Add getters/setters in preamble/slicer, bring them out to radio.py via pubsub.
This commit is contained in:
Nick Foster
parent
2ace332b89
commit
f62813f039
@ -24,7 +24,6 @@ from optparse import OptionParser
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import time, os, sys, threading
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from string import split, join
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import air_modes
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import csv
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from air_modes.exceptions import *
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import zmq
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@ -55,6 +54,7 @@ class screen_printer(threading.Thread):
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self._subscriber.close()
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self.finished.set()
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#todo: maybe move plugins to separate programs (flightgear, SBS1, etc.)
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def main():
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my_position = None
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usage = "%prog: [options]"
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@ -64,8 +64,8 @@ def main():
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help="filename for Google Earth KML output")
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parser.add_option("-P","--sbs1", action="store_true", default=False,
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help="open an SBS-1-compatible server on port 30003")
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parser.add_option("-w","--raw", action="store_true", default=False,
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help="open a server outputting raw timestamped data on port 9988")
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parser.add_option("-s","--servers", type="string", default="",
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help="specify additional servers from which to take data in format tcp://x.x.x.x:y,tcp://....")
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parser.add_option("-n","--no-print", action="store_true", default=False,
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help="disable printing decoded packets to stdout")
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parser.add_option("-l","--location", type="string", default=None,
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@ -74,17 +74,19 @@ def main():
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help="Use UDP source on specified port")
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parser.add_option("-m","--multiplayer", type="string", default=None,
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help="FlightGear server to send aircraft data, in format host:port")
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parser.add_option("-t","--tcp", type="int", default=None,
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help="Open a TCP server on this port to publish reports")
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(options, args) = parser.parse_args()
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#construct the radio
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context = zmq.Context(1)
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tb = air_modes.modes_radio(options, context)
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relay = air_modes.zmq_pubsub_iface(context, subaddr="inproc://modes-radio-pub", pubaddr=None)
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servers = options.servers.split(",") + ["inproc://modes-radio-pub"]
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relay = air_modes.zmq_pubsub_iface(context, subaddr=servers[-1], pubaddr=None)
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if options.location is not None:
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reader = csv.reader([options.location], quoting=csv.QUOTE_NONNUMERIC)
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my_position = reader.next()
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my_position = [float(n) for n in options.location.split(",")]
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if options.kml is not None:
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dbname = 'adsb.db'
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@ -57,6 +57,10 @@ public:
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gr_vector_int &ninput_items,
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gr_vector_const_void_star &input_items,
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gr_vector_void_star &output_items);
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void set_rate(int channel_rate);
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void set_threshold(float threshold_db);
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float get_threshold(void);
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};
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#endif /* INCLUDED_AIR_MODES_PREAMBLE_H */
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@ -53,6 +53,8 @@ public:
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int work (int noutput_items,
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gr_vector_const_void_star &input_items,
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gr_vector_void_star &output_items);
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void set_rate(int channel_rate);
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};
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#endif /* INCLUDED_AIR_MODES_slicer_H */
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@ -42,14 +42,8 @@ air_modes_preamble::air_modes_preamble(int channel_rate, float threshold_db) :
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gr_make_io_signature2 (2, 2, sizeof(float), sizeof(float)), //stream 0 is received data, stream 1 is moving average for reference
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gr_make_io_signature (1, 1, sizeof(float))) //the output packets
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{
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d_chip_rate = 2000000; //2Mchips per second
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d_samples_per_chip = channel_rate / d_chip_rate; //must be integer number of samples per chip to work
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d_samples_per_symbol = d_samples_per_chip * 2;
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d_check_width = 120 * d_samples_per_symbol; //only search to this far from the end of the stream buffer
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d_threshold_db = threshold_db;
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d_threshold = powf(10., threshold_db/20.); //the level that the sample must be above the moving average in order to qualify as a pulse
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d_secs_per_sample = 1.0 / channel_rate;
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set_output_multiple(1+d_check_width*2);
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set_rate(channel_rate);
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set_threshold(threshold_db);
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std::stringstream str;
