步驟5：ping ip或者域名，命令如下。

root@fl-imx6ull:~# ping -c 4 www.baidu.com

PING www.baidu.com (220.181.38.149): 56 data bytes

64 bytes from 220.181.38.149: seq=0 ttl=51 time=26.648 ms

64 bytes from 220.181.38.149: seq=1 ttl=51 time=13.529 ms

64 bytes from 220.181.38.149: seq=2 ttl=51 time=15.656 ms

64 bytes from 220.181.38.149: seq=3 ttl=51 time=26.249 ms

 

--- www.baidu.com ping statistics ---

4 packets transmitted, 4 packets received, 0% packet loss

round-trip min/avg/max = 13.529/20.520/26.648 ms

步驟6：卸載已經(jīng)加入內(nèi)核的模塊。

root@fl-imx6ull:~# rmmod 8188eu

打印信息如下：

RTL871X: module exit start

usbcore: deregistering interface driver rtl8188eu

RTL871X: indicate disassoc

RTL871X: rtw_cmd_thread: DriverStopped(1) SurpriseRemoved(0) break at line 478

wlan0: CTRL-EVENT-DISCONNECTED bssid=04:d7:a5:84:fa:40 reason=3 locally_generated=1

RTL871X: rtw_ndev_uninit(wlan0)

RTL871X: rtw_dev_unload: driver not in IPS

usb 1-1.3: reset high-speed USB device number 7 using ci_hdrc

RTL871X: module exit success

2、 板載WIFI的使用

說明：

l wifi頻率為2.4G

l 兼容8723bu和8723du兩種wifi驅(qū)動(dòng)

l 默認(rèn)路由器采用wpa加密方式。

如果開發(fā)板有板載的WIFI無線局域網(wǎng)卡，則焊接在評(píng)估板如圖所示位置（下圖為8723du）：

?

步驟1：檢查iMX6ULL開發(fā)板是否已經(jīng)焊接該模塊，正確焊接如上圖。連接上天線。

步驟2：iMX6ULL開發(fā)板上電，啟動(dòng)Linux系統(tǒng),先使用lsmod查看模塊加載狀態(tài)：

root@fl-imx6ull:~# lsmod

Module                  Size  Used by

mx6s_capture           14876  0

8723 du                1313893  0             //默認(rèn)wifi自動(dòng)加載，8723du已加載成功

ov9650_camera          12446  0

注意：若 飛凌iMX6ULL 開發(fā)板上焊接的是8723 b u，使用lsmod會(huì)顯示8723 b u

以下以8723du為例進(jìn)行測試描述：

步驟3：測試

? STA模式

該模式即作為一個(gè)站點(diǎn)，連接到無線網(wǎng)絡(luò)中，操作方法如下：

-i表示wifi型號(hào)；-s表示wifi熱點(diǎn)名稱；-p表示密碼，若無密碼輸入-p NONE；路由器采用wpa加密方式，具體操作指令可查看wifi.sh腳本

root@fl-imx6ull:~# fltest_cmd_wifi.sh -i 8723du -s forlinx -p xxx        //執(zhí)行測試腳本

打印信息如下：

wifi 8723du
ssid forlinx
pasw xxx
usbcore: deregistering interface driver rtl8723du
usbcore: registered new interface driver rtl8723du
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
Successfully initialized wpa_supplicant
rfkill: Cannot open RFKILL control device
udhcpc (v1.24.1) started
Sending discover...
wlan0: CTRL-EVENT-REGDOM-CHANGE init=BEACON_HINT type=UNKNOWN
wlan0: Trying to associate with 04:d7:a5:f9:26:1d (SSID='forlinx' freq=2427 MHz)
wlan0: Associated with 04:d7:a5:f9:26:1d
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
wlan0: WPA: Key negotiation completed with 04:d7:a5:f9:26:1d [PTK=CCMP GTK=TKIP]
wlan0: CTRL-EVENT-CONNECTED - Connection to 04:d7:a5:f9:26:1d completed [id=0 id_str=]
nf_conntrack: automatic helper assignment is deprecated and it will be removed soon. Use the iptables CT target to attach helpers instead.
Sending discover...
Sending select for 192.168.5.186...
Lease of 192.168.5.186 obtained, lease time 1800
/etc/udhcpc.d/50default: Adding DNS 222.222.202.202
/etc/udhcpc.d/50default: Adding DNS 222.222.222.222
WLAN Finshed!

腳本運(yùn)行完，能自動(dòng)分配ip并生成DNS，則wifi連接成功。

ping ip或者域名，命令如下：

root@fl-imx6ull:~#ping -c 5www.baidu.com

?