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I've modified the optimized 8-bit version of the AdafruitTFTLIB for teensy 3.1 if anyone is interested. it uses one contiguous GPIO port for the data pins

The ATSHA204 package I'm using only supports the single wire interface. I haven't played around with getting the io working a week or so, but will tonight. I'm going to adjust that library to use GPIO port manipulation directly, or digitalwrite fast.

Not sure if this a bug, or PEBCAK... I'm trying to use this library on Teensy 3.1 [https://github.com/jimblom/sha204-Breakout] to communicate with an ATSHA204 [https://www.sparkfun.com/products/11551] that uses a single wire interface. The library uses bitbanging to affect the protocol. For...