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str << name() << unique_id();
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@ -58,6 +52,27 @@ air_modes_preamble::air_modes_preamble(int channel_rate, float threshold_db) :
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set_history(d_samples_per_symbol);
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}
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void air_modes_preamble::set_rate(int channel_rate)
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{
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d_chip_rate = 2000000; //2Mchips per second
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d_samples_per_chip = channel_rate / d_chip_rate; //must be integer number of samples per chip to work
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d_samples_per_symbol = d_samples_per_chip * 2;
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d_secs_per_sample = 1.0 / channel_rate;
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d_check_width = 240 * d_samples_per_symbol; //only search to this far from the end of the stream buffer
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set_output_multiple(1+d_check_width);
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}
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void air_modes_preamble::set_threshold(float threshold_db)
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{
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d_threshold_db = threshold_db;
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d_threshold = powf(10., threshold_db/20.); //the level that the sample must be above the moving average in order to qualify as a pulse
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}
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float air_modes_preamble::get_threshold(void)
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{
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return d_threshold_db;
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}
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static void integrate_and_dump(float *out, const float *in, int chips, int samps_per_chip) {
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for(int i=0; i<chips; i++) {
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float acc = 0;
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@ -169,7 +184,7 @@ int air_modes_preamble::general_work(int noutput_items,
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if(!valid_preamble) continue;
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//be sure we've got enough room in the input buffer to copy out a whole packet
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if(ninputs-i < 240*d_samples_per_chip) {
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if(ninputs-i < d_check_width) {
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consume_each(std::max(i-1,0));
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if(0) std::cout << "Preamble consumed " << std::max(i-1,0) << ", returned 0 (no room)" << std::endl;
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return 0;
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@ -51,14 +51,17 @@ air_modes_slicer::air_modes_slicer(int channel_rate, gr_msg_queue_sptr queue) :
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gr_make_io_signature (1, 1, sizeof(float)), //stream 0 is received data, stream 1 is binary preamble detector output
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gr_make_io_signature (0, 0, 0) )
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{
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//initialize private data here
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set_rate(channel_rate);
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d_queue = queue;
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}
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void air_modes_slicer::set_rate(int channel_rate)
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{
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d_chip_rate = 2000000; //2Mchips per second
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d_samples_per_chip = 2;//FIXME this is constant now channel_rate / d_chip_rate;
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d_samples_per_symbol = d_samples_per_chip * 2;
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d_check_width = 120 * d_samples_per_symbol; //how far you will have to look ahead
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d_queue = queue;
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set_output_multiple(d_check_width*2); //how do you specify buffer size for sinks?
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d_check_width = 240 * d_samples_per_symbol; //how far you will have to look ahead
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set_output_multiple(d_check_width); //how do you specify buffer size for sinks?
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}
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//this slicer is courtesy of Lincoln Labs. supposedly it is more resistant to mode A/C FRUIT.
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@ -25,6 +25,7 @@
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from gnuradio import gr, gru, optfir, eng_notation, blks2
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from gnuradio.eng_option import eng_option
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from gnuradio.gr.pubsub import pubsub
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from optparse import OptionParser
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import air_modes
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import zmq
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@ -63,9 +64,10 @@ class radio_publisher(threading.Thread):
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self.finished.set()
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class modes_radio (gr.top_block):
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class modes_radio (gr.top_block, pubsub):
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def __init__(self, options, context):
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gr.top_block.__init__(self)
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pubsub.__init__(self)
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self._options = options
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self._queue = gr.msg_queue()
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@ -75,10 +77,22 @@ class modes_radio (gr.top_block):
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self._setup_source(options)
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#TODO allow setting rate, threshold (drill down into slicer & preamble)
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self.rx_path = air_modes.rx_path(rate, options.threshold, self._queue, options.pmf)
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#now subscribe to set various options via pubsub
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self.subscribe("FREQ", self.set_freq)
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self.subscribe("GAIN", self.set_gain)
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self.subscribe("RATE", self.set_rate)
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self.subscribe("RATE", self.rx_path.set_rate)
