Drv::ByteStreamBufferAdapter

1. Introduction

The Drv::ByteStreamBufferAdapter is a passive component that serves as an adapter between two different driver interfaces in F´:

1. The ByteStreamDriver interface, which is used for sending and receiving streams of bytes
2. The PassiveBufferDriver interface, which is used for sending and receiving Fw::Buffer objects

This adapter component allows components that expect a PassiveBufferDriver interface to communicate with components that provide a ByteStreamDriver interface, bridging the gap between these two different models of data transfer.

2. Requirements

Name	Description	Validation
DRV-BSB-ADAPTER-001	The component shall adapt the ByteStreamDriver interface to the PassiveBufferDriver interface	Unit Test
DRV-BSB-ADAPTER-002	The component shall handle buffer ownership transfers between the two interfaces	Unit Test
DRV-BSB-ADAPTER-003	The component shall monitor the ByteStreamDriver readiness state	Unit Test
DRV-BSB-ADAPTER-004	The component shall emit events on error conditions	Unit Test

3. Design

3.1 Assumptions

The design of ByteStreamBufferAdapter assumes the following:

1. The byte stream driver will properly signal ready status before accepting data.
2. Buffer ownership follows the standard Return-To-Sender pattern: buffers are owned by the receiver until returned.
3. The byte stream driver operates correctly and returns buffers sent to it when it is done processing.

3.3. State

The component maintains a single state variable:

• m_driverIsReady: An atomic boolean that tracks whether the ByteStreamDriver is ready to receive data. Initialized to false and set to true when a ready signal is received from the driver.