osh / gr-eventstream

gr-eventstream is a set of GNU Radio blocks for creating precisely timed events and either inserting them into, or extracting them from normal data-streams precisely. It allows for the definition of high speed time-synchronous c++ burst event handlers, as well as bridging to standard GNU Radio Async PDU messages with precise timing easily.

http://deepsig.nl

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burst c-plus-plus event-handling extract-data extractor gnu-radio injection message-passing python radio signal-processing signaling-pathways synchronization synchronization-service synchronous timing-simulator

readme

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Copyright 2017 Tim O'Shea

This directory contains the GNU Radio Eventstream Out-of-Tree Synchronous Stream-Event Scheduler

These blocks are intended to help improve the translation of streams of data items into scheduled-finite length events occurring in the data streams in both directions.

es.sink provides the translation from stream to events
es.source provides the translation from events to streams
triggers cause events to be scheduled in es.source and es.sink block event queues.

Some examples of specific triggers included are,

es_trigger_edge_f: cause an event when float stream rises above a fixed threshold value
es_trigger_sample_timer: cause an event to occur on a periodic sample increment in the stream

handlers consume events and do some ammount of signal processing on them

Some example of specific handlers included are,

es_handler_print: print the event to STDOUT
es_handler_pdu: convert the event to a PDU and send it out a message port
es_handler_insert_vector: a source handler which populates an event window from a PMT vector
es_handler_file: a sink handler which writes event contents out to a file