Hezhou Cat1 4G module Air724UG is configured with RNDIS network card or PPP dial-up, and the development board is connected to the Internet through the RNDIS network card (taking the RV1126/1109 devel

前言

     本教程使用Ubuntu16.04,The development board used is RockchipRV1109、4GThe module is launched by HezhouAir724UG Cat1.Official at RockchipSDKThe source code is compiled without any configuration or modification,The development board is not recognized correctly4G模块的.In order to allow the development board to be correctly identified4GNetwork card and able to access the Internet,It is necessary to configure and modify the source code.

     不同的4GModules are differentVID和PID,合宙Cat1 Air724UG的VID和PID为(0x1782,0x4e00),Cat4系列PID和VID为(0x1286,0x4e3d).this will be a.1.①中涉及,That is, add the device to the kernel source codeVID和PID.

一、源码修改

1./home/lihq/RV1109/kernel/drivers/usb/serial/option.cDirectory file source code modification

①首先进入目录/home/lihq/RV1109/kernel/drivers/usb/serial/

​然后执行指令​​sudo vim option.c​​打开option.c文件,Add the following code in the corresponding position,That is, the addition device mentioned aboveVID和PID（VimThe use of the editor will not be explained too much here）

②Then enter the directory again/home/lihq/RV1109/kernel/drivers/usb/serial/,再打开文件usb_wwan.c.

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       sudo vim usb_wwan.c
      
      
      
      

       
       
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Add the following code in the appropriate place：

到这里,All file codes of the kernel have been modified.Next comes the graphical configuration.

二、make menuconfig图形化配置

1.Enter the kernel source root directory

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       cd /home/lihq/RV1109/kernel/
      
      
      
      

       
       
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Execute in the kernel source root directory​​make menuconfig​​指令：

2.修改相关配置

Press on the keyboard in the GUI/键,再输入RNDIS进行搜索.并且将与RNDISThe relevant options are configured as y或者m,That is, the relevant drivers are compiled into the kernel after configuration,启动时自动加载.

PPPDial-up drivers are the same,Press on the keyboard in the GUI/键,再输入PPP进行搜索.并且将与PPPThe relevant options are configured as y或者m.

三、Recompile the kernel and verify

1.重新编译内核

cd /home/lihq/RV1109 Enter the kernel source root directory

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       cd /home/lihq/RV1109
      
      
      
      

       
       
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再进行编译

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       ./build.sh
      
      
      
      

       
       
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编译完成后,将得到的update.imgThe image file is burned to the development board by Rockchip development tools.

2.Verify in the development board

将4G模块通过USB连接开发板,给开发板上电.在终端输入​​ls /dev/ttyUSB*​​,If three can be identifiedUSB端口,即ttyUSB0、ttyUSB1、ttyUSB2,It indicates that the development board has been successfully identified4G模块.

再在终端输入​​ifconfig​​,则能看到RNDIS驱动提供的eth1网卡,and has been assigned successfullyIP.

再终端输入​​ping www.baidu.com​​,也能成功ping通百度.

总结

1：配置RNDIS 4GThere are two main steps in the network card,One is to modify the relevant kernel source code,其二是make menuconfig进行图形化配置,然后再重新编译内核.

2：When modifying the kernel source code,注意不要输错了,Otherwise, the configuration may fail.

3：其他开发板SDKThe source code is also modified by similar operations.