本文以飞凌嵌入式 OKMX6ULL-S 开发板为基础讲解,其它板卡请参考使用,本文主要讲解了 iMX6ULL 网络功能的测试,分为无线网络测试以及有线网络测试,通过本文您可以快速了解飞凌 iMX6ULL 开发板网络测试的全过程。

 

1、有线网络测试 1 基本命令测试 

每个开发板的网络使用环境未必相同,本节测试示例中,网络环境如下。实际使用中,请按照实际网络环境自行进行配置。

 

底板丝印 软件设备
NET1 eth1
NET2 eth0

 

 

OKMX6ULL-C 有 eth0、eth1 两路网卡。开机已设置默认 eth0、eth1 自动分配 IP。如果修改 IP 请修改 /etc/network/interfaces。

 

注意:eth1 与 eth0 不能用于同一个局域网。

 

下面以 eth0 为例进行命令说明。

 

① 在 Linux 系统下,使用 ifconfig 命令可以显示或配置网络设备,使用 ethtool 查询及设置网卡参数。

 

② 设置 IP 地址 ,查看当前网卡详情:

 

root@fl-imx6ull:~# ifconfig eth0 192.168.1.120

root@fl-imx6ull:~#ifconfig eth0

eth0      Link encap:Ethernet  HWaddr3A:D9:93:8E:A8:A4

         inet addr:192.168.1.120  Bcast:192.168.1.255  Mask:255.255.255.0

         inet6 addr: fe80::38d9:93ff:fe8e:a8a4%2124311408/64Scope:Link

         inet6 addr: fec0::38d9:93ff:fe8e:a8a4%2124311408/64Scope:Site

         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

         RX packets:28 errors:0 dropped:0 overruns:0 frame:0

         TX packets:63 errors:0 dropped:0 overruns:0 carrier:0

         collisions:0 txqueuelen:1000

         RX bytes:11550(11.2KiB)  TX bytes:11579(11.3KiB)

 

③ 动态分配 IP 地址

 

如果您的开发板与路由器连接,且路由器支持 DHCP 自动 IP 地址分配可以在超级终端里面输入命令:


 

root@fl-imx6ull:~#udhcpc -i eth0

udhcpc (v1.24.1) started

Sending discover...

Sending select for192.168.20.101...

Lease of 192.168.20.101 obtained, lease time 86400

/etc/udhcpc.d/50default: Adding DNS 222.222.222.222

 

用来动态获取 IP 地址,“-i” 参数用来指定网卡名称,飞凌 iMX6ULL 开发板有线网络的网卡名称为 eth0。

 

/etc/resolv.conf 文件中有 dns 服务器信息会被自动添加。

 

④ 修改 mac 地址:


 

root@fl-imx6ull:~#ifconfig eth0 hw ether 00:00:00:00:00:01

root@fl-imx6ull:~#ifconfig eth0

eth0      Link encap:Ethernet  HWaddr00:00:00:00:00:01

         inet addr:192.168.20.101  Bcast:192.168.20.255  Mask:255.255.255.0

         inet6 addr: fec0::38d9:93ff:fe8e:a8a4%2128292720/64Scope:Site

         inet6 addr: fec0::200:ff:fe00:1%2128292720/64Scope:Site

         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

         RX packets:85 errors:0 dropped:0 overruns:0 frame:0

         TX packets:118 errors:0 dropped:0 overruns:0 carrier:0

         collisions:0 txqueuelen:1000

         RX bytes:22942(22.4KiB)  TX bytes:22259(21.7KiB)

 

另外在 /forlinx/shell/mac.sh 中根据 uid 设置 MAC 地址,如果需要请添加到开机自启动脚本中。

 

⑤ 设置子网掩码:


 

root@fl-imx6ull:~#ifconfig eth0 netmask 255.255.255.0

root@fl-imx6ull:~#ifconfig eth0

eth0      Link encap:Ethernet  HWaddr00:00:00:00:00:01

         inet addr:192.168.20.101  Bcast:192.168.20.255  Mask:255.255.255.0

         inet6 addr: fec0::38d9:93ff:fe8e:a8a4%2128915312/64Scope:Site

         inet6 addr: fec0::200:ff:fe00:1%2128915312/64Scope:Site

        UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

         RX packets:107 errors:0 dropped:0 overruns:0 frame:0

         TX packets:118 errors:0 dropped:0 overruns:0 carrier:0

         collisions:0 txqueuelen:1000

         RX bytes:25700(25.0KiB)  TX bytes:22259(21.7KiB)

