一、iMX6ULL开发板 WIFI 功能测试
WiFi支持:
模块
支持
RTL8188EUS
WiFi
RTL8723BU
WiFi
RTL8723DU
WiFi
1、 USB WIFI RTL8188eus使用
说明: USB WIFI无线局域网卡是选配模块 ,如若有需求,请联系飞凌嵌入式官网在线客服。
以下对wifi模块在STA模式下,连接到无线网络的测试:
步骤1:iMX6ULL开发板上电,启动Linux系统。
步骤2:连接USB WIFI到飞凌iMX6ULL开发板的USB Host接口
步骤 3 :按照如下格式输入相应的参数:
-i表示wifi型号;
-s表示wifi热点名称;
-p表示密码,若无密码输入-p NONE;
路由器采用wpa加密方式。具体操作指令可查看wifi.sh脚本。
连接打印内容如下:
root@fl-imx6ull:~# fltest_cmd_wifi.sh -i 8188 -s forlinx -p xxxx
打印信息如下:
wifi 8188
ssid forlinx
pasw xxxx
usbcore: deregistering interface driver rtl8723bu
RTL871X: module exit start
usbcore: deregistering interface driver rtl8188eu
RTL871X: rtw_ndev_uninit(wlan1)
usb 1-1.3: reset high-speed USB device number 7 using ci_hdrc
RTL871X: module exit success
RTL871X: module init start
RTL871X: rtl8188eu v4.3.0.9_15178.20150907
RTL871X: build time: Mar 25 2020 02:23:46
bFWReady == _FALSE call reset 8051...
RTL871X: rtw_ndev_init(wlan0)
usbcore: registered new interface driver rtl8188eu
RTL871X: module init ret=0
==> rtl8188e_iol_efuse_patch
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
ps: invalid option -- 'f'
BusyBox v1.24.1 (2019-04-27 02:24:01 CST) multi-call binary.
Usage: ps
Successfully initialized wpa_supplicant
rfkill: Cannot open RFKILL controRTL871X: set bssid:00:00:00:00:00:00
l device
RTL871X: set ssid [g▒isQ▒J▒)ͺ▒▒▒▒F|▒T▒▒vZ.c3▒ɚ���<▒▒▒▒] fw_state=0x00000008
ioctl[SIOCSIWAP]: Operation not permitted
ioctl[SIOCGIWSCAN]: Resource temporarily unavailable
ioctl[SIOCGIWSCAN]: Resource temporarily unavailable
RTL871X: indicate disassoc
wlan0: Trying to associate with 04:d7:a5:84:fa:40 (SSID='forlinx' freq=2437 MHz)
RTL871X: set ssid [forlinx] fw_state=0x00000008
RTL871X: set bssid:04:d7:a5:84:fa:40
RTL871X: start auth
RTL871X: auth success, start assoc
RTL871X: assoc success
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
RTL871X: recv eapol packet
wlan0: Associated with 04:d7:a5:84:fa:40
RTL871X: send eapol packet
RsvdPageNum: 8
udhcpc (v1.24.1) started
RTL871X: recv eapol packet
RTL871X: send eapol packet
RTL871X: recv eapol packet
RTL871X: send eapol packet
RTL871X: set pairwise key camid:4, addr:04:d7:a5:84:fa:40, kid:0, type:AES
wlan0: WPA: Key negotiation completed with 04:d7:a5:84:fa:40 [PTKRTL871X: set group key camid:5, addr:04:d7:a5:84:fa:40, kid:2, type:AES
=CCMP GTK=CCMP]
wlan0: CTRL-EVENT-CONNECTED - Connection to 04:d7:a5:84:fa:40 completed [id=0 id_str=]
Sending discover...
Sending select for 192.168.4.129...
Lease of 192.168.4.129 obtained, lease time 36000
/etc/udhcpc.d/50default: Adding DNS 222.222.202.202
/etc/udhcpc.d/50default: Adding DNS 222.222.222.222
Finshed!
