Android2.3/4.0 USB tethering为什么不工作了?

最新推荐文章于 2025-04-17 17:54:49 发布

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本文介绍了在Android 2.3及4.0系统中遇到的USB Tethering问题及解决方案，包括检查driver安装、配置文件调整等内容，并对比了两个版本间的架构差异。


1.需要检查PC端的driver是否安装正确.
2.需要检查USB tethering的设置,比如我碰到的问题如下: Android2.3上把wifi不作为tethering 的upstream. Android4.0的确将wifi作为tethering的upstream.device/samsung/smdkc110/overlay_ulmo-ics-gmk/frameworks/base/core/res/res/values/config.xml    <!-- Array of allowable ConnectivityManager network types for tethering -->
    <!-- Common options are [1, 4] for wifi and dun or [0,1,5,7] for -->
    <!-- mobile, wifi, hipri and bluetooth -->
    <integer-array translatable="false" name="config_tether_upstream_types">
        <item>0</item>
        <item>1</item>
        <item>5</item>
        <item>7</item>
    </integer-array>

3.需要了解USB tethering 的代码通路.
比如:Android4.0 BSP切换不同的usb gadget功能的入口函数functions_store,
那这个入口函数如何和Framework层联系起来的? 请看下面的文件中的内容:
device/samsung/smdkc110/init.smdkc110.usb.rc

on property:sys.usb.config=rndis,adb
    write /sys/class/android_usb/android0/enable 0
    write /sys/class/android_usb/android0/idVendor 04e8
    write /sys/class/android_usb/android0/idProduct 6864
    write /sys/class/android_usb/android0/functions $sys.usb.config
    write /sys/class/android_usb/android0/bDeviceClass 224 
    write /sys/class/android_usb/android0/enable 1
    start adbd
    setprop sys.usb.state $sys.usb.config

终于弄明白Framework的UsbService.java和BSP的USB gadget function之间的联系。

4. Reference:
http://www.dzsc.com/data/html/2009-8-11/78192.html
http://www.doc88.com/p-468115456611.html
http://fgsink.blog.163.com/blog/static/1671699702012112429589/
http://blog.youkuaiyun.com/wangyunqian6/article/details/7162636
http://blog.youkuaiyun.com/hongjiujing/article/details/4508105
http://armbedded.eu/node/193
http://www.cnblogs.com/cute/archive/2011/04/21/2023365.html
http://blog.youkuaiyun.com/yaozhenguo2006/article/details/7748896
http://blog.youkuaiyun.com/spark_fountain/article/details/7616001
http://blog.21ic.com/user1/1536/archives/2006/30783.html
http://blog.youkuaiyun.com/mcgrady_tracy/article/details/8164587
http://www.cnblogs.com/xidongs/archive/2011/11/26/2264229.html
http://blog.youkuaiyun.com/lidong_zhou/article/details/7677602
http://my.oschina.net/u/147624?disp=2&p=3

5. Android2.3/4.0 USB tethering archetecture comparation: