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
重新启动后 执行ifcong命令，若出现ppp接口表示拨号成功，如图
