Module kernel::hil::spi::cs

Utility types for modeling chip select pins in a SpiMaster implementation.

Structs

• ChipSelectPolar
  A convenience wrapper type around Output GPIO pins that implements IntoChipSelect for both ActiveLow and ActiveHigh.

Enums

• ActiveHigh
  Marks a peripheral as requiring or controller as supporting active high chip select pins.
• ActiveLow
  Marks a peripheral as requiring or controller as supporting active low chip select pins.
• Polarity
  Represents the Polarity of a chip-select pin (i.e. whether high or low indicates the peripheral is active).

Traits

• ChipSelectActivePolarity
  Marker trait indicating whether a peripheral requires active high or low polarity as well as whether a SpiMaster implementation can support either or both polarities.
• IntoChipSelect
  A type that can be converted to the appropriate type for SpiMaster::ChipSelect for a particular POLARITY.