- 2013-12-22 我來說兩句
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一.ARM-Linux
ARM-Linux-2.6.17
3G USB Modem:huaweiE220(WCDMA),huaweiEC156(EVDO)
arm-linux至少需要支持usb host,usb storage,usbfs,usb serial
二.Linux驅(qū)動(dòng)
option.c
linux中option.c就是針對3G modem的驅(qū)動(dòng),稍作修改即可支持大部分的3G usb modem
目前我的這個(gè)版本的USB Option PCMCIA serial driver依賴于USB_SERIAL && USB_OHCI_HCD && PCCARD,所以系統(tǒng)要保證已經(jīng)選定了這三個(gè)選項(xiàng),如果host不同,可以自行修改USB_OHCI_HCD這個(gè)依賴項(xiàng),我的目前使用isp芯片所以就修改了這個(gè)依賴項(xiàng),總而言之,usb host是必須需要的.
添加對華為e220和華為ec156的支持,在option_ids數(shù)組中添加子項(xiàng):
1. #define HUAWEI_PRODUCT_E220 0x1003
2. #define HUAWEI_PRODUCT_EC156 0x140c
1. { USB_DEVICE(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_E220) },
2. { USB_DEVICE(HUAWEI_VENDOR_ID, HUAWEI_PRODUCT_EC156)},
三.工具
usb_switchmode-1.2.4
這是目前的最新版本,使用這個(gè)工具的目的是將默認(rèn)被識(shí)別為存儲(chǔ)設(shè)備的3g usb modem轉(zhuǎn)換為可以通訊的多個(gè)串口設(shè)備,以用于ppp撥號(hào)連接.
此工具依賴于linusb的,全部交叉編譯之,.
1.下載并交叉編譯libusb-0.1.12:
./configure --build=i686-linux --host=arm-linux --prefix=$PWD/install
make
make -n install (確定安裝目錄)
make install
至此,libusb編譯完畢.
2.交叉編譯usb_switchmode
修改makefile:
cc=arm-linux-gcc
INCLUDEDIR =/home/jay/tools/3G/libusb-0.1.12/install/include
LIBDIR =/home/jay/tools/3G/libusb-0.1.12/install/lib
$(CC) -I $(INCLUDEDIR) -L $(LIBDIR) -o $(PROG) $(OBJS) $(CFLAGS) $(LIBS) $(LDFLAGS) -static
make
順利通過,至此得到靜態(tài)編譯的usb_switchmode
3.將usb_switchmode移到arm linux文件系統(tǒng)中,然后將usb_switchmode.conf文件夾復(fù)制進(jìn)arm linux中的/etc/目錄下,這個(gè)文件夾下是很多3g usb modem的配置文件.
4.pppd撥號(hào)軟件
移植pppd2.4.5
./configure
make CC=arm-linux-gcc
需要的東西就是:pppd chat pppdump pppstats下可執(zhí)行程序pppd, chat, pppdump, pppstats
在嵌入式文件系統(tǒng)下需要建立/etc/ppp/peers文件夾
四.使用
插入3g usb modem的時(shí)候會(huì)被默認(rèn)識(shí)別為u盤,此時(shí)使用usb_switchmode工具轉(zhuǎn)換,就會(huì)綁定到多個(gè)串口上去,
usb_modeswitch -W -c /etc/usb_modeswitch.d/12d1_1505
其中-W僅僅是顯示詳細(xì)配置信息,-c是指指定配置文件,usb_switchmode自帶的配置文件貌似在嵌入式下使用都多多少少有點(diǎn)問題,隨后發(fā)現(xiàn),必須要指定
DefaultVendor 和 DefaultProduct兩個(gè)參數(shù).
usb 1-1: new full speed USB device using isp1362-hcd and address 8
usb 1-1: configuration #1 chosen from 1 choice
option 1-1:1.0: Option 3G data card converter detected
usb 1-1: Option 3G data card converter now attached to ttyUSB0
option 1-1:1.1: Option 3G data card converter detected
usb 1-1: Option 3G data card converter now attached to ttyUSB1
option 1-1:1.2: Option 3G data card converter detected
usb 1-1: Option 3G data card converter now attached to ttyUSB2
option 1-1:1.3: Option 3G data card converter detected
usb 1-1: Option 3G data card converter now attached to ttyUSB3
scsi6 : SCSI emulation for USB Mass Storage devices
如果沒有ttyUSB0之類的設(shè)備節(jié)點(diǎn),可以自己手動(dòng)建立,
mknod /dev/ttyUSB0 c 188 0
mknod /dev/ttyUSB0 c 188 1
....
之后可以
echo ATZ>/dev/ttyUSB0,如果沒有錯(cuò)誤,轉(zhuǎn)換基本ok.
