Trait Transport 

pub trait Transport {
    type Error;

    // Required methods
    async fn read_holding(
        &mut self,
        offset: u16,
        out: &mut [u16],
    ) -> Result<(), Self::Error>;
    async fn read_input(
        &mut self,
        offset: u16,
        out: &mut [u16],
    ) -> Result<(), Self::Error>;
    async fn read_coils(
        &mut self,
        offset: u16,
        out: &mut [bool],
    ) -> Result<(), Self::Error>;
    async fn read_discrete(
        &mut self,
        offset: u16,
        out: &mut [bool],
    ) -> Result<(), Self::Error>;
    async fn write_holding(
        &mut self,
        offset: u16,
        regs: &[u16],
    ) -> Result<(), Self::Error>;
    async fn write_coil(
        &mut self,
        offset: u16,
        on: bool,
    ) -> Result<(), Self::Error>;

    // Provided method
    fn max_read_words(&self) -> u16 { ... }
}

Async register-level transport. offset is the zero-based data-model offset within the given address space (spec §7.2); implementations apply any unit/base-address mapping.

Required Associated Types

type Error

Required Methods

async fn read_holding( &mut self, offset: u16, out: &mut [u16], ) -> Result<(), Self::Error>

async fn read_input( &mut self, offset: u16, out: &mut [u16], ) -> Result<(), Self::Error>

async fn read_coils( &mut self, offset: u16, out: &mut [bool], ) -> Result<(), Self::Error>

async fn read_discrete( &mut self, offset: u16, out: &mut [bool], ) -> Result<(), Self::Error>

async fn write_holding( &mut self, offset: u16, regs: &[u16], ) -> Result<(), Self::Error>

async fn write_coil(&mut self, offset: u16, on: bool) -> Result<(), Self::Error>

Provided Methods

fn max_read_words(&self) -> u16

Largest register window one read may request (Modbus caps at 125; devices sometimes less). The facade chunks larger spans.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors