I would like to share what I think is a very slick programming technique that both the Arduino development team as well as Arduino users may well be interested in -- Achieving very high performance pin I/O. Fortunately, this issue is not new and searches in the Forum has turned up quite a few hit…

Super High Performance Pin I/O Technique

system April 3, 2014, 4:03am 4

If I want to do direct bit manipulation, I just use assembler.

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