Trait UartAddress 

pub unsafe trait UartAddress {
    // Required methods
    unsafe fn write(&self, register: WriteableRegister, value: u8);
    unsafe fn read(&self, register: ReadableRegister) -> u8;
}

Represents an address type for a UART device, allowing idiomatic access to register addresses, and allowing any number of constraints to be encoded based on the hardware implemenation of the UART IO (whether port or memory mapped).

Safety

• The type implementing this trait should only be constructed with a valid UART base address (this may be a safety invariant on an unsafe fn constructor).

Required Methods

unsafe fn write(&self, register: WriteableRegister, value: u8)

Writes value to register.

Safety

• Writing value to the provided register has the potential to change the value of other registers. For instance, writing FifoControl::CLEAR_TX will change the contents of (in this case, zero out) WriteableRegister::TransmitterHolding.

unsafe fn read(&self, register: ReadableRegister) -> u8

Reads a raw u8 from register.

Safety

• Reading a value from certain registers will affect the contents of others. For instance, reading the line status will always clear the InterruptStatus::INTERRUPT_PENDING bit. Because of this, any calling context that passes ReadableRegister::LineStatus should be &mut self, or otherwise exclusively alias the address that is being read from.

Implementors

impl UartAddress for MmioAddress

impl UartAddress for PortAddress