在ARM-linux上实现4G模块simcom7100c 的PPP拨号上网

ARM 197浏览

转http://blog.sina.com.cn/s/blog_7880d3350102wb92.html

ARM平台上实现4G模块的PPP拨号上网,参考网上的资料和自己的理解,从一无所知到开发完成花了一周多。最后看到ARMpingwww.baidu.com时甚是高兴,现将此过程整理如下。当然,除此之外要做的工作还有很多。

4G模块使用的SIMTECH SIM7100CSIM7100C带有UARTUSB接口,在考虑速度上我们使用USB接口和ARM进行通信。所以向linux内核添加3G模块的驱动(USB转串口驱动)PPP协议的支持,然后编译内核并下载到开发板。

1. 编译内核

 大容量存储驱动

> Device Drivers > USB support

make ARCH=arm menuconfig配置USB驱动:

<*>     USB Mass Storage support

[*]       USB Mass Storage verbose debug

<*>       Realtek Card Reader support

[*]         Realtek Card Reader autosuspend support

<*>       Datafab Compact Flash Reader support

 USB驱动

> Device Drivers > USB support

<*>   Inventra Highspeed Dual Role Controller (TI, ADI, ...)   

            MUSB Mode Selection (Dual Role mode)  --->             

    <*>     Platform Glue Layer (TI DSPS platforms)  --->           

        MUSB DMA mode (Disable DMA (always use PIO))  --->

<*>   USB Serial Converter support  --->

[*]      USBGeneric Serial Driver 

<*>     USBdriver for GSM and CDMA modems

 PPP驱动

> 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      

<*>   SLIP (serial line) support      

[*]   CSLIP compressed headers

 

2. 交叉编译libusb

下载usblib库和libusb-compat

https://sourceforge.net/projects/libusb/files/

root@zhaoxc-VBox:/opt/usb-tools/libusb-1.0.20# mkdir install

configure: error: "udev support requested but libudev not installed"(解决:添加--disable-udev)

root@zhaoxc-VBox:/opt/usb-tools/libusb-1.0.20# ./configure --host=arm-none-linux-gnueabi --prefix=/opt/usb-tools/libusb-1.0.20/install
--disable-udev

root@zhaoxc-VBox:/opt/usb-tools/libusb-1.0.20# make

root@zhaoxc-VBox:/opt/usb-tools/libusb-1.0.20# make install

 

添加环境变量 http://www.linuxidc.com/Linux/2011-03/33432.htmPKG_CONFIG_PATH设置)

root@zhaoxc-VBox:/opt/usb-tools/libusb-1.0.20# export PKG_CONFIG_PATH=/opt/usb-tools/libusb-1.0.20/install/lib/pkgconfig:$PKG_CONFIG_PATH

root@zhaoxc-VBox:/opt/usb-tools/libusb-1.0.20# echo $PKG_CONFIG_PATH

 

编译libusb-compat

root@zhaoxc-VBox:/opt/usb-tools/libusb-compat-0.1.5# ./configure --host=arm-none-linux-gnueabi --prefix=/opt/usb-tools/libusb-compat-0.1.5/install

root@zhaoxc-VBox:/opt/usb-tools/libusb-compat-0.1.5# make

root@zhaoxc-VBox:/opt/usb-tools/libusb-compat-0.1.5# make install

 

将生成的libusb-1.0.20libusb-compat-0.1.5下的库文件复制到ARM板上的linux/lib下面即可。

 

3. 交叉编译4G模块驱动

交叉编译GobiSerial.c(ARCH=arm CC=arm-none-linux-gnueabi-gcc),得到GobiSerial.ko。复制到ARM板安装驱动

#insmod GobiSerial.ko

 

4. 查看驱动运行状况

插上4G模块,虚拟出6ttyUSB,它们分别是:

root@am335x-evm:/# ls /dev/ttyUSB*

/dev/ttyUSB0  /dev/ttyUSB1  /dev/ttyUSB2  /dev/ttyUSB3  /dev/ttyUSB4  /dev/ttyUSB5

