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A comment on Programming ARM μC in Rust at four different levels of abstraction. Parent comment

Re:Programming ARM μC in Rust at four different levels of ab... by bleke on Thursday February 22, 2018 @03:58AM (#16436255)
As for input it can be always read to check real pin state, for example in open collector where 'high' value is determined by pull-up resistor, because microcontroller just make pin floating
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