Marvell无线微控制器SDK 3.2快速入门指南

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Marvell Wireless Microcontroller Software Development Kit (SDK) 3.2 Quick Start Guide是一份专为Marvell无线微控制器设计的开发工具文档，于2015年8月24日发布，具有机密性和专有信息性质。这份指南旨在帮助开发者快速上手Marvell的无线解决方案，提供了软件开发所需的基础配置、安装步骤和关键功能介绍。该指南的核心内容包括： 1. **软件开发概述**：介绍了SDK的主要目标和优势，强调了Marvell如何致力于提供更快的移动前行技术，表明其产品在性能、可靠性和效率方面的领先地位。 2. **版权与许可**：明确声明未经Marvell书面许可，不得复制或通过任何形式（电子或机械，如复印）传播文档内容。Marvell保留随时更新文档的权利，并且不提供任何明示或默示的保修。 3. **文档规范**：文档中采用不同的图标和提示（如“Caution”、“Warning”），指导用户注意潜在的硬件损坏风险、软件问题或数据丢失的可能性，提醒开发者在操作时谨慎对待。 4. **安全注意事项**：文档强调遵循安全措施，可能涉及敏感信息处理，开发者需要遵守相关规定以保护系统和个人安全。 5. **获取更多信息**：鼓励读者访问Marvell官方网站（www.marvell.com）获取更全面的产品支持、教程和最新更新。 6. **文档版本控制**：注明文档尚未得到文档控制部门的批准，这意味着可能还存在未公开的变更或优化。 7. **文档日期**：标明了最后的更新日期，确保开发者使用的是最新版本的SDK，以便获得最佳开发体验。通过阅读这份Quick Start Guide，开发者可以了解如何高效地集成Marvell无线微控制器到他们的项目中，包括设置环境、编写代码、调试以及解决可能出现的问题。它是一个必备的参考资源，对于任何希望利用Marvell无线技术的开发团队来说，是实现项目成功的关键第一步。

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Wireless Microcontroller - Software Development Kit 3.2

Quick Start Guide

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August 24, 2015, Doc Status

Not Approved by Document Control. For Review Only.

The device and the AP then perform the negotiation, and follow a defined process. The

end result of the process is that the device gets the configuration of the target Wi-Fi

network. While this method is the easiest, not all APs may support this mechanism

because of some known security issues. This method can be used along with the Marvell

Provisioning method defined below to address this problem.

1.3.2.2 HTTP/HTTPS Web Server

The WMSDK includes a HTTP Web Server. This server has been designed to work with all the

commonly available browsers on most platforms. The web server has the following features:

1. Serve Files: The webserver can serve HTML/JS files to connected clients. These files

can be stored on the flash of the device. Application developers can create web apps that

can provide the end-users with meaningful workflows. Such web applications are useful

since they allow the end-user to start interact with the device without having them to

install any application on their systems. A collection of files from the given folder is

bundled up to create an FTFS image. This FTFS image is then flashed along with the

MCU firmware. Note that the FTFS is read-only file system. No files can be

added/updated.

2. Caching Support: WMSDK web server includes partial support of RFC 7234 standard

for HTTP caching. This enables developers to use this feature to speed up page loading

times for the end user.

3. Web Server Gateway Interface: The applications can write custom WSGI handlers

associated with specific URIs. Applications register with the web server to get a callback

for specific paths and HTTP methods GET, POST, PUT and DELETE. This allows

applications to expose rich functionality through web APIs. This can be used to create

RESTful web services for e.g.

The WSGI handlers are provided with the entire environment in which the HTTP request

is received along with any data that was part of the HTTP request. Utility functions are

available to be used by WSGI handlers for quick development of data processing

functionality, be it in the form or URL-encoded parameters, HTTP form data or POST

data in the body of the request. Functions are also available for the WSGI handlers to

generate the different HTTP response codes, encodings and data formats.

4. HTTP Secure (https): With appropriate configuration, the HTTP server also can serve

content on a TLS connection i.e. https over port 443.

5. HTTP Persistent Connections and Pipelining: Multiple simultaneous open connections

are supported and appropriate context is provided for each open socket connection,

1.3.2.3 Filesystem (FTFS)

The Flash Table File System (FTFS) is a read-only flash filesystem used to store static content to

be served by the web server. Other applications can also use FTFS to store permanent

configuration data The FTFS exposes standard file handling APIs viz. fopen, fread, ftell, fclose,

etc.

