Trait spectrusty::peripherals::bus::zxinterface1::SerialPortDevice

pub trait SerialPortDevice {
    type Timestamp: Sized;

    fn write_data(
        &mut self,
        rxd: DataState,
        timestamp: Self::Timestamp
    ) -> ControlState;
    fn poll_ready(&mut self, timestamp: Self::Timestamp) -> ControlState;
    fn update_cts(&mut self, cts: ControlState, timestamp: Self::Timestamp);
    fn read_data(&mut self, timestamp: Self::Timestamp) -> DataState;
    fn next_frame(&mut self, eof_timestamp: Self::Timestamp);
}

An interface for emulating communication between a ZX Spectrum’s hardware port and remote devices.

Emulators of peripheral devices should implement this trait.

Methods of this trait are being called by bus devices implementing serial port communication.

Required Associated Types

type Timestamp: Sized

Required Methods

fn write_data(
    &mut self,
    rxd: DataState,
    timestamp: Self::Timestamp
) -> ControlState

A device receives a current RxD state from Spectrum and should output a DTR line state.

This method is being called when a CPU writes (OUT) to a port and only when the CTS line isn’t changed by the write.

fn poll_ready(&mut self, timestamp: Self::Timestamp) -> ControlState

This method is being called once every frame, near the end of it, and should return a DTR line state.

fn update_cts(&mut self, cts: ControlState, timestamp: Self::Timestamp)

Receives an updated CTS line state.

This method is being called when a CPU writes (OUT) to a port and only when the value of CTS changes.

fn read_data(&mut self, timestamp: Self::Timestamp) -> DataState

Should return a TxD line state.

This method is being called when a CPU reads (IN) from a port.

fn next_frame(&mut self, eof_timestamp: Self::Timestamp)

Called when the current frame ends to allow emulators to wrap stored timestamps.

Implementors

impl<T> SerialPortDevice for NullSerialPort<T>

type Timestamp = T

impl<T> SerialPortDevice for SerialKeypad<T>where
    T: TimestampOps,

type Timestamp = T

impl<T, R, W> SerialPortDevice for Rs232Io<T, R, W>where
    T: TimestampOps,
    R: Read,
    W: Write,

type Timestamp = T