Sienda Time Sensitive Network Stack

_{^{Updated March 2023. Content subject to change. Copyright (c) 2023 Sienda Multimedia Ltd. All rights reserved.}}

Introduction

The Sienda Time Sensitive Network Stack is a software library written in C++ that provides full protocol support for the IEEE Time Sensitive Networking (TSN) standards defined in IEEE 802.1BA.

It can be used to implement Audio Video Bridging (AVB) or TSN endpoints, and supports the following standards:

• gPTP (802.1AS)
• MAAP: MAC Address Acquisition Protocol (1722-2016 Annex B)
• MRP: Multiple Registration Protocol (802.1Q)
  • MVRP: Multiple VLAN Registration Protocol
  • MSRP: Multiple Stream Registration Protocol
  • MMRP: Multiple MAC Registration Protocol
• AVBTP: AVB Transportation Protocol (1722-2016)
• AVDECC: Audio Video Discovery Enumeration Connection and Control (1722.1-2013)
• RSTP: Rapid Spanning Tree Protocol (802.1Q-2014)

The library can be deployed on a variety of architectures, including ARM Cortex M MCUs, Cortex A MPUs, and desktop environments (OSX, Windows, Linux). The library is portable and should build on any system with a C++14 compliant compiler, (double) floating point support and 64 bit integer (uint64_t) support.

The library is fully encapsulated and interfaces with an application (and hardware) via a well defined API. While the library provides the majority of the processing and protocol handling required by an AVB endpoint, the application must interface with the hardware and provide the following services:

• Timer services
• Ethernet packet handling
• Audio services
• Persistent storage (if Milan compliance is required)

The library provides full AVDECC 1722.1 support. The entity model may be described by an XML file or a binary file.

Resources

• Architecture Guide The Architecture Guide details the hardware requirements of an AVB endpoint, and how the hardware and firmware interacts with the Sienda TSN Stack.

• Programming Guide The Programming Guide details everything you need to know to develop firmware for a TSN audio endpoint using the Sienda TSN Stack.

• API Reference Doxygen docs for the Stack API.

Example Reference Designs

Various reference AVB endpoints with AVB/MILAN firmware are available from Sienda. Firmware images are available to evaluate performance, and full source code is available to licencees of the Sienda TSN stack. All designs use off-the-shelf evaluation boards to reduce cost and enable customers to get started straight-away. This means that clock recovery, persistent storage, and multiple talker streams are not supported in all cases, due to external component requirements.

Eval Board	Silicon	Brief	Documentation
	STM32F429 Nucleo-144 (STM32F4)	Low-cost solution Up to 32 audio channels (STM32H7) RTOS	STM32 Nucleo EP
	Beagleboard X15 TI AM5728	Mid-tier solution Up to 128 audio channels RTOS / Linux Additional DSP	X15 EP
	ADI EV-SC598 (ADI ADSP-SC598)	Mid-tier solution Up to 128 audio channels RTOS / Linux Additional DSP	ADSP-SC598 EP
	Adlink I-Pi SMARC (Intel Elkhart Lake)	Mid-tier solution >128 audio channels Linux Additional processing	ElkhartLake EP