#!/usr/bin/env python # # Copyright 2003,2004,2005 Free Software Foundation, Inc. # # This file is part of GNU Radio # # GNU Radio is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2, or (at your option) # any later version. # # GNU Radio is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with GNU Radio; see the file COPYING. If not, write to # the Free Software Foundation, Inc., 51 Franklin Street, # Boston, MA 02110-1301, USA. # from gnuradio import gr, gru, window from gnuradio.wxgui import stdgui import wx import gnuradio.wxgui.plot as plot import Numeric import os import threading import math default_fftsink_size = (640,240) default_fft_rate = gr.prefs().get_long('wxgui', 'fft_rate', 15) class waterfall_sink_base(object): def __init__(self, input_is_real=False, baseband_freq=0, sample_rate=1, fft_size=512, fft_rate=default_fft_rate, average=False, avg_alpha=None, title=''): # initialize common attributes self.baseband_freq = baseband_freq self.sample_rate = sample_rate self.fft_size = fft_size self.fft_rate = fft_rate self.average = average if avg_alpha is None: self.avg_alpha = 2.0 / fft_rate else: self.avg_alpha = avg_alpha self.title = title self.input_is_real = input_is_real self.msgq = gr.msg_queue(2) # queue up to 2 messages def set_average(self, average): self.average = average if average: self.avg.set_taps(self.avg_alpha) else: self.avg.set_taps(1.0) def set_avg_alpha(self, avg_alpha): self.avg_alpha = avg_alpha def set_baseband_freq(self, baseband_freq): self.baseband_freq = baseband_freq def set_sample_rate(self, sample_rate): self.sample_rate = sample_rate self._set_n() def _set_n(self): self.one_in_n.set_n(max(1, int(self.sample_rate/self.fft_size/self.fft_rate))) class waterfall_sink_f(gr.hier_block, waterfall_sink_base): def __init__(self, fg, parent, baseband_freq=0, y_per_div=10, ref_level=50, sample_rate=1, fft_size=512, fft_rate=default_fft_rate, average=False, avg_alpha=None, title='', size=default_fftsink_size): waterfall_sink_base.__init__(self, input_is_real=True, baseband_freq=baseband_freq, sample_rate=sample_rate, fft_size=fft_size, fft_rate=fft_rate, average=average, avg_alpha=avg_alpha, title=title) s2p = gr.serial_to_parallel(gr.sizeof_float, self.fft_size) self.one_in_n = gr.keep_one_in_n(gr.sizeof_float * self.fft_size, max(1, int(self.sample_rate/self.fft_size/self.fft_rate))) mywindow = window.blackmanharris(self.fft_size) fft = gr.fft_vfc(self.fft_size, True, mywindow) c2mag = gr.complex_to_mag(self.fft_size) self.avg = gr.single_pole_iir_filter_ff(1.0, self.fft_size) log = gr.nlog10_ff(20, self.fft_size, -20*math.log10(self.fft_size)) sink = gr.message_sink(gr.sizeof_float * self.fft_size, self.msgq, True) fg.connect (s2p, self.one_in_n, fft, c2mag, self.avg, log, sink) gr.hier_block.__init__(self, fg, s2p, sink) self.win = waterfall_window(self, parent, size=size) self.set_average(self.average) class waterfall_sink_c(gr.hier_block, waterfall_sink_base): def __init__(self, fg, parent, baseband_freq=0, y_per_div=10, ref_level=50, sample_rate=1, fft_size=512, fft_rate=default_fft_rate, average=False, avg_alpha=None, title='', size=default_fftsink_size): waterfall_sink_base.__init__(self, input_is_real=False, baseband_freq=baseband_freq, sample_rate=sample_rate, fft_size=fft_size, fft_rate=fft_rate, average=average, avg_alpha=avg_alpha, title=title) s2p = gr.serial_to_parallel(gr.sizeof_gr_complex, self.fft_size) self.one_in_n = gr.keep_one_in_n(gr.sizeof_gr_complex * self.fft_size, max(1, int(self.sample_rate/self.fft_size/self.fft_rate))) mywindow = window.blackmanharris(self.fft_size) fft = gr.fft_vcc(self.fft_size, True, mywindow) c2mag = gr.complex_to_mag(self.fft_size) self.avg = gr.single_pole_iir_filter_ff(1.0, self.fft_size) log = gr.nlog10_ff(20, self.fft_size, -20*math.log10(self.fft_size)) sink = gr.message_sink(gr.sizeof_float * self.fft_size, self.msgq, True) fg.connect(s2p, self.one_in_n, fft, c2mag, self.avg, log, sink) gr.hier_block.