[Discuss-gnuradio] bbn_80211b_tap.py with tcpdump or wireshark

2009-02-21 Thread Jane Chen
Hi all,   I ran the bbn_80211b_tap.py.  I used both tcpdump and wireshark to try to  capture the packets. However, it doesn't work.   My steps: 1. ./bbn_80211b_tap.py. 2.ifconfig gr0 192.168.111.2 3. tcpdump -i gr0 -e -X   I have no idea what's wrong.   Could anyone please help me to capture the 8

Re: [Discuss-gnuradio] Beacon frames of BBN 802.11

2009-02-21 Thread Jane Chen
Thank you for your reply!  I ran the ./bbn_80211b_tap.py and then I  used Ctrl-C to stop the bbn_80211b_tap.py.  After that I ran ./bbn_80211b_tap.py again. However, I got the error as follows: bbn_tap: created tap device gr1 usrp_open_interface:usb_claim_interface: failed interface 1 could not

[Discuss-gnuradio] Communication between usrp2 and usrp1

2009-02-21 Thread Smith L.
Hi, I want to establish wireless communication between usrp1 and usrp2. I know that for communication between two usrp1s can be established by running benchmark_tx.py on one host computer and benchmark_rx.py on another host computer. Is it possible to use benchmark_tx.py and benchmark_rx.py for u

Re: [Discuss-gnuradio] Adding functionality to a GRC-generated flowgraph

2009-02-21 Thread Josh Blum
Not entirely sure what you talking about, but you can add a custom block wrapper for basically anything. It doesnt have to be a real gr block. Make a custom block wrapper without any inputs or outputs, and put your special code in the blah that instantiates your object. A good example is the x

[Discuss-gnuradio] Adding functionality to a GRC-generated flowgraph

2009-02-21 Thread Marcus D. Leech
Josh, etc al: What is the best way to "tack on" functionality to a GRC-generated flowgraph--that is, things that are outside of the Gnu Radio "environment" but still important to your application. I'd like to add things like a timeout function that "does things" from time to time, as well as ot