高通QMI架构_高通qmi资源-CSDN文库

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### 高通QMI架构详解 #### 一、引言 **高通QMI（Qualcomm MSM Interface）架构**是一种由高通公司开发的消息传递架构，用于实现主机系统与调制解调器系统之间的通信。它主要应用于移动通信领域，为手机和其他移动设备提供了高效的通信接口。本文档将详细介绍QMI架构的核心概念、组件及其工作原理。 ##### 1.1 目的本文档旨在介绍QMI架构的基本原理和技术细节，帮助开发者理解如何在不同的硬件平台上实现与调制解调器系统的有效通信。 ##### 1.2 范围本文档覆盖了QMI架构的主要方面，包括但不限于： - QMI框架概述 - 设备枚举过程 - 控制信道管理 - 数据传输机制 - 安全性和认证机制 ##### 1.3 公约本文档遵循以下约定： - 所有术语和缩写词首次出现时均给出全称。 - 特定技术术语将通过加粗字体突出显示。 - 关键步骤或注意事项将以列表形式呈现。 ##### 1.4 修订历史 - **版本1.0 (2006年8月8日)**：发布初始版本。 - 后续版本更新将根据技术进展和反馈进行调整。 ##### 1.5 参考资料 - [高通官方网站](https://www.qualcomm.com/) - [高通技术支持论坛](https://support.cdmatech.com/) ##### 1.6 技术支持对于本文档中未涉及的问题，开发者可以访问高通的技术支持网站获取进一步的帮助和支持。 ##### 1.7 缩略语 - **QMI**：Qualcomm MSM Interface - **MSM**：Mobile Station Modem - **TE**：Terminal Equipment - **API**：Application Programming Interface - **SDK**：Software Development Kit #### 二、QMI框架 QMI架构是高通公司在其调制解调器解决方案中采用的一种消息传递架构。该架构提供了一套标准的接口和协议栈，允许主机系统与调制解调器系统之间进行高效的数据交换。 ##### 2.1 MSM-TE互连 MSM-TE互连是指主机系统（通常指手机或其他终端设备的操作系统）与调制解调器系统之间的连接。这一互连通过物理层实现，如USB接口或串行接口等，并通过QMI协议栈来定义数据的格式和传输方式。 - **物理层**：负责数据的实际传输，包括信号的编码和解码。 - **数据链路层**：确保数据的可靠传输，处理错误检测和纠正。 - **应用层**：定义了高层协议，包括消息格式和控制指令。 ##### 2.2 逻辑设备枚举逻辑设备枚举是QMI架构中的一个重要组成部分，用于识别连接到调制解调器的各个逻辑设备。这些设备可能包括网络接口卡、存储设备或其他特定功能模块。枚举过程通常包括以下几个步骤： 1. **发现**：主机系统通过扫描连接接口来发现可用的逻辑设备。 2. **识别**：通过发送特定的查询命令来确定每个设备的功能和属性。 3. **配置**：基于设备的能力和需求对其进行配置。 4. **激活**：启动设备以便开始使用。 ##### 2.3 控制信道管理控制信道管理是QMI架构中另一个关键的部分，用于管理和维护主机系统与调制解调器之间的控制通信。这包括设置通信参数、监控连接状态以及执行诊断操作等。 - **控制命令**：用于配置调制解调器的各种设置。 - **事件报告**：调制解调器主动向主机报告状态变化或异常情况。 - **同步机制**：确保控制命令和事件报告的正确顺序和完整性。 #### 三、总结高通QMI架构为移动通信领域的开发者提供了一个强大的工具集，使得主机系统能够与调制解调器系统进行高效的数据交换。通过理解QMI框架的核心组件及其工作原理，开发者可以更好地设计和优化移动设备的通信性能，从而提升用户体验。随着5G等新技术的发展，QMI架构也在不断演进，以适应更高带宽和更低延迟的需求。

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QUALCOMM

Proprietary

Restricted Distribution: This document contains critical information about QUALCOMM products and may not be distributed

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Export of this technology may be controlled by the United States Government. Diversion contrary to U.S. law prohibited.