脚本运行完,能自动分配ip并添加DNS,则wifi连接成功。
步骤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
步骤6:卸载已经加入内核的模块。
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、 板载WIFI的使用
说明:
l wifi频率为2.4G
l 兼容8723bu和8723du两种wifi驱动
l 默认路由器采用wpa加密方式。
如果开发板有板载的WIFI无线局域网卡,则焊接在评估板如图所示位置(下图为8723du):
步骤1:检查iMX6ULL开发板是否已经焊接该模块,正确焊接如上图。连接上天线。
步骤2:iMX6ULL开发板上电,启动Linux系统,先使用lsmod查看模块加载状态:
root@fl-imx6ull:~# lsmod
Module Size Used by
mx6s_capture 14876 0
8723 du 1313893 0 //默认wifi自动加载,8723du已加载成功
ov9650_camera 12446 0
注意:若 飞凌iMX6ULL 开发板上焊接的是8723 b u,使用lsmod会显示8723 b u
以下以8723du为例进行测试描述:
步骤3:测试
Ø STA模式
该模式即作为一个站点,连接到无线网络中,操作方法如下:
-i表示wifi型号;-s表示wifi热点名称;-p表示密码,若无密码输入-p NONE;路由器采用wpa加密方式,具体操作指令可查看wifi.sh脚本
root@fl-imx6ull:~# fltest_cmd_wifi.sh -i 8723du -s forlinx -p xxx //执行测试脚本
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!
脚本运行完,能自动分配ip并生成DNS,则wifi连接成功。
ping ip或者域名,命令如下:
root@fl-imx6ull:~# ping -c 5 www.baidu.com
打印信息如下:
PING 192.168.4.1 (192.168.4.1): 56 data bytes
64 bytes from 192.168.4.1: seq=0 ttl=128 time=39.783 ms
64 bytes from 192.168.4.1: seq=1 ttl=128 time=81.529 ms
64 bytes from 192.168.4.1: seq=2 ttl=128 time=15.236 ms
64 bytes from 192.168.4.1: seq=3 ttl=128 time=12.076 ms
64 bytes from 192.168.4.1: seq=4 ttl=128 time=16.300 ms
--- 192.168.4.1 ping statistics ---
5 packets transmitted, 5 packets received, 0% packet loss
round-trip min/avg/max = 12.076/32.984/81.529 ms
wifi信号
查看WiFi信号方法如下:
root@fl-imx6ull:~# cat /proc/net/wireless | grep wlan0 | awk '{print $3}' //获取信号强度
78.
root@fl-imx6ull:~# cat /proc/net/wireless | grep wlan0 | awk '{print $4}' //获取信号质量,单位dBm
-68.
root@fl-imx6ull:~# cat /proc/net/wireless | grep wlan0 | awk '{print $5}' //网口背景噪声,单位dBm
-256.
AP模式
说明:
l 本模块支持AP模式,理论最大连接用户为8个。
l 本例为以太网eth0连接路由器说明,配置完以太网后,需要测试eth0是否可以连接外网,如果可以连接外网(方法参考 “有线网卡”章节),请继续按照操作步骤执行,如果不可以请检查以太网或者路由器连接是否正常。
工作在AP模式下,手机等设备可以直接连接模块。
设置以太网IP,配置网络防火墙:
root@fl-imx6ull:~# udhcpc -i eth0 //自动分配IP,若以测试eth0网络正常,可不操作此步
root@fl-imx6ull:~# echo 1 > /proc/sys/net/ipv4/ip_forward //打开 IP 转发
root@fl-imx6ull:~# iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE//设置转发规则
设置WiFi的模式与IP
确保模块8723bu已经加载。
root@fl-imx6ull:~# ifconfig wlan0 up //打开WiFi
root@fl-imx6ull:~# ifconfig wlan0 192.168.0.10 netmask 255.255.255.0 //设置IP与子网掩码
root@fl-imx6ull:~# ifconfig wlan0 promisc //设置 wlan0 为混杂模式
开启AP
root@fl-imx6ull:~# udhcpd /etc/udhcpd/udhcpd.conf & //WiFi 地址、网关等配置信息
root@fl-imx6ull:~# hostapd -d /etc/hostapd/hostapd.conf & //加密方式、用户名、密码等设置
hostapd.conf文件中:ssid为用户名,/为密码
手机等移动终端可以通过WiFi连接到开发板的AP热点,iMX6ULL开发板默认使用以下用户名和密码:
热点名:forlinxtest密码:1234567890
步骤4:卸载已经加入内核的模块:
root@fl-imx6ull:~# rmmod 8723du
usbcore: deregistering interface driver rtl8723du
wlan0: CTRL-EVENT-DISCONNECTED bssid=04:d7:a5:f9:26:1d reason=0
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