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Edmiax EW-7811Un wireless suport on ZedBoard

Former Member

I just bought a wireless USB EW-7811Un nano adapter for my raspberry pi. On raspberry pi it was easy to configure it. What should i do to make it work on zedboard ?

I found this http://goo.gl/ePsq7 , but i have xilinux installed.

I downloaded the linux kernel from git://git.xilinx.com/linux-xlnx.git , configured it like in the link above (but used RTL8188 config options instead the Ralink configs).

And compiled it, and i obtained the zImage.

I replaced the working zImage from FAT32 partition from the SD card with my compiled zImage. Doing so, i only got the blue LED on, no output on vga display... so no luck this way.

  • 0

    Hi,

    Xillinux' kernel (actually Xillinux-1.1) was configured to support as many devices as possible. So did you just plug it into the board to see what happens?

    If it wasn't detected, did /var/log/syslog supply any useful information?

    And if it turns out that the kernel doesn't support that device, I would try to get a driver and compile it on the board. That's probably the shortest path.

       Eli

  • 0

    Here are some message parts from the syslog

    Jan  1 02:00:04 localhost kernel: [    2.480000] usb 1-1.3: new high-speed USB device number 4 using xusbps-ehci
    Jan  1 02:00:04 localhost kernel: [    2.590000] usb 1-1.3: New USB device found, idVendor=7392, idProduct=7811
    Jan  1 02:00:04 localhost kernel: [    2.590000] usb 1-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
    Jan  1 02:00:04 localhost kernel: [    2.600000] usb 1-1.3: Product: 802.11n WLAN Adapter
    Jan  1 02:00:04 localhost kernel: [    2.600000] usb 1-1.3: Manufacturer: Realtek
    Jan  1 02:00:04 localhost kernel: [    2.610000] usb 1-1.3: SerialNumber: 00e04c000001
    Jan  1 02:00:04 localhost kernel: [    2.700000] usb 1-1.4: new full-speed USB device number 5 using xusbps-ehci
    Jan  1 02:00:04 localhost kernel: [    2.810000] usb 1-1.4: New USB device found, idVendor=046d, idProduct=c52f

    ... details about logitech mouse...

