Re: [Discuss-gnuradio] Packet Flowgraph and underflows

2015-08-09 Thread Wolfgang Nagele
Hi Julian, Thanks for this - after a bit of googling I managed to find that as well. Was a bit hard to get started but after fiddling with the block buffers got it running the way I need it. Also for reference - in the Osmocom sink the HackRF does not have the payload length implementation based

Re: [Discuss-gnuradio] Packet Flowgraph and underflows

2015-08-09 Thread Julian Arnold
Hi Wolfgang, sorry for the late reply. I'm not familiar with the HackRF but something that might be useful for you as it makes burst mode transmissions in GNU Radio more generic and hardware independent is Eventstream by Tim O'Shea [1]. It should be exactly what you were looking for. It kind of i

Re: [Discuss-gnuradio] Packet Flowgraph and underflows

2015-08-06 Thread Wolfgang Nagele
Hi Julian, Thanks for the pointer. I'm using a HackRF - doesn't look like the Osmocom sink supports the same construct. Any way of doing something like this in a more generic approach? Cheers, Wolfgang On Thu, Aug 6, 2015 at 8:50 PM, Julian Arnold wrote: > Hi Wolfgang, > > no, you do not need t

Re: [Discuss-gnuradio] Packet Flowgraph and underflows

2015-08-06 Thread Julian Arnold
Hi Wolfgang, no, you do not need to use something like a mute block. The functionality you are looking for is already build into UHD (I'm assuming you are using a USRP as your transmitting device) The UHD sink in GNU Radio is able to react to some specific stream tags [1] one of which is the leng

[Discuss-gnuradio] Packet Flowgraph and underflows

2015-08-06 Thread Wolfgang Nagele
Hi, I've been looking for a solution to this and can't seem to find any examples. If I have a flowgraph that transmits packets for instance from a TCP stream - if this TCP stream only receives data occasionally it will create underflows (showing up as U characters on STDOUT). What is the proper