EFR32 Zigbee 3.0 SDK: Advanced API for Stack and HAL Programming

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本资源是一份详细介绍如何使用Ember ZNet API进行高级应用编程的文档，针对的是基于EFR32平台的Zigbee 3.0网络。这份名为"UG105 ADVANCED APPLICATION PROGRAMMING WITH THE STACK AND HAL APIs"的手册主要针对那些需要访问除Ember AppBuilder和应用程序框架之外的功能，或者更倾向于直接与API交互的开发者。新版本文档的特点包括重新编号和更详尽的内容。章节1，"Introduction"，介绍了文档的目的，即帮助开发者理解如何在EFR32上构建功能丰富的Zigbee 3.0网络应用，包括获取帮助的方式。接下来的章节深入探讨了API的组织结构、命名规范、文件和目录结构，以及网络的初始化、操作和组建过程。 - 在"Stack Initialization"部分，开发者需了解如何配置底层栈以支持网络通信。 - "Network Operation"涉及网络活动的管理和控制，如节点的加入、网络的安全设置等。 - "Packet Buffers"部分解释了地址表或绑定表的管理，这对于高效的数据传输至关重要。 - "Sending and Receiving Messages"章节详细讲解了消息发送和接收的方法，包括路由机制和处理大型网络通信的技术。 - "Key Aggregation-Related APIs"部分关注密钥聚合相关的接口，确保数据安全。 - 对于边缘设备（End Devices）的处理，文档也提供了指导。 - "Security and Trust Center"强调了网络安全和信任管理的重要性。 - "Event Scheduling"部分则讨论了如何有效地安排和处理应用程序中的事件。此外，"Application Design"部分深入探讨了应用设计的基本原则，包括设计模式和最佳实践，帮助开发者创建稳定、高效的Zigbee 3.0应用程序。这部分强调了应用设计的灵活性和功能性需求，旨在帮助开发者在实际项目中实现高级功能。这份文档是EFR32 Zigbee 3.0环境下使用Ember ZNet API进行复杂应用开发的宝贵参考资料，覆盖了从底层栈配置到高级应用设计的全方位指导。无论是初学者还是经验丰富的开发者，都能从中找到所需的技术细节和策略。

UG105

Note: EmberZNet PRO does not have different stack libraries for ZigBee controller (ZC) and ZigBee Router (ZR)

devices, so any device that calls emberFormNetwork() creates the network and becomes the ZC. As such,

only the device starting the network should call emberFormNetwork(), and other devices should call

emberJoinNetwork(), which is described below.

The ZC can then use emberPermitJoining() to allow joining, subject to the configured security settings:

emberPermitJoining(60); // Permit joining for 60 seconds

emberPermitJoining(0xFF); // Permit joining until turned off

emberPermitJoining(0); // Do not permit joining

For more information on security settings and authorization, please refer to document UG103.5, Ember Application

Development Fundamentals: Security.

2.4.4 Joining a Network

Joining a network is accomplished with the emberJoinNetwork() API:

status = emberJoinNetwork(EMBER_ROUTER, &networkParams); // To join as a ZR

status = emberJoinNetwork(EMBER_SLEEPY_END_DEVICE, &networkParams); // To

join as a Sleepy ZED

status = emberJoinNetwork(EMBER_MOBILE_END_DEVICE, &networkParams); // To

join as a Mobile ZED

The networkParams variable is a structure of type EmberNetworkParameters and configures the PAN-ID, extended

PAN-ID (or 0 for any), channel of the network to join, and the desired TX power with which to join the network.

Silicon Labs also provides a utility function that uses

emberStartScan(), emberStopScan(), and

emberScanCompleteHandler() to discover networks that match the provided options and to join the first

one that it finds:

// Use a function from app/util/common/form-and-join.c

// that scans and selects a beacon that has:

// 1) allow join=TRUE

// 2) matches the stack profile that the app is using

// 3) matches the extended PAN ID passed in unless "0" is passed

// Once a beacon match is found, emberJoinNetwork is called.

joinZigbeeNetwork(EMBER_ROUTER, EMBER_ALL_802_15_4_CHANNELS_MASK,

-1, (int8u*) extendedPanId);

The utility emberFindandRejoinNetwork() is used on devices that have lost contact with their network and

need to scan and rejoin.

2.5 Packet Buffers

The EmberZNet PRO stack provides a full set of functions for managing memory. This memory is statically

allocated at link time, but dynamically used during run time. This is a valuable mechanism because it allows you to

use statically linked, fixed-length buffers for variable-length messages. This also gives you a better idea of how

much RAM your software will require during run time.

6 Rev. 0.4

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