Android hal-阿里云

Android HAL深入探索(7)hidl-gen和hidl2aidl的使用详解

前言 Android系统开发中硬件抽象层（HAL），它是一组接口和数据类型的定义，用于描述硬件设备的功能和属性，从而实现硬件和软件的解耦。为了方便使用HAL，Android提供了一种专门的语言，叫做HIDL，它是一种基于IDL（接口定义）的语言，可以用于定义HAL接口和数据类型，并生成不同语言和类型...

Android HAL深入探索(5): 调试HAL报错与解决方案

在我们学习Android HAL开发时，可能会遇到一些编译或运行时的错误，这些错误可能会影响探索脚本。为了有效地定位和解决这些错误，需要了解Android HAL的架构、工具和方法。本文将介绍一些我自己在学习Android HAL的调试技巧和常见错误的解决方案，希望能帮助到大家。网上其他文章从不会...

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Android HAL深入探索(1): 架构概述

在本文中，将深入学习了解Android HAL的不同方式和架构，以及它们之间的区别和联系。将从最早的Legacy HAL开始，然后从Android 8.0 (Oreo) 开始引入的新的HAL定义方式：HIDL (Hardware Interface Definition Language)。将比较H...

RK android13光感适配HAL层调用

@TOC 首先看\hardware\rockchip\sensor\st LightSensor.cpp 它里面有三个ioctl的调用 int32_t ret = ioctl(dev_fd, LIGHTSENSOR_IOCTL_GET_ENABLED, &flags); ret = ioct...

Android10.0(Q) HAL层 light2.0 改动记录及排错过程

LightsService 灯光服务提供了LCD背光灯、键盘灯、按键灯、警示灯、电池灯、消息通知灯、蓝牙灯、wifi灯等八种类型灯光；都是基于 android.hardware.light.V2_0.Type现有需求需要新增第九中类型灯光控制，找到定义 Type 的地方hardware\interf...

如何在Android中重建HAL？

我已经在device // manifest.xml中进行了更改，现在我只想重建boot.img和vendor.img。有什么方法/命令只能在android中构建HAL模块吗？谢谢

[android底层] hal硬件抽象层编写

两个与hal有关的结构体 hw_module_t ,hw_device_t 一、jni和hal之间的关系 Tip：几种app,jni,hal,framework之间的关系框架这篇文章用的框架是...

在Ubuntu上为Android增加硬件抽象层（HAL）模块访问Linux内核驱动程序

在Android硬件抽象层（HAL）概要介绍和学习计划一文中，我们简要介绍了在Android系统为为硬件编写驱动程序的方法。简单来说，硬件驱动程序一方面分布在Linux内核中，另一方面分布在用户空间的硬件抽象层中。接着，在Ubuntu上为Android系统编写Linux内核驱动程序一文中举例子说明了...

《Android深度探索（卷1）：HAL与驱动开发》虚拟实验环境（Ubuntu Linux）免费下载，不需要CPU虚拟化支持

由于有些同学安装随书光盘虚拟环境时发现CPU不支持虚拟化，所以我特意做了个不需要虚拟化的虚拟环境，使用Virtual Box，Ubuntu Linux10.04 LTS（4G左右）有需要的可以下载使用。该虚拟环境包含了书中所需的实验环境（除了And...

Android帧缓冲区（Frame Buffer）硬件抽象层（HAL）模块Gralloc的实现原理分析（4）

成员变量fd指向一个文件描述符，这个文件描述符要么指向帧缓冲区设备，要么指向一块匿名共享内存，取决于它的宿主结构体private_handle_t描述的一个图形缓冲区是在帧缓冲区分配的，还是在内存中分配的。 ...

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