嵌入式

嵌入式linux加载无线网卡方法

2019-07-12 22:28发布

站内文章 / 嵌入式Linux
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          有一张威盛无线网卡，闲着蛋疼，挂载了一下。           具体方法如下： 1、网上找到无线网卡驱动：vntwusb.ko; 2、加载无线网卡驱动：insmod vntwusb.ko; [root@FriendlyARM plg]# insmod vntwusb.ko VIA Networking Wireless LAN USB Driver Ver. 1.20.03 VIA Networking Wireless LAN USB Driver Ver. 1.20.03 Copyright (c) 2004 VIA Networking Technologies, Inc. usb 1-1: reset full speed USB device using s3c2410-ohci and address 2 usbcore: registered new interface driver vntwusb     3、查看无线网卡：   iwconfig [root@FriendlyARM plg]# iwconfig lo no wireless extensions. eth0 no wireless extensions. eth1 802.11-a/b/g ESSID:"" Mode:Managed Frequency=2.412 GHz Access Point: Not-Associated Bit Rate:1 Mb/s Sensitivity=0/255 Retry min limit:8 RTS thr:off Fragment thr:off Encryption key:off Power Management:off Link Quality:0 Signal level:0 Noise level:0 Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0 vntwpa no wireless extensions.
4、打开网卡：       ifconfig eth1 up [root@FriendlyARM plg]# ifconfig eth1 up Config_FileOperation file Not exist Zone=[2][E][U]!! Antenna MAIN available!
5、扫描无线网络：iwlist eth1 scanning [root@FriendlyARM plg]# iwlist eth1 scanning eth1 Scan completed : Cell 01 - Address: 00:23:CD:15:60:40 ESSID:"TP-LINK" Mode:Managed Channel:1 Frequency:2.412 GHz (Channel 1) Quality=50/100 Signal level=-70 dBm Noise level=0 dBm Encryption key:off Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s 12 Mb/s; 24 Mb/s; 36 Mb/s; 9 Mb/s; 18 Mb/s 48 Mb/s; 54 Mb/s Extra:bcn_int=100 Cell 02 - Address: 00:23:89:97:BC:10 ESSID:"H3C" Mode:Managed Channel:1 Frequency:2.412 GHz (Channel 1) Quality=65/100 Signal level=-64 dBm Noise level=0 dBm Encryption key:off Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s 11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s 48 Mb/s; 54 Mb/s Extra:bcn_int=100 Cell 03 - Address: 00:23:89:97:BC:11 ESSID:"touzi-net" Mode:Managed Channel:1 Frequency:2.412 GHz (Channel 1) Quality=65/100 Signal level=-64 dBm Noise level=0 dBm Encryption key:on Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 6 Mb/s; 9 Mb/s 11 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s 48 Mb/s; 54 Mb/s Extra:bcn_int=100 Cell 04 - Address: F4:EC:38:7B:5F:FE ESSID:"chengang" Mode:Managed Channel:6 Frequency:2.437 GHz (Channel 6) Quality=100/100 Signal level=-40 dBm Noise level=0 dBm Encryption key:on Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 6 Mb/s 9 Mb/s; 12 Mb/s; 18 Mb/s; 24 Mb/s; 36 Mb/s 48 Mb/s; 54 Mb/s Extra:bcn_int=100 IE: IEEE 802.11i/WPA2 Version 1 Group Cipher : CCMP Pairwise Ciphers (1) : CCMP Authentication Suites (1) : PSK       6、扫描到无线网络后（这里是H3C），连接无密钥无线网络：iwconfig eth1 essid H3C [root@FriendlyARM plg]# iwconfig eth1 essid H3C [root@FriendlyARM plg]# AP(BSS) finding:Found a AP(BSS).. 802.11 Authen (OPEN) Successful. Association Successful, AID=6. Link with AP(SSID): H3C    7、连接好后，可以查看下无线网络：iwconfig eth1 [root@FriendlyARM plg]# iwconfig eth1 eth1 802.11-a/b/g ESSID:"H3C" Mode:Managed Frequency=2.412 GHz Access Point: 00:23:89:97:BC:10 Bit Rate=1 Mb/s Sensitivity=-60 dBm Retry min limit:8 RTS thr:off Fragment thr:off Encryption key:off Power Management:off Link Quality=88/100 Signal level:-60 dBm Noise level:0 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0
8、设置eth1的ip地址，网关，DNS（H3C的网关为192.168.254.1，DNS为202.96.134.133）
 [root@FriendlyARM plg]# ifconfig eth1 192.168.254.245 netmask 255.255.255.0 [root@FriendlyARM plg]# route add default gw 192.168.254.1 [root@FriendlyARM plg]# echo "nameserver 202.96.134.133">> /etc/resolv.conf    注意：这里修改的值，在下次reboot后就没有了，如果要彻底修改的话，在linux系统中，可以用vi修改：vi /etc/sysconfig/network-scripts/ifcfg-eth0（修改这个在下次reboot后生效）。但是 嵌入式linux下面没有sysconfig这个目录，因此，具体方法看12。
9、修改完成后，就可以ping下网关了： [root@FriendlyARM plg]# ping 192.168.254.1 -I eth1 PING 192.168.254.1 (192.168.254.1): 56 data bytes 64 bytes from 192.168.254.1: seq=0 ttl=128 time=10.732 ms 64 bytes from 192.168.254.1: seq=1 ttl=128 time=3.418 ms 64 bytes from 192.168.254.1: seq=2 ttl=128 time=4.078 ms 64 bytes from 192.168.254.1: seq=3 ttl=128 time=4.095 ms 64 bytes from 192.168.254.1: seq=4 ttl=128 time=10.198 ms
10、然后ping下外网看看，这里ping下google： [root@FriendlyARM plg]# ping www.google.com -I eth1 PING www.google.com (74.125.71.105): 56 data bytes 64 bytes from 74.125.71.105: seq=0 ttl=51 time=16.472 ms 64 bytes from 74.125.71.105: seq=1 ttl=51 time=18.067 ms 64 bytes from 74.125.71.105: seq=3 ttl=51 time=14.123 ms 64 bytes from 74.125.71.105: seq=4 ttl=51 time=13.120 ms 64 bytes from 74.125.71.105: seq=5 ttl=51 time=14.130 ms
11、上面是加载无密钥的ap，那么如果ap有密钥应该怎么办呢？这就要在linux下面查看下iwconfig这个命令的用法了。用man查看下这个命令。 [root@localhost ~]# man iwconfig      可以知道，这个命令加载有密钥（密钥为ccavccav）的方式如下： [root@FriendlyARM plg]# iwconfig eth1 essid chengang key ccavccav     但是，iwconfig只能加载密钥为wep的ap点，不能加载密钥为wpa的ap点。如果要加载wpa的ap点，就得用wpa_supplicant这个工具了。
12、关于嵌入式linux开机加载驱动和修改ip的方法：    可以修改/etc/init.d/rcS这个开机启动脚本，将上面这些命令加载到这些脚本里面。就不用每次开机都要配置了。

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