嵌入式Linux内核与驱动开发指南

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嵌入式Linux内核与驱动开发是现代电子系统设计中的关键组件,尤其是在物联网(IoT)、消费电子产品和工业自动化等领域。本文档由Michael Opdenacker在2004-2005年间撰写,遵循GNU自由文档许可证,旨在提供关于嵌入式Linux内核与驱动开发的深入理解和实用指南。嵌入式Linux内核,作为轻量级且高度定制化的操作系统核心,允许设备在资源受限的环境中高效运行,而驱动程序则是这些硬件设备与操作系统之间通信的桥梁。 内核开发部分,作者强调了2.6版本的Linux内核在驱动移植中的重要性,这是由于其对硬件兼容性的改进和性能提升。Jonathon Corbet的新闻和文章对这一过程提供了极大的帮助,特别是关于驱动程序的移植和优化技术。 udev工具也在此文中得到了提及,这是Linux内核中用于自动配置设备的一种机制,通过udev规则匹配,可以简化设备驱动的安装和管理,减少了人为干预的需求。Greg Kroah-Hartman的贡献同样不可或缺,他的文章可能涵盖了udev的使用和最佳实践。 此外,作者还提到了OpenOffice.org项目提供的文档处理工具,它们满足了开发者在编写技术文档时的需求,体现了开源社区之间的协作与互助精神。Handhelds.org社区的支持者们给予了作者许多帮助,为驱动开发提供了实际操作的机会和平台。 对于那些帮助过作者的人,如Phil Blundell、Jeffery Huang、Mohit Mehta、Matti Aaltonen等,他们的专业知识和建议极大地推动了本文档的质量提升。整个开源社区的共享精神,包括工作成果、知识和友谊,都在这个过程中发挥了重要作用。 总结来说,这篇文档深入探讨了嵌入式Linux内核开发的基础原理,涵盖了内核架构、驱动程序编写技巧、以及如何利用开源工具如udev进行设备管理。它为想要在这个领域取得成功的技术人员提供了一个宝贵的资源,无论是新手入门还是经验丰富的开发者,都能从中受益匪浅。
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Linux Driver Development for Embedded Processors – Second Edition 版本: Learn to develop Linux embedded drivers with kernel 4.9 LTS The flexibility of Linux embedded, the availability of powerful, energy efficient processors designed for embedded computing and the low cost of new processors are encouraging many industrial companies to come up with new developments based on embedded processors. Current engineers have in their hands powerful tools for developing applications previously unimagined, but they need to understand the countless features that Linux offers today. This book will teach you how to develop device drivers for Device Tree Linux embedded systems. You will learn how to write different types of Linux drivers, as well as the appropriate APIs (Application Program Interfaces) and methods to interface with kernel and user spaces. This is a book is meant to be practical, but also provides an important theoretical base. More than twenty drivers are written and ported to three different processors. You can choose between NXP i.MX7D, Microchip SAMA5D2 and Broadcom BCM2837 processors to develop and test the drivers, whose implementation is described in detail in the practical lab sections of the book. Before you start reading, I encourage you to acquire any of these processor boards whenever you have access to some GPIOs, and at least one SPI and I2C controllers. One of the boards used to implement the drivers is the famous Raspberry PI 3 Model B board. You will learn how to develop drivers, from the simplest ones that do not interact with any external hardware, to drivers that manage different kind of devices: accelerometers, DACs, ADCs, RGB LEDs, Multi-Display LED controllers, I/O expanders, and Buttons. You will also develop DMA drivers, drivers that manage interrupts, and drivers that write/read on the internal registers of the processor to control external devices. To easy the development of some of these drivers, you will use different types of Frameworks: Miscellaneous framework, LED framework, UIO framework, Input framework and the IIO industrial one. This second edition has been updated to the v4.9 LTS kernel.