Re: [Discuss-gnuradio] QT Throw Bad Alloc on flowgraph startup

2019-04-26 Thread Tom McDermott
Thanks, Marcus. Of course it will not throw now after about 20+ attempts. (Does that smell like mis-aligned memory?). The display is still not showing the data traces until at run time I change the FFT size. I will continue playing with it until it gets back into the mode where it throws all the

Re: [Discuss-gnuradio] QT Throw Bad Alloc on flowgraph startup

2019-04-26 Thread Christoph Mayer
This may be related to https://github.com/gnuradio/gnuradio/issues/2407 Best regards Christoph On Fri, Apr 26, 2019 at 6:42 PM Marcus Müller (GNU Radio maintainer) wrote: > > Hi Tom, > > shoot, that sounds like we half-fixed a bug :( > How proficient are you with GDB? Could you get a backtrace?

Re: [Discuss-gnuradio] QT Throw Bad Alloc on flowgraph startup

2019-04-26 Thread (GNU Radio maintainer)
Hi Tom, shoot, that sounds like we half-fixed a bug :( How proficient are you with GDB? Could you get a backtrace? (maybe based on [1]?) Thank you! Marcus [1] https://wiki.gnuradio.org/index.php/TutorialsGDB On Fri, 2019-04-26 at 09:25 -0700, Tom McDermott wrote: > > I've had this problem inter

[Discuss-gnuradio] QT Throw Bad Alloc on flowgraph startup

2019-04-26 Thread Tom McDermott
I've had this problem intermittently for about a year. On starting the flowgraph it will terminate with QT Throw : Bad Alloc. Building different versions from about 3.7.10 ish to 3.7.latest will change whether or not it happens 100% of the time or 30% of the time. Today, I noticed that disablin

Re: [Discuss-gnuradio] Modulation order of FSK

2019-04-26 Thread Ron Economos
Instead of a UChar to Float block, you want to use a Chunks to Symbols block (with 1, 3, -1, -3 in the Symbol Table and Dimension = 1). Ron On 4/26/19 06:46, Batu Kaplan wrote: Dear Marcus, Thanks for your response. First of all, it is been a while for answering your response and I am sorry

Re: [Discuss-gnuradio] Modulation order of FSK

2019-04-26 Thread Batu Kaplan
Dear Marcus, Thanks for your response. First of all, it is been a while for answering your response and I am sorry about that. I could not try your solution until these days. Unfortunately, I still couldn't get over my problem on M-FSK modulation. When I try your solution, "bits to symbols and aft

Re: [Discuss-gnuradio] Two channel receiver

2019-04-26 Thread YENDstudio
Hello Kyeong, Thanks for the info; I will check more. It seems that some hardware modifications are required. Regards On Fri, Apr 26, 2019, 06:01 Kyeong Su Shin wrote: > Hello YENDstudio, > > I know that USRP 1 can take two RF daughterboards, but the effective > sampling rate of the device in

Re: [Discuss-gnuradio] Got a problem with the "Python Block", help!

2019-04-26 Thread Derek Kozel
Hi, You can use two (or more) copy blocks and have a variable enable or disable each one. If a copy block is disabled then non of the blocks after it will be run. Regards, Derek On 26/04/2019 01:48, H.W wrote: Thanks for your reply. I have got the warning too. I will find another way to do

Re: [Discuss-gnuradio] Shared resource for source and sink blocks

2019-04-26 Thread N. Benes
N. Benes: > what is the accepted best practice to have a source and a sink block > share a common resource? > In my case, the shared resource is a thread that does I/O and both > source/sink use it to interface to GNU Radio. [snip] > Is there a commonly accepted pattern to apply in this situation