request Details 📖

I'm (ab)using the lcd peripheral to drive a hub75e led matrix and found that after a send is complete line are all set low. I need one of the pins to remain high between calls.

Description

I've added a "with_options(invert_bits) to the TxEightBits and TxSixteenBits implementations to allow any/all bits to be set to inverted. Also consolidated the pin configuration into a macro as its 24 of almost the same code.

Testing

Run on an esp32s3 and reviewed logic analyzer output.

[liebman]

I'm still struggling on how to make the pins optional to TxSixteenBits and TxEightBits. I think this is useful as is. The example shows how to display on a HUB75 display using the lcd_cam peripheral. If someone has ideas on making pins optional here I'm all ears.

[liebman]

So AnyPin::new_inverted() works and helms with issues of the type signature. Closing - with create a separate PR with the example.