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diff --git a/host/docs/usrp2.rst b/host/docs/usrp2.rst index 1de61b734..48ef60683 100644 --- a/host/docs/usrp2.rst +++ b/host/docs/usrp2.rst @@ -61,3 +61,68 @@ Load the firmware image: cd <uhd-repo-path>/firmware/microblaze directory sudo ./u2_flash_tool --dev=/dev/sd<XXX> -t s/w -w <path_to_firmware_image> + +------------------------------------------------------------------------ +Setup networking +------------------------------------------------------------------------ +The USRP2 only supports gigabit ethernet, and +will not work with a 10/100 Mbps interface. +Because the USRP2 uses gigabit ethernet pause frames for flow control, +you cannot use multiple USRP2s with a switch or a hub. +It is recommended that each USRP2 be plugged directly into its own +dedicated gigabit ethernet interface on the host computer. + +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Setup the host interface +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +The USRP2 communicates at the IP/UDP layer over the gigabit ethernet. +The default IP address of the USRP2 is **192.168.10.2** +You will need to configure the host's ethernet interface with a static IP address to enable communication. +An address of **192.168.10.1** is recommended. + +**Note:** +When using the UHD, if an IP address for the USRP2 is not specified, +the software will use UDP broadcast packets to locate the USRP2. +On some systems, the firewall will block UDP broadcast packets. +It is recommended that you change or disable your firewall settings. + +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Change the USRP2's IP address +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +You may need to change the USRP2's IP address for several reasons: + +* to satisfy your particular network configuration +* to use multiple USRP2s on the same host computer +* to set a known IP address into USRP2 (in case you forgot) + +**Method 1:** +To change the USRP2's IP address +you must know the current address of the USRP2, +and the network must be setup properly as described above. +Run the following commands: +:: + + cd <prefix>/share/uhd/utils + ./usrp_burner --addr=192.168.10.2 --new-ip=192.168.10.3 + +**Method 2 (Linux Only):** +This method assumes that you do not know the IP address of your USRP2. +It uses raw ethernet packets to bypass the IP/UDP layer to communicate with the USRP2. +Run the following commands: +:: + + cd <prefix>/share/uhd/utils + ./usrp2 recovery.py --ifc=eth0 --new-ip=192.168.10.3 + +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Debugging networking problems +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +**Monitor the USRP2:** +You can read the serial port on the rear of the USRP2 +to get debug verbose from the embedded microcontroller. +Use a standard USB to tty-level serial converter at 230400 baud. +The microcontroller prints useful information about IP addresses, +MAC addresses, control packets, and fast-path settings. + +**Monitor the host network traffic:** +Use wireshark to monitor packets send to and received from the USRP2. |