 

⑥ 设置广播地址


 

root@fl-imx6ull:~#ifconfig eth0 broadcast 192.168.20.120

root@fl-imx6ull:~#ifconfig eth0

eth0      Link encap:Ethernet  HWaddr00:00:00:00:00:01

         inet addr:192.168.20.101  Bcast:192.168.20.120  Mask:255.255.255.0

         inet6 addr: fec0::38d9:93ff:fe8e:a8a4%2123332464/64Scope:Site

         inet6 addr: fec0::200:ff:fe00:1%2123332464/64Scope:Site

         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

         RX packets:111 errors:0 dropped:0 overruns:0 frame:0

         TX packets:132 errors:0 dropped:0 overruns:0 carrier:0

         collisions:0 txqueuelen:1000

         RX bytes:26130(25.5KiB)  TX bytes:25947(25.3KiB)

 

⑦ 添加 / 删除默认网关

 

添加默认网关:


 

root@fl-imx6ull:~#route add default gw 192.168.20.1

 

删除默认网关:


 

root@fl-imx6ull:~#route del default gw 192.168.20.1

 

⑧ 关闭开启网卡

 

关闭 eth0 网卡:


 

root@fl-imx6ull:~#ifconfig eth0 down

 

开启 eth0 网卡:


 

root@fl-imx6ull:~#ifconfig eth0 up

fec 20b4000.ethernet eth0: Freescale FEC PHY driver [Micrel KSZ8081 or KSZ8091] (mii_bus:phy_addr=20b4000.ethernet:01, irq=-1)

root@fl-imx6ull:~# fec 20b4000.ethernet eth0: Link is Up- 100Mbps/Full- flow control rx/tx

 

2FTP 服务

 

① 设置 root 用户密码,这里设置为 forlinx,输入密码没有回显,串口终端无法看到输入内容。


 

root@imx6ullevk:~# passwd root

New password:

Re-enter new password:

 

 

② 然后配置开发板 ip 地址,保证和电脑通信正常。


 

root@imx6ullevk:~#ifconfig eth0 192.168.2.207

root@imx6ullevk:~#ping 192.168.2.135-c 3

 

 

③ 电脑使用 FileZilla 连接 iMX6ULL 开发板。 点击文件,站点管理器:

 

 

创建“新站点”,主机输入开发板 IP,加密方式选择只是用明文 FTP,登陆类型选择正常,用户和密码为开发板的用户和密码,点击“连接”。

 

 

3SSH 登录测试

 

以太网相关服务测试之前,确保已经设置好 IP。设置 IP 请参考以太网驱动测试部分。

 

配置信息:

 

开发板 ip:192.168.2.85

 

Linux 主机地址:192.168.2.149

 

Windows 主机地址:192.168.2.12

 

① 测试由 linux 主机通过 ssh 访问开发板


 

zs@developer-RH2485-V2:~$ssh root@192.168.2.85

The authenticity of host '192.168.2.85 (192.168.2.85)' can't be established.

RSA key fingerprint is 25:57:00:82:72:8f:09:8e:2d:b9:9b:41:e5:d6:06:bb.

Are you sure you want to continue connecting (yes/no)? y

Please type 'yes' or 'no': yes

Warning: Permanently added '192.168.2.85'(RSA) to the list of known hosts.

 

② 测试由 Windows 主机通过 cmd.exe 或者 Cmder 访问开发板:


 

$  ssh root@192.168.2.85

root@fl-imx6ull:~#

 

③ 由 iMX6ULL 开发板访问 linux 主机


 

root@fl-imx6ull:~#dbclient zs@192.168.2.149

Host'192.168.2.149' is not in the trusted hosts file.

(ecdsa-sha2-nistp256 fingerprint md5 93:ff:74:8a:ed:ba:fd:21:39:d9:87:93:ad:9e:19:6f)

Do you want to continue connecting? (y/n) y

zs@192.168.2.149's password:

Welcome to Ubuntu14.04.5 LTS (GNU/Linux4.4.0-31-generic x86_64)

* Documentation:  https://help.ubuntu.com/

504 packages can be updated.

