Hi! I have some questions regarding the implementation of Packet Sinks with GNU Radio in general.
Since GNU Radio 3.6 there are some new blocks available like the Packet Encoder and the Packet Decoder. Also the Simple Framer Block. I haven't had success in utilizing them. I wonder whether there is an example available since it seems that mapping the Payload data is a larger issue. Especially together with a WX/QT Terminal Sink from GRC. My initial try (for which I tried to find a workaround without success) is as follows: https://gist.github.com/2763957 - this defines my Python block, that acts as a Sink. It uses a watcher thread to pull the PHY packets from the queue. And the bit-processing is within a C++ sink block. My problem is, that my module (cogra) cannot be imported due to the error, that I put in the comments. I don't understand why that is, but my C++ Sink implements the State Machine to check for Synchronization and Header Fields according to the IEEE 802.15.4 standard in this case. The linked Python class belongs to that module, too. - Which makes the import issue somewhat strange. I need to get access to the C++ block via Swig, and the C++ class is available already, after successful compilation. What is impossible is to import the module in Python to connect some Python frontend block with its C++ backend block. At least that is idea here. I wonder whether there is a simpler way - without the need of a state-machine, queue and watcher thread. The only thing I practically need is to map the demodulated bits into frames (of variable length). I don't think a full blown packet stack should be necessary or a queue data structure. I'd be happy if someone had a fix or a workaround. I'm not sure whether there is a simpler solution though. Best, Marius _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
