[Discuss-gnuradio] Missing Length Tag

2019-05-30 Thread Mark Gannet
Hello, I'm trying to solve a problem that when I start/stop my flowgraph to reconfigure recording to file, a fatal error regarding missing tag length is posted by the tagged stream to pdu block. This block follows a stream to tagged stream block. It's the problem that this person was having in

[Discuss-gnuradio] Missing Length Tag - tagged_stream_to_pdu

2019-05-23 Thread Mark Gannet
Hello, I'm encountering an error in my flowgraph that involves tag propagation when stopping/starting. The flowgraph has a USRP connected to file meta sinks. The USRP can be switched by the user to stream to a null sink when recording of data is not required. When this happens, the file sinks

Re: [Discuss-gnuradio] UDP Sink Broadcast

2019-03-18 Thread Mark Gannet
The make method in udp_sink doesn't allow for broadcast right? On Mon, Mar 18, 2019 at 1:38 PM Mark Gannet wrote: > Hi, > > Does anybody know of a way to broadcast to a UDP Sink block? A unicast > works fine but setting the destination address to 172.168.255.255 always > giv

[Discuss-gnuradio] UDP Sink Broadcast

2019-03-18 Thread Mark Gannet
Hi, Does anybody know of a way to broadcast to a UDP Sink block? A unicast works fine but setting the destination address to 172.168.255.255 always gives a permission denied error even when running as su. The firewall zone for all adapters is set to "trusted." Is there a way to set an

Re: [Discuss-gnuradio] Custom Block to Output Items that Meet Criteria

2019-03-08 Thread Mark Gannet
ut buffer. general_work() gets > the size of your input and output buffers from ninput_items and > noutput_items. Perfectly fine to return a smaller value than requested. > > Nick > > On Wed, Mar 6, 2019 at 5:43 PM Mark Gannet wrote: > >> Is it possible to write a custom block tha

[Discuss-gnuradio] Custom Block to Output Items that Meet Criteria

2019-03-06 Thread Mark Gannet
Is it possible to write a custom block that only copies items to the output buffer if they meet a certain criterion? I'm thinking of something like a "keep m of n" block but where there is no knowledge of the number of items that will be written to the output buffer when entering the work

[Discuss-gnuradio] Using a Trigger Event to Process Subset of Samples in the Data Stream

2019-01-23 Thread Mark Gannet
Hello, I'm using a channel on an x310 to sample the analog receiver on a radar system and store the data continuously on a host PC running CentOS 7. The other channel on the x310 is used to collect timing signals (like a transmit trigger signal) via the GPIO header on a basic Rx daughterboard