转载

Android驱动开发---Linux Kernel/HAL Layer/Jni Layer实例全集

本人在开发Android Nfc POS之初，探索调试了一番驱动，目前在Nexus 5X 7.1.1上已经调成，之前的步骤可以参考我发的文章，Android驱动开发经验分享如下。

1. Linux 内核驱动实例

以下均在Android Linux内核目录下操作，在drivers目录下创建驱动目录hello

这个目下要创建3个文件，hello.c, Makefile and Kconfig

1.1 hello.c

cd drivers

mkdir hello

vim hello.c
code as follows:

/ linux kernel driver: hello.c => /dev/hello /

please find the code in the below. here skip the code to make the page clean and clear.

1.2 Makefile

Create the Makefile and add:

obj-y += hello.o

1.3 Kconfig

Create Kconfig and add:

config HELLO 
    tristate "Eric: First Android Driver"
default n
help
  This is the first Android driver.

this file is used when we make menuconfig.

1.4 Modify drivers/Makefile

Add following in the end

obj-y += hello.o

1.5 Add the driver into system configuration

Before we build the kernal, we need to config the system.

1.5.1 Modify arch/arm64/Kconfig

Add following in the end

source "drivers/hello/Kconfig"

It seems that this config not work, may be skipped.

1.5.2 Modify drivers/Kconfig

Following the menu:

menu "Device Drivers"

Please add

source "drivers/hello/Kconfig"

1.5.3 Modify drivers/Kconfig

make menuconfig

To enble the menu 'Eric: First Android Driver' in the "Device Drivers" item.

And save , then to build the linux kernel code.

2. 测试驱动

2.1 create the application on externel

在external下创建hello目录

目录下将有两个文件:hello.c and Android.mk

cd external

mkdir hello

vim hello.c

/ AOSP app : ./external/hello.c =>/system/bin/hello /

Android.mk as follows:

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE_TAGS := optional
LOCAL_MODULE := hello
LOCAL_SRC_FILES := $(call all-subdir-c-files)
include $(BUILD_EXECUTABLE)

2.2 build the application

To build the hello application

mmm external/hello/

Add it into the system.img

make snod

2.3 Test/Debug the driver hello

Before flash, we can build the AOSP again, of cource, don't forget replace the linux kernel file 'Image.gz-dtb'.

After flash into the phone, reboot the phone, and then do follows:

C:/Users/ylgi>adb devices
List of devices attached
01059f9781509a67        device

C:/Users/ylgi>adb -s 01059f9781509a67 shell
bullhead:/ $ ls

Android驱动开发---Linux Kernel/HAL Layer/Jni Layer实例全集

cd /system/bin
./hello

Android驱动开发---Linux Kernel/HAL Layer/Jni Layer实例全集

运行效果如上图，表示Linux驱动已经成功加载。

原文 http://blog.51cto.com/12090569/2329081

正文到此结束

所属分类：编程技术 Java

本文标签： linux Android ACE https App mmm ip CTO http shell Menu src tag db 调试 build bug tab UI 开发 id 测试 cat list IO 目录 find 实例文章
版权声明： 本文为互联网转载文章，出处已在文章中说明(部分除外)。如果侵权，请联系本站长删除，谢谢。
本文海报： 生成海报一生成海报二

其他链接

关于本站

本站定位：个人技术类博客

本站作用：写博客、记日志、闲聊扯淡鼓捣技术。

问题交流

Android驱动开发---Linux Kernel/HAL Layer/Jni Layer实例全集

1. Linux 内核驱动实例

2. 测试驱动

热门推荐

相关文章

说给你听

本文目录

随机标签

书籍教程

近期评论

网站信息

其他链接

关于本站

问题交流