Changes between Version 7 and Version 8 of Tutorials/k0SDR/Tutorial00

Timestamp:

Aug 29, 2012, 2:46:45 PM (12 years ago)

Author:

nilanjan

Comment:

—

Tutorials/k0SDR/Tutorial00

@@ -278 +278 @@
 }}}
 
-* Play around with the options on tx_waveforms and verify the corresponding change in the received frequency spectrum. To view all optionsdo the following:
+ * Play around with the options on tx_waveforms and verify the corresponding change in the received frequency spectrum. To view all optionsdo the following:
 {{{
 root@node1-1:~/uhd/host/build/examples# ./tx_waveforms --help
@@ -286 +286 @@
 
 == Troubleshooting ==
- * ''uhd_find_devices'' & ''uhd_usrp_probe '' return No UHD Devices Found
+ * ''uhd_find_devices'' & ''uhd_usrp_probe '' return '''No UHD Devices Found'''
+
+  If problems arise when trying find and probe the device, it's most likely the case that interface between the node and USRP2 needs to be reconfigured. In most scenarios, if finding the USRP2s fails it should return the following for ''uhd_find_devices''
+{{{
+root@node1-1:~# uhd_find_devices
+linux; GNU C++ version 4.6.1; Boost_104601; UHD_003.004.003-0-unknown
+
+No UHD Devices Found
+}}}
+
+  The USRP2 has an ethernet interface (ip address: 192.168.10.2) to the node's eth2 interface (ip address: 192.168.10.1). To verify the nodes interface configuration:
+{{{
+root@node1-1:~# ifconfig eth2
+eth2      Link encap:Ethernet  HWaddr 00:03:1d:07:49:5c
+          inet addr:192.168.10.1  Bcast:192.168.10.255  Mask:255.255.255.0
+          inet6 addr: fe80::203:1dff:fe07:495c/64 Scope:Link
+          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
+          RX packets:4 errors:0 dropped:0 overruns:0 frame:0
+          TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
+          collisions:0 txqueuelen:1000
+          RX bytes:370 (370.0 B)  TX bytes:862 (862.0 B)
+          Interrupt:17 Memory:fdce0000-fdd00000
+}}}
+
+  If the interface is not configured, then do then following:
+{{{
+root@node1-1:~# ifconfig eth2 192.168.10.1 netmask 255.255.255.0 up
+}}}
+
+  The USRP2 ip-address is 192.168.10.2. Now try pinging the USRP2.
+{{{
+root@node1-1:~# ping 192.168.10.2
+PING 192.168.10.2 (192.168.10.2) 56(84) bytes of data.
+64 bytes from 192.168.10.2: icmp_req=1 ttl=32 time=1.04 ms
+64 bytes from 192.168.10.2: icmp_req=2 ttl=32 time=1.00 ms
+64 bytes from 192.168.10.2: icmp_req=3 ttl=32 time=1.04 ms
+64 bytes from 192.168.10.2: icmp_req=4 ttl=32 time=1.05 ms
+64 bytes from 192.168.10.2: icmp_req=5 ttl=32 time=1.04 ms
+}}}
+
+  At this point the node and USRP2 are able to see each other. Now retry finding and probing the USRPs.
+