a software driver to the RS8234, on top of which a

system designer can develop and place proprietary

driver software. This interface allows users to

easily port their applications to the RS8234EVM.

This software is written in C, and source code

is available under license agreement.

The RS8234EVM also includes documentation,

a full set of design schematics, and artwork for

the RS8234EVM PCI card.

RS823xHPI Hardware

Programming Interface

The RS8234 Hardware Programming Interface

(HPI) provides a set of fully-defined software

primitives to interface with an ATM UNI port

based on the RS8234 SAR. It serves as an interface

point for system software designed to configure

and manage the RS8234-based UNI without the

necessity of detailed manipulation of hardware-

related structures. It thus provides a layer of

abstraction from the hardware for the system

designer and user.

RS8234HPI primitives are used by higher-level

application software (such as network management

and device drivers) to obtain ATM services as

required by their upper protocol layers. These

primitives handle SAR resource, control and status

management. The RS823xHPI performs functions

in the following categories:

• RS8234 SAR device initialization

• Memory resource allocation

• Resource management

• Connection management (including VCC

setup and teardown, and processing status)

• Segmentation/data transmission

• Data reception/reassembly

• Statistics gathering/error reporting

• Diagnostic testing

Benefits

Shortens development time of customer system-specific ATM applications.

Allows users to utilize only those functions they want and to incorporate those functions into their

own applications.

Users can establish ABR, CBR, UBR or VBR connections at VCC setup on each of over 32,000 channels.

Provides detailed examples for control and management of the RS8234. Significantly shortens design time.

Enables users to easily port their application to the RS8234EVM.

Gives users a clear description of how the software and hardware function.

Offers a layer of abstraction for ease of use of the RS823xHPI primitives.

Reference device driver for VxWorks.

Features

Software reference design

Modular software design

Dynamic rate control per virtual channel

SAR initialization and VCC control

Well-defined, robust RS823xHPI interface

Well-documented C source code

RS823xHPI macro layer software