QUALCOMM Incorporated

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QUALCOMM

MSM™ Interface (QMI)

Architecture

80-VB816-1 A

August 8, 2006

Submit technical questions at:

https://support.cdmatech.com

80-VB816-1 A 2 QUALCOMM Proprietary

Contents

1 Introduction...................................................................................................... 5

1.1 Purpose................................................................................................................................ 5

1.2 Scope...................................................................................................................................5

1.3 Conventions......................................................................................................................... 5

1.4 Revision history................................................................................................................... 5

1.5 References ...........................................................................................................................6

1.6 Technical assistance ............................................................................................................ 6

1.7 Acronyms ............................................................................................................................ 6

2 QMI Framework................................................................................................ 7

2.1 MSM-TE interconnection.................................................................................................... 8

2.2 Logical device enumeration ................................................................................................ 9

2.3 Control channel messaging protocol ...................................................................................9

2.3.1 Endpoint model.....................................................................................................10

2.4 Usage................................................................................................................................. 10

3 QMI Multiplexing Protocol (QMUX) .............................................................. 11

3.1 Byte ordering.....................................................................................................................11

3.2 QMUX message format..................................................................................................... 11

3.2.1 QMUX version ..................................................................................................... 12

3.2.2 Multiplexing of QMI Services.............................................................................. 12

3.3 Rules for QMUX message handling..................................................................................13

3.3.1 Generating QMUX messages ............................................................................... 13

3.3.2 Receiving QMUX messages.................................................................................13

3.4 Client ID management....................................................................................................... 13

4 QMI Generalized Service Message Protocol ............................................... 14

4.1 Service PDU message format............................................................................................ 14

4.1.1 Byte ordering........................................................................................................ 14

4.1.2 QMI transaction structure.....................................................................................14

4.1.3 QMI message structure.........................................................................................16

4.1.4 QMI message parameter structure........................................................................ 16

4.1.4.1 Parameter types........................................................................................17

4.1.4.2 Parameter length ...................................................................................... 17

4.1.4.3 Parameter value........................................................................................ 17

QUALCOMM® MSM™ Interface (QMI) Architecture Contents

80-VB816-1 A 3 QUALCOMM Proprietary

4.2 QMI message types ........................................................................................................... 17

4.2.1 Request ................................................................................................................. 17

4.2.2 Response............................................................................................................... 17

4.2.3 Indication..............................................................................................................18

4.2.3.1 Unicast vs. broadcast indications............................................................. 18

4.3 Rules for transaction handling........................................................................................... 18

4.4 Rules for message handling............................................................................................... 19

4.4.1 General rules.........................................................................................................19

4.4.2 Generating requests .............................................................................................. 19

4.4.3 Receiving requests................................................................................................ 19

4.4.4 Generating responses............................................................................................ 19

4.4.5 Receiving responses .............................................................................................20

4.4.6 Generating indications..........................................................................................20

4.4.7 Receiving indications ...........................................................................................20

4.5 Rules for parameter handling ............................................................................................ 20

4.6 State variables.................................................................................................................... 21

4.7 Control Point arbitration.................................................................................................... 21

4.8 QMI Service versioning .................................................................................................... 22

4.8.1 Version format...................................................................................................... 22

4.8.2 Learning QMI Service versions............................................................................22

4.8.3 Service versioning rules........................................................................................ 22

4.8.3.1 Major versions .........................................................................................22

4.8.3.2 Minor versions......................................................................................... 22

4.8.4 Message and parameter updates ........................................................................... 23

剩余22页未读，继续阅读

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zuoluohust

2015-03-03

还不错，要是再详细一点就好了
永远的魔术1号

2014-01-29

高通官方文档，用处一般
wuguang0101

2013-06-14

刚开始接触这方面的东西，资料很少，这个可以初步了解一下
Tong_91

2017-06-26

很不错的资源，感谢!
恋着小桥流水

2014-03-21

适合初学者，后来在高通网站下的文档更详细，英文的

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swordfishzh

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