AM335X Usb 配置设备 RNDIS

 首先：打开linux 内核配置菜单：

$ make CROSS_COMPILE=arm-arago-linux-gnueabi- ARCH=arm menuconfig

  在主菜单选择 Device Drivers

    ...
    ...
    Power management options --->
    [ ] Networking support --->
    Device Drivers --->
    File systems --->
    Kernel hacking --->
    ...
    ...

如下图选择USB support

    ...
    ...
    <*> Sound card support  --->
    [*] HID Devices  --->
    [*] USB support  --->
    <*> MMC/SD/SDIO card support  --->
    ... 
    ...

进入USB Gadget Support 菜单

    ...
    ...
    < >   USB YUREX driver support
    <*>   USB Gadget Support  --->
          *** OTG and related infrastructure ***
    < >   GPIO based peripheral-only VBUS sensing 'transceiver'
    ...
    ...

如下所示选择Inventra HDRC USB Peripheral 

    ...
    ...
    (2)   Maximum VBUS Power usage (2-500 mA)
    (2)   Number of storage pipeline buffers
    <*>   USB Peripheral Controller (Inventra HDRC USB Peripheral (TI, ADI, ...))  --->
    < >   USB Gadget Drivers 
    ...
    ...

如下所示选择Ethernet Gadget 

    ...
    ...
    <*>   USB Peripheral Controller (Inventra HDRC USB Peripheral (TI, ADI, ...))  --->
    < >   USB Gadget Drivers 
    ...
    <M>     Ethernet Gadget (with CDC Ethernet support)
    [*]       RNDIS support
    [ ]       Ethernet Emulation Model (EEM) support
    ...
    ...

注意：

一定要选择 "RNDIS support"

设置完毕后需要make modules 以便生成g_ether.ko驱动

然后将生成的镜像文件下载到开发板中。

进入板子的文件系统，加载该驱动：insmod g_ether.ko

此时RNDIS驱动会生成网络设备usb0(/dev/usb0)，为了能正常的通信可以设置ip地址及其掩码：

ifconfig usb0 <IP_ADDR> netmask255.255.255.0 up

此时就可以正常的通信工作，测试可以使用：

ping -I  <usb0 IP_ADDR> <target IP_ADDR >