1.3.2.4 Secure Boot

The 88MW300’s BootROM can load images that are encrypted (AES-CCM) and/or signed (RSA).

The SDK support a trusted chain of booting such that:

a. The BootROM can decrypt and/or verify the boot2 boot-loader (AES-CCM-256 / RSA-2048)

b. The boot-loader can decrypt and/or verify the microcontroller firmware (AES-CTR-128 / RSA-

2048)

c. The Microcontroller firmware can store encrypted values into the PSM (AES-CTR-128)

d. Additionally, support is also available for locking out JTAG and disabling other boot options

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MARVELL INTERNAL USE ONLY

1.3.2.5 HTTP/HTTPS Web Client

The HTTP web client module allows applications to perform HTTP operations like GET, POST,

etc. on any webserver. Following are the list of features in this module:

 HTTPS

 Transparent generation of HTTP request headers and parsing the response.

 Support partial support of Keep Alive mechanism allowing persistent connections.

 Interleaved operation for faster data transfer in cases of persistent connections.

 Transparent handling of chunked encoded data for GET operations.

 Chunked write

1.3.2.6 WebSockets

The HTTP Web Client module, mentioned above, enables a device to communicate with cloud

servers. The HTTP protocol being is a request-response protocol, may not be suitable for certain

kind of applications that require instantaneous notifications on either end. The WMSDK also has

implementation of the WebSockets protocol. The WebSockets protocol enables full-duplex

communication of data frames over the HTTP protocol.

The sample applications also include a sample cloud server that is implemented using Web

Sockets.

1.3.2.7 Bonjour/multicast Domain Name System (mDNS)

The WMSDK supports service discovery and announcement using mDNS. The mDNS module can

be used as a responder, or a querier or both. Bonjour being an implementation of Zeroconf

network, this is very useful to setup a network with minimal configuration. Dynamic ecosystems of

heterogeneous devices can be built using this platform.

 Responder: As a responder, this module can be used to announce services that this

WMSDK device offers over the network. Other entities on the network can discover who

offers certain services. The responder also responds to hostname lookup requests. This

enables end-users to access devices using hostnames instead of IP addresses.

 Querier: As a querier, this module can be used to lookup services on the network that

the WMSDK device is interested in. Once services are discovered these services can be

accessed to build an ecosystem of multiple devices working together.

1.3.2.8 Over The Air (OTA) Upgrades

The WMSDK includes field-validated support for firmware and filesystem (FTFS) upgrades. The

upgrades can be performed over the local network (HTTP POST) or remotely through the cloud

(HTTP GET). Using a fail-safe active-passive partition mechanism ensures that the WMSDK

devices continue to stay up and functional even across failure events such as network loss or

others.

The boot2 boot-loader ensures that it always boots into the latest upgraded firmware on the

system. In case it detects any errors with this firmware, it falls back to boot from the older firmware

partition.

Similarly, the MCU firmware uses the latest and the compatible filesystem and Wi-Fi firmware

images from flash.

Wireless Microcontroller - Software Development Kit 3.2

Quick Start Guide

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Document Classification: Proprietary Information

August 24, 2015, Doc Status

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1.3.2.9 Persistent Storage Manager (PSM)

The PSM module provides a way for applications to read or store persistently name-value pairs on

flash. The persistent information could be configuration related, like the target Wi-Fi network’s

settings, or any other state of the WMSDK device. Following are the features:

 One-level deep namespace for variable names.

 Binary values are supported.

 Specially designed to be run over flashes. It uses a special algorithm to avoid excessive

erasing of flash sectors thus significantly prolonging the usable life of the flash device.

 Power resiliency. It uses reserved sectors to ensure that ever if power fails during write

operation, existing variables are safe from corruption. This handling is transparent to user

of PSM.

 Read only mode of operation. This allows user to store key value pairs permanently. This

is useful to store factory data that is preserved across reset-to-factory scenarios.

 Multiple instances of PSM module can be run simultaneously to allow multiple separate

PSM storage areas on the same device.

