Module digital

Digital I/O.

Enums

• ErrorKind
  Error kind.
• PinState
  Digital output pin state.

Traits

• Error
  Error.
• ErrorType
  Error type trait.
• InputPin
  Single digital input pin.
• OutputPin
  Single digital push-pull output pin.
• StatefulOutputPin
  Push-pull output pin that can read its output state.