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tic: Add I²C support for Tic Stepper Motor Controllers (#78)
* tic: Add I²C support for Tic Stepper Motor Controllers (#1)
* Initialise buffers as arrays instead of slices
* Remove redundant step modes and improve docs
* Make Offset type private
* Remove shadowed variable
nrzled.NewSPI: also add padding in the front (#48)
Some SPI devices take a while to set up for transfer, and while doing
so, show the first bit they're about to send.
This causes the first LED to always interpret the first symbol as a
logical 1. Zapping out the whole strip will leave the first LED green,
and the first pixel will always be slightly green-ish.
Prevent this, by applying the same 3 bit padding we have at the end to
the front.
Signed-off-by: Florian Klink <flokli@flokli.de>