詳解USB無線網(wǎng)卡的Linux驅(qū)動(dòng)移植

#KVER:= 2.6.24.7_$(ARCH)

修改第96行，指定2.6.12內(nèi)核路徑：

KSRC:= /test/yle2440_2.6.12

修改完畢后，直接make即可在目錄下生成8712u.ko。下載8712u.ko驅(qū)動(dòng)到目標(biāo)板。

2.5　安裝wirelesstools[3]

無線網(wǎng)卡配置需要使用一些無線網(wǎng)絡(luò)管理工具，如wpa_supplicant、wirelesstools等。本項(xiàng)目使用wirelesstools來實(shí)現(xiàn)。首先下載wireless_tools.29.tar.gz，然后解壓、編譯、安裝。 下面介紹具體步驟。

① 解壓。

tar zxvf wireless_tools.29.tar.gz

② 修改Makefile。

修改第8行，設(shè)置可執(zhí)行文件安裝路徑：

l; ORPHANS: 2; LETTER-SPACING: normal; COLOR: rgb(68,68,68); WORD-SPACING: 0px; PADDING-TOP: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px>PREFIX=/usr/local/wireless

修改第12行，設(shè)置gcc交叉編譯器：

CC=/usr/local/arm/3.4.1/bin/armlinuxgcc

修改第15行，設(shè)置ar交叉編譯器：

AR=/usr/local/arm/3.4.1/bin/armlinuxar

修改第16行，設(shè)置ranlib交叉編譯器：

RANLIB=/usr/local/arm/3.4.1/bin/armlinuxranlib

③ 運(yùn)行make命令。

④ 運(yùn)行make install命令。可執(zhí)行文件安裝于/usr/local/wireless目錄下。

⑤ 拷貝兩個(gè)庫(kù)libiw.so和libiw.so.29到文件系統(tǒng)/test/rootfs/lib目錄下，運(yùn)行chmod 777命令后重新生成壓縮根文件rootfs.cramfs，并下載到ARM板。

⑥ 將安裝目錄下的iwconfig、iwlist等下載到目標(biāo)板。主要使用的命令及功能：

◆ iwconfig，回車，查看所有無線網(wǎng)卡;

◆ iwconfig wlan0，查看wlan0;

◆ iwconfig wlan0 essid xx，配置網(wǎng)卡SSID為xx;

◆ iwlist wlan0 scan|grep ESSID，搜索周邊所有無線網(wǎng)卡的ESSID。

2.6　無線網(wǎng)卡測(cè)試

(1) 插入無線網(wǎng)卡，自動(dòng)安裝USB host驅(qū)動(dòng)

[root@(none) tmp]# uname a

Linux(none) 2.6.12h1940 #59 Tue May 3 13:12:53 CST 2011 armv4tl unknown

[root@(none) tmp]# usb 11:new full speed USB device using s3c2410ohci and address 4

usb 11: Product: RTL8188S WLAN Adapter

usb 11: Manufacturer: Manufacturer Realtek

R-SPACING: normal; COLOR: rgb(68,68,68); WORD-SPACING: 0px; PADDING-TOP: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px>usb 11: SerialNumber: 00e04c000001

(2) 加載模塊8712u.ko

insmod 8712u.ko

(3) 喚醒USB無線網(wǎng)卡驅(qū)動(dòng)

ifconfig wlan0 up

(4) 搜索周邊無線網(wǎng)絡(luò)

[root@(none) tmp]# iwlist wlan0 scan | grep ESSID

fwdbg: get survey cmd

fwdbg: survey done (00000005, 00000000)

ESSID: TPLINK_WSW

ESSID: TPLINK_717E24

ESSID: dlink

ESSID: newnav

ESSID: dgdz

(5) 配置wlan0的SSID

iwconfig wlan essid TPLINK_717E24

配置成功后利用iwconfig回顯：

[root@(none) tmp]# uname a

Linux (none) 2.6.12h1940 #59 Tue May 3 13:12:53 CST 2011 armv4tl unknown

[root@(none) tmp]# iwconfig wlan0

wlan0IEEE 802.11bg ESSID:TPLINK_717E24

Mode: Managed Frequency: 2.437 GHz Access Point: 00:25:86:71:7E:24

Bit Rate: 54 Mb/s

Encryption key:off

Power Management: off

Link Quality=52/100 Signal level=52/100 Noise level=0/100

Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0

Tx excessive retries:0 Invalid misc:0 Missed beacon:0

(6) IP動(dòng)態(tài)分配

自動(dòng)申請(qǐng)動(dòng)態(tài)IP：

udhcpc i wlan0

顯示如下信息：

[root@(none) tmp]# uname a

Linux (none) 2.6.12h1940 #59 Tue May 3 13:12:53 CST 2011 armv4tl unknown

[root@(none) tmp]# udhcpc i wlan0

udhcpc (v0.9.9pre) started

udhcpc[490]: udhcpc (v0.9.9pre) started

Sending discover...

udhcpc[490]: Sending discover...

Sending select for 172.16.51.9...

udhcpc[490]: Sending select for 172.16.51.9...

Lease of 172.16.51.9 obtained, lease time 691200

udhcpc[490]: Lease of 172.16.51.9 obtained, lease time 691200

deleting routers

route: SIOC[ADD|DEL]RT: No such process

adding dns 61.153.216.99

adding dns 61.153.216.104

px; WIDOWS: 2; TEXT-TRANSFORM: none; TEXT-INDENT: 2em; MARGIN: 10px 25px 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; FONT: 14px/22px 宋體, Georgia, verdana, serif; WHITE-SPACE: normal; ORPHANS: 2; LETTER-SPACING: normal; COLOR: rgb(68,68,68); WORD-SPACING: 0px; PADDING-TOP: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px>運(yùn)行ifconfig命令后，顯示最終配置：

[root@(none) tmp]# uname a

Linux (none) 2.6.12h1940 #59 Tue May 3 13:12:53 CST 2011 armv4tl unknown

[root@(none) tmp]# ifconfig wlan0

wlan0 Line encap: Ethernet HWaddr 00:0F:10:54:0E:1B

inet addr: 172.16.51.9 Bcast:172.16.255.255 Mask: 255.255 Mask:255.255.255.0

UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1

RX packets:618 errors:0 dropped:0 overruns:0 frame:0

TX packets:2 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:1000