421 updates are security updates.

New release '16.04.6 LTS' available.

Run'do-release-upgrade' to upgrade to it.

Last login: MonMar2312:50:222020 from 192.168.2.87

 

4USB 转网络测试

 

① 将 USB 转以太网插入 USB host 接口,识别信息如下:

 

usb 1-1.3: new high-speed USB device number 8 using ci_hdrc

 

asix 1-1.3:1.0 eth2: register 'asix' at usb-ci_hdrc.1-1.3, ASIX AX88772B USB 2.0 Ethernet, 00:0e:c6:8f:9c:b7

 

IPv6: ADDRCONF(NETDEV_UP): eth2: link is not ready

 

 

② 测试方法参考以太网驱动测试章节。

 

2、无线网络测试 1WIFI 测试

RTL8188eus—USB WIFI、RTL8723bu—USB WIFI 使用方法如下。

 

① USB WIFI RTL8188eus 使用

 

USB WIFI 无线局域网卡是选配模块。

 

步骤 1:开发板上电,启动 Linux 系统。

 

步骤 2:连接 USB WIFI 到飞凌开发板的 USB host 接口,正确安装如下图。

 

 

步骤 3:打开脚本所在的位置:


 

root@fl-imx6ull:~#cd /forlinx/shell/

 

步骤 4:按照如下格式输入相应的参数:

 

说明:

 

-s 表示 wifi 热点的名称

 

-p 表示密码,如果没有密码请输入 -p NONE

 

路由器采用 wpa 加密方式。

 

连接打印内容如下:


 

root@fl-imx6ull:/forlinx/shell#./wifi.sh -i 8188 -s forlinx -p xxxx

wifi 8188

ssid forlinx

pasw xxxx

usbcore: deregistering interface driver rtl8723bu

RTL871X: moduleexit start

usbcore: deregistering interface driver rtl8188eu

RTL871X: rtw_ndev_uninit(wlan1)

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

RTL871X: moduleexit success

RTL871X: module init start

RTL871X: rtl8188eu v4.3.0.9_15178.20150907

RTL871X: build time: Mar25202002:23:46

bFWReady == _FALSE call reset 8051...

RTL871X: rtw_ndev_init(wlan0)

usbcore: registered newinterface driver rtl8188eu

RTL871X: module init ret=0

==> rtl8188e_iol_efuse_patch

IPv6: ADDRCONF(NETDEV_UP): wlan0: link isnot read

ps: invalid option -- 'f'

BusyBox v1.24.1(2019-04-2702:24:01 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]: Operationnot permitted

ioctl[SIOCGIWSCAN]: Resource temporarily unavailable

ioctl[SIOCGIWSCAN]: Resource temporarily unavailable

RTL871X: indicate disassoc

wlan0: Trying to associate with04:d7:a5:84:fa:40(SSID='forlinx' freq=2437MHz)

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: Associatedwith04: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 with04:d7:a5:84:fa:40[PTKRTL871X: setgroup 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...

Sendingselectfor192.168.4.129...

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!

 

步骤 5:ping ip 或者域名,命令如下。


 

root@fl-imx6ull:/forlinx/shell#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:/forlinx/shell#rmmod 8188eu

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

 

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:

 

 

步骤 1:检查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:开发板上电,启动 Linux 系统。

 

步骤 3:进入测试脚本所在目录:


 

root@fl-imx6ull:~# cd /forlinx/shell

 

步骤 4:执行测试脚本:

 

说明:-s 表示 wifi 热点的名称;

 

-p 表示密码,如果没有密码请输入 -p NONE;

 

路由器采用 wpa 加密方式。

 

连接打印内容如下:


 

root@fl-imx6ull:/forlinx/shell#./wifi.sh -i 8723-sforlinx -pxxxx

wifi 8723

ssid forlinx

paswxxxx

usbcore: deregistering interface driver rtl8723bu

usbcore: registered new interface driver rtl8723bu

IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready

ps: invalid option -- 'f'

BusyBox v1.24.1(2019-04-2702:24:01 CST) multi-call binary.