1) /dev/ttyUSB0-diag port for output developing messages

2) /dev/ttyUSB1- NMEA port for GPS NMEA data output

3) /dev/ttyUSB2-AT port for AT commands

4) /dev/ttyUSB3-Modem port for ppp-dial

5) /dev/ttyUSB4-audio port

6) /dev/ttyUSB5-Virtual Net card

 

插上U盘,提示设备运行:

[75097.986054] usb 2-1: New USB device found, idVendor=058f, idProduct=6387

[75097.993167] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3

[75098.000689] usb 2-1: Product: Mass Storage

[75098.004995] usb 2-1: Manufacturer: Generic

[75098.009342] usb 2-1: SerialNumber: AC3DF2EE

[75098.024341] usb-storage 2-1:1.0: USB Mass Storage device detected

[75098.049922] scsi0 : usb-storage 2-1:1.0

lsusb命令查看结果:

Bus 001 Device 002: ID 1e0e:9001

Bus 002 Device 002: ID 058f:6387

Bus 001 Device 001: ID 1d6b:0002

Bus 002 Device 001: ID 1d6b:0002

 

5. 交叉编译PPP

参见:http://blog.sina.com.cn/s/blog_7880d3350102wb3e.html

 

6. 拨号脚本设置

root@am335x-evm:/etc/ppp# vi gprs-connect-chat

#Chat script for China Mobile, used SIMCOM sim4100 TD module.

TIMEOUT 15

ABORT "DELAYED"

ABORT "BUSY"

ABORT "ERROR"

ABORT "NO DIALTONE"

ABORT "NO CARRIER"

TIMEOUT 40

'' rAT

OK ATS0=0

OK ATE0V1

OK AT+CGDCONT=1,"IP","CMNET"

OK AT+CGEQREQ=1,2,128,384,,,0,,,,,,

OK ATDT*99*1#

CONNECT

root@am335x-evm:/etc/ppp/peers# vi gprsdial

#/etc/ppp/peers/gprsdial

# This is pppd script for China Mobile, used SIMCOM SIM7100 Module

# Usage: root>pppd call gprs

#Interface should be used is the interface which connects physics interface of S

/dev/ttyUSB3

115200

crtscts

modem

#noauth

debug

nodetach

#hide-password

usepeerdns

noipdefault

defaultroute

user "cmnet"

0.0.0.0:0.0.0.0

#ipcp-accept-local

#ipcp-accept-remote

#lcp-echo-failure 12

#lcp-echo-interval 3

#noccp

#novj

#novjccomp

#persist

connect '/usr/sbin/chat -s -v -f /etc/ppp/gprs-connect-chat'

#disconnect '/bin/chat -v -f /etc/ppp/gprs-disconnect-chat'

 

6. 拨号

root@am335x-evm: pppd call gprsdial

 

6. 测试

拨号之后进行测试,发现可以pingip但是无法ping通域名。这需要设置/etc/resolv.conf来添加DNS解析服务器的地址

文件/etc/resolv.conf配置DNS客户,它包含了主机的域名搜索顺序和DNS服务器的地址,每一行应包含一个关键字和一个或多个的由空格隔开的参数。下面是一个例子文件: 

domain test.com

search www.test.com test.com

nameserver 202.96.128.86

nameserver 202.96.128.166

nameserver   #定义DNS服务器的IP地址

domain       #定义本地域名

search       #定义域名的搜索列表

sortlist     #对返回的域名进行排序

主要是nameserver关键字,如果没指定nameserver就找不到DNS服务器,其它关键字是可选的。

    我这里只设置了两个DNS,如下:

ameserver 114.114.114.114

nameserver 8.8.8.8

 

参考文档:

How to use the SIM7100 module in Linux.pdf

http://blog.csdn.net/hanmengaidudu/article/details/17099737

http://www.linuxidc.com/Linux/2011-03/33430p2.htm

http://www.linuxidc.com/Linux/2011-03/33430.htm