最后就剩下ppp撥號(hào)
目前我使用的e220是wcdma制式,ec156是evdo制式,其撥號(hào)腳本少有不同(驅(qū)動(dòng)僅僅是設(shè)備號(hào)碼有點(diǎn)點(diǎn)區(qū)別)
1.wcdma:
1. debug
2. nodetach
3. lock
4. /dev/ttyUSB0
5. 115200
6. user "14522023288"
7. password "******"
8. crtscts
9. show-password
10. usepeerdns
11. noauth
12. noipdefault
13. novj
14. novjccomp
15. noccp
16. defaultroute
17. ipcp-accept-local
18. ipcp-accept-remote
19. connect '/usr/sbin/chat -s -v -f chat-wcdma-connect'
20. disconnect '/usr/sbin/chat -s -v -f chat-wcdma-disconnect'
chat-wcdma-connect:
1. TIMEOUT 5
2. ABORT 'NO CARRIER'
3. ABORT 'ERROR'
4. ABORT 'NO DIALTONE'
5. ABORT 'BUSY'
6. ABORT 'NO ANSWER'
7. '' /rAT
8. OK /rATZ
9. OK /rAT+CGDCONT=1,"IP","3gnet",,0,0
10. OK-AT-OK ATDT*99#
11. CONNECT /d/c
chat-wcdma-disconnect:
[html] view plaincopy1. ABORT "BUSY"
2. ABORT "ERROR"
3. ABORT "NO DIALTONE"
4. SAY "/nSending break to the modem/n"
5. '' "/K"
6. '' "+++ATH"
7. SAY "/nGoodbay/n"
2.evdo
1. debug
2. nodetach
3. lock
4. /dev/ttyUSB0
5. 115200
6. user "ctnet@mycdma.cn"
7. password "vnet.mobi"
8. crtscts
9. show-password
10. usepeerdns
11. noauth
12. noipdefault
13. novj
14. novjccomp
15. noccp
16. defaultroute
17. ipcp-accept-local
18. ipcp-accept-remote
19. connect '/usr/sbin/chat -s -v -f /etc/ppp/peers/chat-evdo-connect'
20. disconnect '/usr/sbin/chat -s -v -f /etc/ppp/peers/chat-evdo-disconnect'
chat-evdo-connect:
1. TIMEOUT 60
2. ABORT 'NO CARRIER'
3. ABORT 'ERROR'
4. ABORT 'NO DIALTONE'
5. ABORT 'BUSY'
6. ABORT 'NO ANSWER'
7. '' /rATZ
8. OK-AT-OK ATD#777
9. CONNECT /d/c
chat-evdo-disconnect:
1. ABORT 'NO CARRIER'
2. ABORT 'ERROR'
3. ABORT 'NO DIALTONE'
4. ABORT 'BUSY'
5. ABORT 'NO ANSWER'
6. SAY "/nSending break to the modem/n"
7. '' "/K"
8. '' "+++ATH"
9. SAY "/nGoodbay/n"
后臺(tái)撥號(hào)使用:
pppd call wcdma&
pppd call evdo&
電信的ecdo貌似賬號(hào)密碼必須使用ctnet@mycdma.cn vnet.mobi,不能使用電話號(hào)碼和給定的密碼.
如果撥號(hào)成功ifconfig可以看到ppp0
ppp0 Link encap:Point-to-Point Protocol
inet addr:183.43.180.134 P-t-P:113.115.0.1 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:4 errors:0 dropped:0 overruns:0 frame:0
TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:3
RX bytes:70 (70.0 B) TX bytes:64 (64.0 B)
測試網(wǎng)絡(luò):
# ping www.baidu.com
PING www.a.shifen.com (220.181.111.148): 56 data bytes
64 bytes from 220.181.111.148: icmp_seq=0 ttl=55 time=91.3 ms
64 bytes from 220.181.111.148: icmp_seq=1 ttl=55 time=105.3 ms
64 bytes from 220.181.111.148: icmp_seq=2 ttl=55 time=93.9 ms
64 bytes from 220.181.111.148: icmp_seq=3 ttl=55 time=98.9 ms
64 bytes from 220.181.111.148: icmp_seq=4 ttl=55 time=95.4 ms
ping的時(shí)候注意屏蔽掉eth0之類的其他網(wǎng)絡(luò)節(jié)點(diǎn):ifconfig eth0 down
如果無法解析域名,多半應(yīng)該是dns問題,本來ppp的dns是自動(dòng)獲取的,但是它保存的路徑是/etc/ppp/resolv.conf,但是linux使用的卻是/etc/resolv.conf,所以我們建立一個(gè)軟連接即可:
ln -s /etc/ppp/resolv.conf /etc/resolv.conf
至此3G usb modem嵌入式下使用告一段落