Usage: ps

Successfully initialized wpa_supplicant

rfkill: Cannot open RFKILL control device

wlan0: Trying to associate with04:d7:a5:84:fa:40(SSID='forlinx' freq=2437MHz)

IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready

wlan0: Associatedwith04:d7:a5:84:fa:40

wlan0: WPA: Key negotiation completed with04:d7:a5:84:fa:40[PTK=CCMP GTK=CCMP]

wlan0: CTRL-EVENT-CONNECTED - Connection to 04:d7:a5:84:fa:40 completed [id=0 id_str=]

udhcpc (v1.24.1) started

Sending discover...

Sending discover...

Sending select for192.168.4.225...

Lease of 192.168.4.225 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!

 

步骤 5:ping ip 或者域名,命令如下。


 

root@fl-imx6ull:/forlinx/shell#ping -c 5192.168.4.1

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

 

步骤 6:卸载已经加入内核的模块:


 

root@fl-imx6ull:/forlinx/shell#rmmod 8723bu

usbcore: deregistering interface driver rtl8723bu

wlan0: CTRL-EVENT-DISCONNECTED bssid=04:d7:a5:84:fa:40 reason=0

 

34G 模块实现 IE 上网

 

① 将外扩 USB 4G 扩展板插入 USB 口,固定 ME909s-821 PCIE 封装 4G 模块,安装 ipex 天线座,插入 SIM 卡,开机上电。

 

② 拨号上网


 

root@fl-imx6ull:~#cd /forlinx/shell/

root@fl-imx6ull:/forlinx/shell#./me909s.sh

eth0      Link encap:Ethernet  HWaddr7E:09:81:93:F3:0A

eth1      Link encap:Ethernet  HWaddr DE:EA:3F:6C:A7:33

wlan0     Link encap:Ethernet  HWaddr7C:A7:B0:0F:FC:14

udhcpc (v1.24.1) started

Sending discover...

Sending select for10.63.223.158...

Lease of 10.63.223.158 obtained, lease time 518400

/etc/udhcpc.d/50default: Adding DNS 222.222.222.222

/etc/udhcpc.d/50default: Adding DNS 222.222.202.202

fec 20b4000.ethernet eth0: Freescale FEC PHY driver [Micrel KSZ8081 or KSZ8091] (mii_bus:phy_addr=20b4000.ethernet:01, irq=-1)

IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready

fec 2188000.ethernet eth1: Freescale FEC PHY driver [Micrel KSZ8081 or KSZ8091] (mii_bus:phy_addr=20b4000.ethernet:02, irq=-1)

IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready

Finished!

 

③ 连接成功之后,ping 百度测试:


 

root@fl-imx6ull:/forlinx/shell#ping www.baidu.com

PING www.baidu.com (220.181.38.150): 56 data bytes

64 bytes from 220.181.38.150: seq=0 ttl=53 time=59.450 ms

64 bytes from 220.181.38.150: seq=1 ttl=53 time=71.086 ms

64 bytes from 220.181.38.150: seq=2 ttl=53 time=57.385 ms

64 bytes from 220.181.38.150: seq=3 ttl=53 time=71.033 ms

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

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

round-trip min/avg/max = 57.385/64.738/71.086 ms

 

④ 断网与复位指令测试:

 

断开网络连接:


 

root@fl-imx6ull:/forlinx/shell#echo "AT^NDISDUP=1,0"> /dev/ttyUSB2

 

复位重启模块:


 

root@fl-imx6ull:/forlinx/shell#echo "AT^RESET "> /dev/ttyUSB2

 

⑤ 更换 SIM 卡需要更换 me909.sh 中相应的 APN:

 

中国移动:


 

echo "AT^NDISDUP=1,1,\"cmnet\""> /dev/ttyUSB2

 

中国联通:


 

echo "AT^NDISDUP=1,1,\"3gnet\""> /dev/ttyUSB2

 

中国电信(本文使用):


 

echo "AT^NDISDUP=1,1,\"ctnet\""> /dev/ttyUSB2

 

4GPRS 模块测试

 

GPRS 模块与开发板之间采用串口连接,客户可以使用飞凌公司自产的 GPRS 模块,也可以使用自己购买的串口 GPRS 模块。

 

