arm设备驱动-阿里云

ARM嵌入式学习笔记——《设备驱动基础》（三）

linux内核GPIO操作库函数1.明确：“GPIO操作”:ARM处理器引脚具有复用功能,使用前记得先配置为GPIO功能一旦配置为GPIO功能,即可输入或者输出操作GPIO操作又分：输入操作和输出操作“输入操作”：此GPIO引脚的电平由外设来决定“输出操作”: 此GPIO引脚的电平由CPU来决定“库...

ARM嵌入式学习笔记——《设备驱动基础》（二）

Linux内核程序的命令传递参数明确：要想给Linux内核传递参数，必须遵循以下三个原则：接收参数的内核变量必须是全局变量。内核变量：此变量定义在内核空间，也就是此变量定义在内核程序内，也就是此变量的地址一定位于0xC0000000~0xFFFFFFFF.接收参数的内核全局变量的数据类型一定是以下类...

ARM嵌入式学习笔记——《设备驱动基础》（一）

Linux设备驱动基础明确：Linux系统的两个空间：用户态（用户空间）和内核态（内核空间）。推荐：《Unix环境高级编程》第三版《Linux设备驱动程序》第三版《Linux内核设计与实现》第三版用户空间的特点用户空间包含的软件就是各种应用程序（ls/cd/,）ÿ...

[arm驱动]Platform设备驱动

Tip:红色字体为简要部分《[arm驱动]Platform设备驱动》涉及内核驱动函数五个，内核结构体三个，分析了内核驱动函数四个；可参考的相关应用程序模板或内核驱动模板零个，可参考的相关应用程序或内核驱动二个想了解platform总线管理方式的原理参考[arm驱动]Platform总线原理前...

基于ARM的嵌入式Linux移植真实体验（4）――设备驱动

基于ARM的嵌入式Linux移植真实体验（4）――设备驱动宋宝华[email]21cnbao@21cn.com[/email] 出处:dev.yesky.com 设备驱动程序是操作系统内核和机器硬件之间的接口，它为应用程序屏蔽硬件的细节，一般来说，Linux的设备驱动程序需要完成如下功能...

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更新时间 2024-02-29 10:46:41

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