    Jan  1 02:00:06 localhost kernel: [    6.070000] rtl8192cu: rtl8192cu: Chip version 0x10
    Jan  1 02:00:06 localhost kernel: [    6.100000] cfg80211: World regulatory domain updated:
    Jan  1 02:00:06 localhost kernel: [    6.100000] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
    Jan  1 02:00:06 localhost kernel: [    6.100000] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.100000] cfg80211:   (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.100000] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.100000] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.100000] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    Jan  1 02:00:06 localhost pulseaudio[1022]: [pulseaudio] server-lookup.c: Unable to contact D-Bus: org.freedesktop.DBus.Error.NotSupported: Unable to autolaunch a dbus-daemon without a $DISPLAY for X11
    Jan  1 02:00:06 localhost pulseaudio[1022]: [pulseaudio] main.c: Unable to contact D-Bus: org.freedesktop.DBus.Error.NotSupported: Unable to autolaunch a dbus-daemon without a $DISPLAY for X11
    Jan  1 02:00:06 localhost failsafe: Failsafe of 120 seconds reached.
    Jan  1 02:00:06 localhost kernel: [    6.320000] rtl8192cu: MAC address: 00:1f:1f:fe:c2:b1
    Jan  1 02:00:06 localhost kernel: [    6.320000] rtl8192cu: Board Type 0
    Jan  1 02:00:06 localhost kernel: [    6.350000] rtlwifi: rx_max_size 15360, rx_urb_num 8, in_ep 1
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: Updating information on frequency 2412 MHz for a 20 MHz width channel with regulatory rule:
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: Updating information on frequency 2417 MHz for a 20 MHz width channel with regulatory rule:
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: Updating information on frequency 2422 MHz for a 20 MHz width channel with regulatory rule:
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: Updating information on frequency 2427 MHz for a 20 MHz width channel with regulatory rule:
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: Updating information on frequency 2432 MHz for a 20 MHz width channel with regulatory rule:
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: Updating information on frequency 2437 MHz for a 20 MHz width channel with regulatory rule:
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: Updating information on frequency 2442 MHz for a 20 MHz width channel with regulatory rule:
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: Updating information on frequency 2447 MHz for a 20 MHz width channel with regulatory rule:
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: Updating information on frequency 2452 MHz for a 20 MHz width channel with regulatory rule:
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: Updating information on frequency 2457 MHz for a 20 MHz width channel with regulatory rule:
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: Updating information on frequency 2462 MHz for a 20 MHz width channel with regulatory rule:
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A mBi, 2000 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: Disabling freq 2467 MHz as custom regd has no rule that fits a 20 MHz wide channel
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: Disabling freq 2472 MHz as custom regd has no rule that fits a 20 MHz wide channel
    Jan  1 02:00:06 localhost kernel: [    6.350000] cfg80211: Disabling freq 2484 MHz as custom regd has no rule that fits a 20 MHz wide channel
    Jan  1 02:00:06 localhost kernel: [    6.360000] cfg80211: Ignoring regulatory request Set by core since the driver uses its own custom regulatory domain
    Jan  1 02:00:06 localhost kernel: [    6.360000] cfg80211: Calling CRDA for country: US
    Jan  1 02:00:06 localhost udev-configure-printer: add /module/lp
    Jan  1 02:00:06 localhost udev-configure-printer: Failed to get parent
    Jan  1 02:00:06 localhost kernel: [    6.440000] ieee80211 phy0: Selected rate control algorithm 'rtl_rc'
    Jan  1 02:00:06 localhost kernel: [    6.450000] init: failsafe main process (1612) killed by TERM signal
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: Updating information on frequency 2412 MHz for a 20 MHz width channel with regulatory rule:
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: Updating information on frequency 2417 MHz for a 20 MHz width channel with regulatory rule:
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: Updating information on frequency 2422 MHz for a 20 MHz width channel with regulatory rule:
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: Updating information on frequency 2427 MHz for a 20 MHz width channel with regulatory rule:
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: Updating information on frequency 2432 MHz for a 20 MHz width channel with regulatory rule:
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: Updating information on frequency 2437 MHz for a 20 MHz width channel with regulatory rule:
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: Updating information on frequency 2442 MHz for a 20 MHz width channel with regulatory rule:
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: Updating information on frequency 2447 MHz for a 20 MHz width channel with regulatory rule:
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: Updating information on frequency 2452 MHz for a 20 MHz width channel with regulatory rule:
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: Updating information on frequency 2457 MHz for a 20 MHz width channel with regulatory rule:
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: Updating information on frequency 2462 MHz for a 20 MHz width channel with regulatory rule:
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: 2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: Disabling freq 2467 MHz
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: Disabling freq 2472 MHz
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: Disabling freq 2484 MHz
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211: Regulatory domain changed to country: US
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211:   (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1700 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211:   (5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211:   (5490000 KHz - 5600000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211:   (5650000 KHz - 5710000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.460000] cfg80211:   (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm)
    Jan  1 02:00:06 localhost kernel: [    6.470000] usbcore: registered new interface driver rtl8192cu

    ....

    1 02:00:07 localhost NetworkManager[1702]:    SCPlugin-Ifupdown: init!
    Jan  1 02:00:07 localhost NetworkManager[1702]:    SCPlugin-Ifupdown: update_system_hostname
    Jan  1 02:00:08 localhost NetworkManager[1702]:    SCPluginIfupdown: management mode: unmanaged
    Jan  1 02:00:08 localhost NetworkManager[1702]:    SCPlugin-Ifupdown: devices added (path: /sys/devices/axi.0/e0002000.ps7-usb/xusbps-ehci.0/usb1/1-1/1-1.3/1-1.3:1.0/net/wlan0, iface: wlan0)
    Jan  1 02:00:08 localhost NetworkManager[1702]:    SCPlugin-Ifupdown: device added (path: /sys/devices/axi.0/e0002000.ps7-usb/xusbps-ehci.0/usb1/1-1/1-1.3/1-1.3:1.0/net/wlan0, iface: wlan0): no ifupdown configuration found.
    Jan  1 02:00:08 localhost NetworkManager[1702]:    SCPlugin-Ifupdown: devices added (path: /sys/devices/axi.0/e000b000.eth/net/eth0, iface: eth0)
    Jan  1 02:00:08 localhost NetworkManager[1702]:    SCPlugin-Ifupdown: device added (path: /sys/devices/axi.0/e000b000.eth/net/eth0, iface: eth0): no ifupdown configuration found.
    Jan  1 02:00:08 localhost NetworkManager[1702]:    SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/lo, iface: lo)
    Jan  1 02:00:08 localhost NetworkManager[1702]:    SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/lo, iface: lo): no ifupdown configuration found.
    Jan  1 02:00:08 localhost NetworkManager[1702]:    SCPlugin-Ifupdown: end _init.
    Jan  1 02:00:08 localhost NetworkManager[1702]: <info> Loaded plugin ifupdown: (C) 2008 Canonical Ltd.  To report bugs please use the NetworkManager mailing list.
    Jan  1 02:00:08 localhost NetworkManager[1702]: <info> Loaded plugin keyfile: (c) 2007 - 2010 Red Hat, Inc.  To report bugs please use the NetworkManager mailing list.
    Jan  1 02:00:08 localhost NetworkManager[1702]:    Ifupdown: get unmanaged devices count: 0
    Jan  1 02:00:08 localhost NetworkManager[1702]:    SCPlugin-Ifupdown: (841808) ... get_connections.
    Jan  1 02:00:08 localhost NetworkManager[1702]:    SCPlugin-Ifupdown: (841808) ... get_connections (managed=false): return empty list.
    Jan  1 02:00:08 localhost NetworkManager[1702]:    Ifupdown: get unmanaged devices count: 0