① 在确保模块和开发板串口 UART3 连接、上电 OK 情况下, 启动开发板子,进入命令行终端输入如下命令。


 

root@fl-imx6ull:~#cd /forlinx/shell/

root@fl-imx6ull:~#pppd call gprs /dev/ttymxc2 &

[1] 638

root@fl-imx6ull:/etc/ppp/peers# timeout set to 15 seconds

abort on (\nDELAYED\r)

abort on (\nBUSY\r)

abort on (\nERROR\r)

abort on (\nNO DIALTONE\r)

abort on (\nNO CARRIER\r)

send (^MAT^M)

expect (OK)

AT^M^M

OK

-- got it

send (ATS0=0^M)

expect (OK)

^M

ATS0=0^M^M

OK

-- got it

send (ATE0V1^M)

expect (OK)

^M

ATE0V1^M^M

OK

-- got it

send (AT+CGDCONT=1,"IP","CMNET"^M)

expect (OK)

^M

^M

OK

-- got it

send (ATDT*99***1#^M)

expect (CONNECT)

^M

^M

CONNECT

-- got it

send (^M)

Script/usr/sbin/chat -s -v -f /etc/ppp/peers/chat-gprs-connect finished (pid 639), status = 0x0

Serial connection established.

using channel 1

Using interface ppp0

Connect: ppp0 <--> /dev/ttymxc2

sent [LCP ConfReq id=0x1 ]

rcvd [LCP ConfReq id=0x1 ]

No auth is possible

sent [LCP ConfRej id=0x1]

rcvd [LCP ConfRej id=0x1 ]

sent [LCP ConfReq id=0x2]

rcvd [LCP ConfReq id=0x2 ]

No auth is possible

sent [LCP ConfRej id=0x2]

rcvd [LCP ConfAck id=0x2]

rcvd [LCP ConfReq id=0x3]

sent [LCP ConfAck id=0x3]

sent [IPCP ConfReq id=0x1 ]

sent [IPCP ConfReq id=0x1 ]

sent [IPCP ConfReq id=0x1 ]

sent [IPCP ConfReq id=0x1 ]

rcvd [IPCP ConfReq id=0x1]

sent [IPCP ConfAck id=0x1]

rcvd [IPCP ConfRej id=0x1]

sent [IPCP ConfReq id=0x2 ]

rcvd [IPCP ConfNak id=0x2 ]

sent [IPCP ConfReq id=0x3 ]

rcvd [IPCP ConfAck id=0x3 ]

not replacing existing default route via 192.168.1.1with metric -1

local  IP address 10.131.70.33

remote IP address 192.200.1.21

primary   DNS address 111.11.1.3

secondary DNS address 111.11.11.3

 

② 连接成功可以尝试 ping 一下 www.forlinx.com


 

root@fl-imx6ull:~#ping www.forlinx.com

PING www.forlinx.com (39.156.66.18): 56 data bytes

64 bytes from 39.156.66.18: seq=0 ttl=51 time=315.605 ms

64 bytes from 39.156.66.18: seq=1 ttl=51 time=732.351 ms

64 bytes from 39.156.66.18: seq=2 ttl=51 time=234.874 ms

64 bytes from 39.156.66.18: seq=3 ttl=51 time=2990.813 ms

64 bytes from 39.156.66.18: seq=4 ttl=51 time=2110.219 ms

64 bytes from 39.156.66.18: seq=5 ttl=51 time=1151.022 ms

64 bytes from 39.156.66.18: seq=6 ttl=51 time=450.403 ms

64 bytes from 39.156.66.18: seq=7 ttl=51 time=4650.867 ms

64 bytes from 39.156.66.18: seq=8 ttl=51 time=3747.240 ms

64 bytes from 39.156.66.18: seq=9 ttl=51 time=2866.635 ms

64 bytes from 39.156.66.18: seq=10 ttl=51 time=1986.155 ms

64 bytes from 39.156.66.18: seq=11 ttl=51 time=1087.178 ms

64 bytes from 39.156.66.18: seq=12 ttl=51 time=368.113 ms

--- www.forlinx.com ping statistics ---

13 packets transmitted, 13 packets received, 0% packet loss

round-trip min/avg/max = 234.874/1745.498/4650.867 ms

 

注意: 假如 ping 命令不通,可能是之前测试以太网或无线网络接口时的一些配置的影响,此时需要先执行以下命令再测试模块:


 

root@imx6ulevk:~# ifconfig eth0 down

root@imx6ulevk:~#ifconfig wlan0 down