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EEPW首頁(yè) > 博客 > 應(yīng)用技巧-OKMX6UL-C開發(fā)板無線網(wǎng)絡(luò)測(cè)試

應(yīng)用技巧-OKMX6UL-C開發(fā)板無線網(wǎng)絡(luò)測(cè)試

發(fā)布人:閃電阿飛 時(shí)間:2022-05-05 來源:工程師 發(fā)布文章
FETMX6ULL-C核心板基于NXP i.MX6ULL處理器開發(fā)設(shè)計(jì),采用低功耗的ARM Cortex-A7架構(gòu),運(yùn)行速度高達(dá)800MHz。原生支持8路UART、2路Ethernet、2路CAN總線、2路USB 、LCD等常用接口。并采用超小尺寸設(shè)計(jì),核心板尺寸僅40*29mm,適應(yīng)更多體積受限的應(yīng)用場(chǎng)景


iMX6ULL核心板


為了方便用戶對(duì)核心板的性能及功能進(jìn)行測(cè)試,飛凌提供了配套的功能評(píng)估板,將產(chǎn)品開發(fā)過程中常用的功能接口引出,比如說2路的Ethernet、2路的USB、2路的CAN以及4路的UART、2路的SPI2路的IIC,同時(shí)這里還預(yù)留了顯示的LCD接口以及4G模組、WIFI模組的插槽等。



本文以用戶快速熟悉產(chǎn)品,了解接口功能和測(cè)試方法為目的,主要講述了飛凌iMX6ULL開發(fā)板WIFI接口功能的測(cè)試方法,以及使用過程中出現(xiàn)的一些問題如何排查。在測(cè)試過程中,對(duì)一些命令進(jìn)行了注釋,方便用戶理解,以實(shí)用夠用為主。

 

 

一、iMX6ULL開發(fā)板 WIFI 功能測(cè)試


WiFi支持:

模塊

支持

RTL8188EUS

WiFi

RTL8723BU

WiFi

RTL8723DU

WiFi


1、 USB WIFI RTL8188eus使用

說明: USB  WIFI無線局域網(wǎng)卡是選配模塊 ,如若有需求,請(qǐng)聯(lián)系飛凌嵌入式官網(wǎng)在線客服。

以下對(duì)wifi模塊在STA模式下,連接到無線網(wǎng)絡(luò)的測(cè)試:

步驟1:iMX6ULL開發(fā)板上電,啟動(dòng)Linux系統(tǒng)。

步驟2:連接USB WIFI到飛凌iMX6ULL開發(fā)板的USB Host接口

步驟 3 按照如下格式輸入相應(yīng)的參數(shù):  

-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。

連接打印內(nèi)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?)?????F|?T??vZ.c3?????<????] 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!

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

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(cè)試描述:

步驟3:測(cè)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(cè)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 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信號(hào)

查看WiFi信號(hào)方法如下:

root@fl-imx6ull:~# cat /proc/net/wireless | grep wlan0 | awk '{print $3}' //獲取信號(hào)強(qiáng)度

78.

root@fl-imx6ull:~# cat /proc/net/wireless | grep wlan0 | awk '{print $4}' //獲取信號(hào)質(zhì)量,單位dBm

-68.

root@fl-imx6ull:~# cat /proc/net/wireless | grep wlan0 | awk '{print $5}' //網(wǎng)口背景噪聲,單位dBm

-256.

AP模式

說明:

l  本模塊支持AP模式,理論最大連接用戶為8個(gè)。

l  本例為以太網(wǎng)eth0連接路由器說明,配置完以太網(wǎng)后,需要測(cè)試eth0是否可以連接外網(wǎng),如果可以連接外網(wǎng)(方法參考 “有線網(wǎng)卡”章節(jié)),請(qǐng)繼續(xù)按照操作步驟執(zhí)行,如果不可以請(qǐng)檢查以太網(wǎng)或者路由器連接是否正常。

工作在AP模式下,手機(jī)等設(shè)備可以直接連接模塊。

設(shè)置以太網(wǎng)IP,配置網(wǎng)絡(luò)防火墻:

root@fl-imx6ull:~# udhcpc -i eth0     //自動(dòng)分配IP,若以測(cè)試eth0網(wǎng)絡(luò)正常,可不操作此步

root@fl-imx6ull:~# echo 1 > /proc/sys/net/ipv4/ip_forward                   //打開 IP 轉(zhuǎn)發(fā)

root@fl-imx6ull:~# iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE//設(shè)置轉(zhuǎn)發(fā)規(guī)則

設(shè)置WiFi的模式與IP

確保模塊8723bu已經(jīng)加載。

root@fl-imx6ull:~# ifconfig wlan0 up                                         //打開WiFi

root@fl-imx6ull:~# ifconfig wlan0 192.168.0.10 netmask 255.255.255.0  //設(shè)置IP與子網(wǎng)掩碼

root@fl-imx6ull:~# ifconfig wlan0 promisc                        //設(shè)置 wlan0 為混雜模式

開啟AP

root@fl-imx6ull:~# udhcpd /etc/udhcpd/udhcpd.conf &                 //WiFi 地址、網(wǎng)關(guān)等配置信息

root@fl-imx6ull:~# hostapd -d /etc/hostapd/hostapd.conf &   //加密方式、用戶名、密碼等設(shè)置

hostapd.conf文件中:ssid為用戶名,/為密碼

手機(jī)等移動(dòng)終端可以通過WiFi連接到開發(fā)板的AP熱點(diǎn),iMX6ULL開發(fā)板默認(rèn)使用以下用戶名和密碼:

熱點(diǎn)名:forlinxtest密碼:1234567890

步驟4:卸載已經(jīng)加入內(nèi)核的模塊:

root@fl-imx6ull:~# rmmod 8723du

usbcore: deregistering interface driver rtl8723du

wlan0: CTRL-EVENT-DISCONNECTED bssid=04:d7:a5:f9:26:1d reason=0

 

 

FETMX6ULL-C核心板是飛凌基于NXP i.MX6U系列處理器推出的第三款核心板,成熟的技術(shù)方案,帶來穩(wěn)定可靠的全新體驗(yàn)。核心板尺寸僅40*29mm,并采用2mm合高的板對(duì)板連接器,將小體積、便于拆卸的優(yōu)勢(shì)集一身。您可搜索飛凌嵌入式,聯(lián)系在線客服,獲取更多詳細(xì)資料。


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關(guān)鍵詞: 開發(fā)板 飛凌 OKMX6UL-C

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