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self.subscribe("THRESHOLD", self.rx_path.set_threshold)
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self.subscribe("PMF", self.rx_path.set_pmf)
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self.publish("FREQ", self.get_freq)
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self.publish("GAIN", self.get_gain)
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self.publish("RATE", self.get_rate)
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self.publish("THRESHOLD", self.rx_path.get_threshold)
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self.publish("PMF", self.rx_path.get_pmf)
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if use_resampler:
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self.lpfiltcoeffs = gr.firdes.low_pass(1, 5*3.2e6, 1.6e6, 300e3)
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self.resample = blks2.rational_resampler_ccf(interpolation=5, decimation=4, taps=self.lpfiltcoeffs)
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@ -87,9 +101,11 @@ class modes_radio (gr.top_block):
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self.connect(self._u, self.rx_path)
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#Publish messages when they come back off the queue
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#self._sender = radio_publisher(None, context, self._queue)
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#TODO use address
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self._sender = air_modes.zmq_pubsub_iface(context, subaddr=None, pubaddr="inproc://modes-radio-pub")
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server_addr = ["inproc://modes-radio-pub"]
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if options.tcp is not None:
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server_addr += ["tcp://*:%i"] % options.tcp
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self._sender = air_modes.zmq_pubsub_iface(context, subaddr=None, pubaddr=server_addr)
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self._async_sender = gru.msgq_runner(self._queue, self.send)
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def send(self, msg):
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@ -135,6 +151,30 @@ class modes_radio (gr.top_block):
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except:
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pass
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def set_rate(self, rate):
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try:
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self._u.set_rate(rate)
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except:
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pass
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def get_freq(self, freq):
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try:
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return self._u.get_center_freq(freq, 0)
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except:
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pass
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def get_gain(self, gain):
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try:
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return self._u.get_gain()
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except:
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pass
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def get_rate(self, rate):
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try:
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return self._u.get_rate()
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except:
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pass
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def _setup_source(self, options):
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if options.filename is None and options.udp is None and options.osmocom is None:
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#UHD source by default
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@ -40,12 +40,12 @@ class rx_path(gr.hier_block2):
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# Pulse matched filter for 0.5us pulses
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if use_pmf:
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self._pmf = gr.moving_average_ff(self._spc, 1.0/self._spc, self._rate)
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self._pmf = gr.moving_average_ff(self._spc, 1.0/self._spc)#, self._rate)
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self.connect(self._demod, self._pmf)
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self._bb = self._pmf
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# Establish baseline amplitude (noise, interference)
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self._avg = gr.moving_average_ff(48*self._spc, 1.0/(48*self._spc), self._rate) # 3 preambles
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self._avg = gr.moving_average_ff(48*self._spc, 1.0/(48*self._spc))#, self._rate) # 3 preambles
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# Synchronize to Mode-S preamble
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self._sync = air_modes_swig.modes_preamble(self._rate, self._threshold)
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@ -58,3 +58,25 @@ class rx_path(gr.hier_block2):
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self.connect(self._bb, (self._sync, 0))
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self.connect(self._bb, self._avg, (self._sync, 1))
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self.connect(self._sync, self._slicer)
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def set_rate(self, rate):
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self._sync.set_rate(rate)
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self._slicer.set_rate(rate)
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self._spc = int(rate/2e6)
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self._avg.set_length_and_scale(48*self._spc, 1.0/(48*self._spc))
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if self._bb != self._demod:
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self._pmf.set_length_and_scale(self._spc, 1.0/self._spc)
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def set_threshold(self, threshold):
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self._sync.set_threshold(threshold)
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def set_pmf(self, pmf):
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#TODO must be done when top block is stopped
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pass
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def get_pmf(self, pmf):
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return not (self._bb == self._demod)
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def get_threshold(self, threshold):
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return self._sync.get_threshold()
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@ -17,12 +17,11 @@
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# the Free Software Foundation, Inc., 51 Franklin Street,
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# Boston, MA 02110-1301, USA.
