Android2.3/4.0 USB tethering为什么不工作了?

时间：2021-05-15 16:11:10

 

 

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.csdn.net/wangyunqian6/article/details/7162636 

http://blog.csdn.net/hongjiujing/article/details/4508105 


http://armbedded.eu/node/193 

http://www.cnblogs.com/cute/archive/2011/04/21/2023365.html 

http://blog.csdn.net/yaozhenguo2006/article/details/7748896 

http://blog.csdn.net/spark_fountain/article/details/7616001 

http://blog.21ic.com/user1/1536/archives/2006/30783.html 

http://blog.csdn.net/mcgrady_tracy/article/details/8164587 

http://www.cnblogs.com/xidongs/archive/2011/11/26/2264229.html 

http://blog.csdn.net/lidong_zhou/article/details/7677602 

http://my.oschina.net/u/147624?disp=2&p=3 



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

           Android2.3/4.0 USB tethering为什么不工作了?       Android2.3/4.0 USB tethering为什么不工作了?
 

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