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Diffstat (limited to 'host/docs/usrp2.rst')
| -rw-r--r-- | host/docs/usrp2.rst | 46 |
1 files changed, 34 insertions, 12 deletions
diff --git a/host/docs/usrp2.rst b/host/docs/usrp2.rst index 2ee49646f..70101bd87 100644 --- a/host/docs/usrp2.rst +++ b/host/docs/usrp2.rst @@ -81,7 +81,7 @@ The safe-mode button is a pushbutton switch (S2) located inside the enclosure. To boot into the safe image, hold-down the safe-mode button while power-cycling the device. Continue to hold-down the button until the front-panel LEDs blink and remain solid. -When in safe-mode, the USRP-N Series will always have the IP address 192.168.10.2 +When in safe-mode, the USRP-N device will always have the IP address 192.168.10.2 ------------------------------------------------------------------------ Setup networking @@ -154,31 +154,53 @@ Run the following commands: cd <prefix>/share/uhd/utils sudo ./usrp2_recovery.py --ifc=eth0 --new-ip=192.168.10.3 +------------------------------------------------------------------------ +Communication problems +------------------------------------------------------------------------ +When setting up a development machine for the first time, +you may have various difficulties communicating with the USRP device. +The following tips are designed to help narrow-down and diagnose the problem. + ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -Debugging networking problems +Firewall issues ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -**Disable the firewall:** -If uhd_find_devices gives you nothing -but uhd_find_devices --args addr=192.168.10.2 yeilds a discovered device, +When the IP address is not specified, +the device discovery sends broadcast UDP packets from each ethernet interface. +Many firewalls will block the replies to these broadcast packets. +If disabling your system's firewall, +or specifying the IP address yeilds a discovered device, then your firewall may be blocking replies to UDP broadcast packets. +If this is the case, we recommend that you disable the firewall, +or create a rule to allow all incoming packets with UDP source port 49152. + +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Ping the device +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +The USRP will reply to icmp echo requests. +A successful ping response means that the device has booted properly, +and that it is using the expected IP address. -**Ping the USRP2:** -The USRP2 will reply to icmp echo requests. :: ping 192.168.10.2 -**Monitor the serial output:** +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Monitor the serial output +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Read the serial port to get debug verbose from the embedded microcontroller. -Use a standard USB to 3.3v-level serial converter at 230400 baud. The microcontroller prints useful information about IP addresses, -MAC addresses, control packets, and fast-path settings. +MAC addresses, control packets, fast-path settings, and bootloading. +Use a standard USB to 3.3v-level serial converter at 230400 baud. +Connect GND to the converter ground, and connect TXD to the converter receive. +The RXD pin can be left unconnected as this is only a one-way communication. * **USRP2:** Serial port located on the rear edge * **N210:** Serial port located on the left side -**Monitor the host network traffic:** -Use wireshark to monitor packets sent to and received from the USRP2. +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Monitor the host network traffic +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Use wireshark to monitor packets sent to and received from the device. ------------------------------------------------------------------------ Addressing the device |