[Discuss-gnuradio] Where to start in learning to develop and contribute to GNU Radio?

2014-04-11 Thread Ken Adams
I recently graduated with my degree in Computer Engineering, and the GNU Radio project is by far the most complex thing I've desired to work on. I'm looking for tips on how to get started learning GNU Radio from the ground up, build custom modules, and help develop the source. For example, an

[Discuss-gnuradio] Tips for improving file transfer data loss

2014-04-08 Thread Ken Adams
I'm looking for some tips on how to improve file transfer using two USRP's. I understand the method I'm using might be fairly crude, but I'm just starting out. Problem is I'm dropping a lot of data out of the file (receiving missing parts of a string and such). This gets really bad when one of

[Discuss-gnuradio] Dealing with TX/RX cross-talk on USRP

2014-04-05 Thread Ken Adams
I'm looking for tips on how to deal with the USRP TX/RX leakage. I'm transmitting with 30db (max) gain while trying to measure RSSI on the RX2 channel and experiencing about 40db of energy leakage from the TX/RX. My TX and RX chains are separated by 50MHz. Not sure how I can filter it out. I'm

[Discuss-gnuradio] Flow graph no exiting after head block termination [possibly packet encoder]

2014-01-29 Thread Ken Adams
Looking for an explanation, File Source - GMSK MOD - GMSK Demod - Head Block - File sinks Works fine, terminates after x number of bytes have been transferred and returns. However: File Source - Packet Encoder - GMSK MOD - GMSK Demod - Packet Decoder - File sinks Does not return after head

[Discuss-gnuradio] Restarting a flow graph after termination by a head block?

2014-01-28 Thread Ken Adams
How can you restart a flow graph after a head block kills it? For example, I want to do something like the following: tb.start() tb.wait() # head block will terminate ... do some reconfiguration ... tb.start() However, I get a seg fault if I ever try to call tb.start() after the head block

[Discuss-gnuradio] qa_fft_filter make test failed - seg fault

2014-01-21 Thread Ken Adams
How can we diagnose make test failures? All tests passed initially, but I had GRC disabled, so I recompiled everything w/ GRC enabled and this test failed. Also, is there a way to re-compile just parts of gnuradio, instead of recompiling everything? 99% of tests past, only qa_fft_filter failed

Re: [Discuss-gnuradio] Install: qa_volk_test_all fails on armv7

2014-01-14 Thread Ken Adams
Has there been any progress on this bug? Would this effect performance enough to cause The under run uUuUuU at 250k sample rate on a beaglebone black (1ghz arm v7- nothing running)? On Sunday, December 15, 2013, Tom Tsou wrote: On Sun, Dec 15, 2013 at 12:23 PM, Tom Rondeau

[Discuss-gnuradio] Install: qa_volk_test_all fails on armv7

2013-11-26 Thread Ken Adams
The volk test is failing on my gnuradio build on a Beaglebone Black (armv7h) running Arch Linux Arm. Configuration that failed to enable: gr-ctrlport *** disabled [do i need this?] gr-comedi *** disabled [don't need] gr-qtgui *** disabled [don't need] gr-documentation *** disabled [don't need]