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#this serves as a bridge between 0MQ subscriber and the GR pubsub callbacks interface
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#this serves as a bridge between ZMQ subscriber and the GR pubsub callbacks interface
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#creates a thread, publishes socket data to pubsub subscribers
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#just a convenient way to create an aggregating socket with callbacks on receive
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#can use this for inproc:// signalling with minimal overhead
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#not sure if it's a good idea to use this yet
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#TODO support multiple subscriber addresses for aggregation
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import time
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import threading
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@ -39,10 +38,15 @@ class zmq_pubsub_iface(threading.Thread):
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self._pubsocket = context.socket(zmq.PUB)
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self._subaddr = subaddr
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self._pubaddr = pubaddr
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if type(self._subaddr) is str:
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self._subaddr = [self._subaddr]
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if type(self._pubaddr) is str:
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self._pubaddr = [self._pubaddr]
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self._sub_connected = False
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self._pubsub = pubsub()
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if pubaddr is not None:
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self._pubsocket.bind(pubaddr)
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if self._pubaddr is not None:
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for addr in self._pubaddr:
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self._pubsocket.bind(addr)
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self._poller = zmq.Poller()
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self._poller.register(self._subsocket, zmq.POLLIN)
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@ -58,7 +62,8 @@ class zmq_pubsub_iface(threading.Thread):
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if not self._sub_connected:
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if not self._subaddr:
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raise Exception("No subscriber address set")
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self._subsocket.connect(self._subaddr)
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for addr in self._subaddr:
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self._subsocket.connect(addr)
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self._sub_connected = True
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self._subsocket.setsockopt(zmq.SUBSCRIBE, key)
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self._pubsub.subscribe(key, subscriber)
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@ -66,8 +71,6 @@ class zmq_pubsub_iface(threading.Thread):
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def unsubscribe(self, key, subscriber):
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self._subsocket.setsockopt(zmq.UNSUBSCRIBE, key)
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self._pubsub.unsubscribe(key, subscriber)
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#TODO keep track of subs (_sub_connected is value not bool)
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#so you don't recv when zero subs
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#executed from the thread context(s) of the caller(s)
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#so we use a queue to push sending into the run loop
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@ -97,7 +100,7 @@ class zmq_pubsub_iface(threading.Thread):
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#snooze
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time.sleep(0.1)
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#one more send loop to clean up on shutdown
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#one more send loop to clean up on shutdown (can probably express this better above)
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while not self._queue.empty():
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self._pubsocket.send_multipart(self._queue.get())
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@ -116,16 +119,22 @@ def pr(x):
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if __name__ == "__main__":
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#create socket pair
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context = zmq.Context(1)
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sock1 = zmq_pubsub_iface(context, subaddr="inproc://sock2-pub", pubaddr="inproc://sock1-pub")
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sock2 = zmq_pubsub_iface(context, subaddr="inproc://sock1-pub", pubaddr="inproc://sock2-pub")
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sock1 = zmq_pubsub_iface(context, subaddr="inproc://sock2-pub", pubaddr=["inproc://sock1-pub"])
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sock2 = zmq_pubsub_iface(context, subaddr="inproc://sock1-pub", pubaddr=["inproc://sock2-pub", "tcp://*:5433"])
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sock3 = zmq_pubsub_iface(context, subaddr="tcp://localhost:5433", pubaddr=None)
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sock1.subscribe("data1", pr)
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sock2.subscribe("data2", pr)
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sock3.subscribe("data3", pr)
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for i in range(10):
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sock1["data2"] = "HOWDY"
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#sock1["data2"] = "HOWDY"
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#sock2["data3"] = "DRAW"
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sock2["data1"] = "PARDNER"
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time.sleep(0.01)
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#time.sleep(0.1)
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sock1.close()
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sock2.close()
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sock3.close()
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@ -23,6 +23,9 @@ air_modes_preamble_sptr air_make_modes_preamble (int channel_rate, float thresho
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class air_modes_preamble : public gr_sync_block
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{
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set_rate(int channel_rate);
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set_threshold(float threshold_db);
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int get_threshold(void);
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private:
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air_modes_preamble (int channel_rate, float threshold_db);
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};
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@ -33,6 +36,7 @@ air_modes_slicer_sptr air_make_modes_slicer (int channel_rate, gr_msg_queue_sptr
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class air_modes_slicer : public gr_block
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{
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set_rate(int channel_rate);
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private:
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air_modes_slicer (int channel_rate, gr_msg_queue_sptr queue);
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};
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