    ...

    Jan  1 02:00:08 localhost NetworkManager[1702]: <info> found WiFi radio killswitch rfkill0 (at /sys/devices/axi.0/e0002000.ps7-usb/xusbps-ehci.0/usb1/1-1/1-1.3/1-1.3:1.0/ieee80211/phy0/rfkill0) (driver (unknown))
    Jan  1 02:00:08 localhost NetworkManager[1702]: <info> WiFi enabled by radio killswitch; enabled by state file
    Jan  1 02:00:08 localhost NetworkManager[1702]: <info> WWAN enabled by radio killswitch; enabled by state file
    Jan  1 02:00:08 localhost NetworkManager[1702]: <info> WiMAX enabled by radio killswitch; enabled by state file
    Jan  1 02:00:08 localhost NetworkManager[1702]: <info> Networking is enabled by state file
    Jan  1 02:00:08 localhost NetworkManager[1702]: <info> (wlan0): using nl80211 for WiFi device control
    Jan  1 02:00:08 localhost NetworkManager[1702]: <warn> (wlan0): driver supports Access Point (AP) mode
    Jan  1 02:00:08 localhost NetworkManager[1702]: <info> (wlan0): new 802.11 WiFi device (driver: 'rtl8192cu' ifindex: 3)
    Jan  1 02:00:08 localhost NetworkManager[1702]: <info> (wlan0): exported as /org/freedesktop/NetworkManager/Devices/0
    Jan  1 02:00:08 localhost NetworkManager[1702]: <info> (wlan0): now managed
    Jan  1 02:00:08 localhost NetworkManager[1702]: <info> (wlan0): device state change: unmanaged -> unavailable (reason 'managed') [10 20 2]
    Jan  1 02:00:08 localhost NetworkManager[1702]: <info> (wlan0): bringing up device.
    Jan  1 02:00:08 localhost kernel: [    8.290000] rtl8192cu: MAC auto ON okay!
    Jan  1 02:00:08 localhost kernel: [    8.330000] rtl8192cu: Tx queue select: 0x05
    Jan  1 02:00:08 localhost kernel: [    8.330000] rtl8192c_common: Loading firmware file rtlwifi/rtl8192cufw.bin
    Jan  1 02:00:08 localhost kernel: [    8.330000] ------------[ cut here ]------------

    ....finally got the message

    Jan  1 02:02:26 localhost AptDaemon.NetMonitor: WARNING: Failed to determinate network state

    From the messages above looks like the MAC address of the device is detected.
    One more thing i noticed is that the message from lsusb is

    Edimax Technology Co., Ltd EW-7811Un 802.11n Wireless Adapter [Realtek RTL8188CUS]

    and the syslog messages are about rtl8192cu. Maybe the wrong driver is loaded?

  • 0

    The correct driver is loaded. I tried the usb dongle on my laptop, running Ubuntu 12.04, and running lsmod, same modules as on xilinux zedboad. And on my laptop the device works ok.

    So, i think xilinux supports this device, but i still can't configure it. 
    Tried this http://dembtech.blogspot.ie/2012/09/how-to-install-wifi-on-raspberry-pi.html ) and this http://pingbin.com/2012/12/setup-wifi-raspberry-pi/.

    After installing wicd i couldn't get the desktopt when executing startx.

  • 0

    First of all, please refrain from "apt-get upgrade" in case you tried that. That can cause a variety of problems on Xillinux.

    Anyhow, since your laptop runs Ubuntu 12.04, you should be able to compare the behaviors (and syslogs) of both.

    I would suggest trying to solve the problem in terms of Ubuntu in general, and not narrow it down typical embedded platform. What you have is a full Ubuntu distribution, so what is right for a desktop or laptop is probably also right on the Zedboard.

    Good luck,
       Eli