硬件环境：

    开发板为RT5053F   

    3G模块为中兴 MC2176 电信版

以下是操作步骤

• 加入VID 、PID

  VID 、 PID 的获取方法是  将设备插入电脑在linux下执行lsusb命令，如图

  
  或者是依照无线模块驱动使用手冊，将产品支持的IDS所有增加option.c文件里

  openwrt-1407在例如以下位置:
  build_dir/target-mipsel_24kec+dsp_uClibc-0.9.33.2/linux-ramips_mt7620n/linux-3.10.49/drivers/usb/serial/option.c
  

• 内核的编译配置

  make kernel_ menuconfig

  USB串口驱动相关的配置项：

  Device Drivers  ---> [*] USB support  --->   <*>   Support for Host-side USB[*]     USB announce new devices[*]     Enable USB persist by default<*>     EHCI HCD (USB 2.0) support[*]       Root Hub Transaction Translators[*]       Improved Transaction Translator scheduling<*>     OHCI HCD (USB 1.1) support<*>     USB Modem (CDC ACM) support<*>     USB Printer support<*>     USB Wireless Device Management support<*>   USB Serial Converter support  ---> <*>   USB driver for GSM and CDMA modems
  

  PPP拨号的相关配置：

  Device Drivers  ---> [*] Network device support  ---><*>   PPP (point-to-point protocol) support<*>     PPP BSD-Compress compression<*>     PPP Deflate compression[*]     PPP filtering<*>     PPP MPPE compression (encryption)[*]     PPP multilink support<*>     PPP over Ethernet<*>     PPP support for async serial ports<*>     PPP support for sync tty ports
  

  所需软件包：

  ppp
  chat
  comgt
  librt
  libusb-1.0
  usb-modeswith
  zlib
  

  保存 运行make V=99 后将编译好的镜像文件烧写到开发板。然后启动开发板

配置 网络

/etc/config/network
config interface 'ppp0'option ifname 'ppp0'option service 'evdo'option username 'card'option password 'card'option device '/dev/ttyUSB0'option proto '3g'option dialnumber '#777'option apn 'ctnet'option auto 1

重新启动网络

/etc/init.d/netwrok restart