To provide the power resiliency feature, the PSM reserves some flash sectors for recovery. Thus,

PSM requires at least two (2) sectors to work unless run in read-only mode. The number of

reserved sectors among the given sectors is managed automatically.

Note that the above features are part of newer version of PSM (PSMv2). The older version of

PSM, which was part of earlier releases has been replaced with PSMv2. The API compatibility

layer is present to map from older API’s to newer API’s. The full features of PSMv2 can be used

only if newer API’s are used.

The older PSM can be manually enabled if necessary for any reason. It is not recommended as it

has high probability of failing in cases of power failures.

1.3.2.10 DHCP Server

When the WMSDK device hosts its own network using micro-AP, the DHCP server is responsible

for dynamically assigning IP Addresses to the Wi-Fi clients that connect to this micro-AP.

Features:

 DHCP dynamic allocation.

 DHCP caches mappings and preferentially assigns same IP address a client previously

had during renewal.

 No persistent storage of mappings. Mapping cache is refreshed after reboot of device.

1.3.2.11 JSON / XML

The WMSDK also includes modules for parsing as well as generating data in the JSON

(JavaScript Object Notation) or XML (Extensible Markup Language) formats.

1.3.2.12 Transport Layer Security (TLS & SSL)

WMSDK supports Transport Layer Security (TLS & SSL) by integrating the CyaSSL library. This

enables support for all of the SSL/TLS family protocols, viz, SSLv2, SSLv3, TLSv1.0 TLSv1.1 and

TLSv1.2. Following are some of the features present:

 Key Exchanges: RSA, DH, EDH and NTRU

 Data Encryption/Decryption: DES, 3DES, AES, ARC4, RABBIT, HC-128

 Message Authentication Code: MD-2/4/5, SHA-1/2/256/512, RIPEMD-169

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Additionally, X.509 v3 certificate support is included. The support for all of the above is available in

client as well as server mode.

Note that WMSDK release comes along with binary only commercial release of CyaSSL. Libraries

and header files are provided.

Please refer to README from CyaSSL folder for more information.

1.3.2.12.1 Feature Packs

The TLS libraries are included as multiple feature packs within the WMSDK. Since the footprint

impact is high, customers can choose the appropriate feature-footprint tradeoffs out of these

feature packs. For example the FP3 feature pack provides a high-security low-footprint TLS library.

Details about the exact set of features within the feature packs are available at: cyassl-feature-

packs/feature-packs-matrix.xls within the WMSDK tarball.

All the feature packs are available in the cyassl-feature-packs/ directory. For selecting a feature

pack, pass the appropriate feature pack option to the build command. For example:

$ cd wmsdk_bundle-x.y.z

$ make CYASSL_FEATURE_PACK=fp0

$ make CYASSL_FEATURE_PACK=fp0_debug

If you prefer a debug feature pack, apart from passing the appropriate option, please also set the

following build configuration: Development and Debugging



Enable Debugging Output



Transport Layer Security and the build configuration: Modules



TLS



Enable CyaSSL Debug

1.3.2.13 Application Framework

The SDK is equipped with a feature-rich application framework that simplifies application

development. The application framework builds on top of the SDK core-runtime and the

middleware modules, and implements the state machine that addresses the most common use-

cases required by most applications. The application developers can choose the scenario best

suited for their model, thus enabling application developers to focus on the core components

specific to their application.

1.3.2.14 Command Line Interface

The command line module allows applications to add own commands to aid development process.

Numerous existing commands allows the developer to control and observe existing modules like

WLAN connection manager, PSM, FTFS, etc. The user and extend this by adding own commands

using the command line module. Please refer to cli.h documentation from WMSDK reference

module and sample applications for example usage.

1.3.3 Sample Applications

The WMSDK bundle contains a rich set of sample applications that can be used to either

understand the WMSDK features, or as a starting point to build production applications from.

1.3.4 Development Tools

To work with the SDK, you will require at a minimum, an ARM compiler toolchain. Please refer to

the Developer Host Setup document for details. Linux, Windows and Mac host environments are

officially supported.

Additional tools needed for development are all bundled with the SDK. These include:

 A build framework to build all of the SDK components that are delivered in source form,

and to build your own application software and custom firmware images.

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Marvell无线微控制器SDK 3.2快速入门指南

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