Module tx_async 

Asynchronous TX support.

This module provides support for asynchronous non-blocking TX transfers.

It provides a static number of async wakers to allow a configurable amount of pollable TxFutures. Each UARTLite Tx instance which performs asynchronous TX operations needs to be to explicitely assigned a waker when creating an awaitable TxAsync structure. Retrieve the resulting TxToken via TxAsync::token right after construction and pass it to on_interrupt_tx from your interrupt handler.

The maximum number of available wakers is configured via the waker feature flags:

• 1-waker
• 2-wakers
• 4-wakers
• 8-wakers
• 16-wakers
• 32-wakers

Structs

InvalidWakerIndex

Invalid waker index for NUM_WAKERS.

TxAsync

Asynchronous TX driver.

TxContext

TX context structure.

TxFuture

TX future structure.

TxToken

Identifies a TxAsync driver’s UART instance and waker slot, e.g. for use in an interrupt handler.

Constants

NUM_WAKERS1-waker

1 waker (default).

Functions

on_interrupt_tx^⚠

This is a generic interrupt handler to handle asynchronous UART TX operations for a given UART peripheral.