__init__(self, fg, s2p, sink) self.win = waterfall_window(self, parent, size=size) self.set_average(self.average) # ------------------------------------------------------------------------ myDATA_EVENT = wx.NewEventType() EVT_DATA_EVENT = wx.PyEventBinder (myDATA_EVENT, 0) class DataEvent(wx.PyEvent): def __init__(self, data): wx.PyEvent.__init__(self) self.SetEventType (myDATA_EVENT) self.data = data def Clone (self): self.__class__ (self.GetId()) class input_watcher (threading.Thread): def __init__ (self, msgq, fft_size, event_receiver, **kwds): threading.Thread.__init__ (self, **kwds) self.setDaemon (1) self.msgq = msgq self.fft_size = fft_size self.event_receiver = event_receiver self.keep_running = True self.start () def run (self): while (self.keep_running): msg = self.msgq.delete_head() # blocking read of message queue itemsize = int(msg.arg1()) nitems = int(msg.arg2()) s = msg.to_string() # get the body of the msg as a string # There may be more than one FFT frame in the message. # If so, we take only the last one if nitems > 1: start = itemsize * (nitems - 1) s = s[start:start+itemsize] complex_data = Numeric.fromstring (s, Numeric.Float32) de = DataEvent (complex_data) wx.PostEvent (self.event_receiver, de) del de class waterfall_window (wx.Panel): def __init__ (self, fftsink, parent, id = -1, pos = wx.DefaultPosition, size = wx.DefaultSize, style = wx.DEFAULT_FRAME_STYLE, name = ""): wx.Panel.__init__(self, parent, id, pos, size, style, name) self.fftsink = fftsink self.bm = wx.EmptyBitmap(self.fftsink.fft_size, 300, -1) self.scale_factor = 5.0 # FIXME should autoscale, or set this dc1 = wx.MemoryDC() dc1.SelectObject(self.bm) dc1.Clear() self.pens = self.make_pens() wx.EVT_PAINT( self, self.OnPaint ) wx.EVT_CLOSE (self, self.on_close_window) EVT_DATA_EVENT (self, self.set_data) self.build_popup_menu() wx.EVT_CLOSE (self, self.on_close_window) self.Bind(wx.EVT_RIGHT_UP, self.on_right_click) self.input_watcher = input_watcher(fftsink.msgq, fftsink.fft_size, self) def on_close_window (self, event): print "waterfall_window: on_close_window" self.keep_running = False def const_list(self,const,len): return [const] * len def make_colormap(self): r = [] r.extend(self.const_list(0,96)) r.extend(range(0,255,4)) r.extend(self.const_list(255,64)) r.extend(range(255,128,-4)) g = [] g.extend(self.const_list(0,32)) g.extend(range(0,255,4)) g.extend(self.const_list(255,64)) g.extend(range(255,0,-4)) g.extend(self.const_list(0,32)) b = range(128,255,4) b.extend(self.const_list(255,64)) b.extend(range(255,0,-4)) b.extend(self.const_list(0,96)) return (r,g,b) def make_pens(self): (r,g,b) = self.make_colormap() pens = [] for i in range(0,256): colour = wx.Colour(r[i], g[i], b[i]) pens.append( wx.Pen(colour, 2, wx.SOLID)) return pens def OnPaint(self, event): dc = wx.PaintDC(self) self.DoDrawing(dc) def DoDrawing(self, dc=None): if dc is None: dc = wx.ClientDC(self) dc.DrawBitmap(self.bm, 0, 0, False ) def const_list(self,const,len): a = [const] for i in range(1,len): a.append(const) return a def make_colormap(self): r = [] r.extend(self.const_list(0,96)) r.extend(range(0,255,4)) r.extend(self.const_list(255,64)) r.extend(range(255,128,-4)) g = [] g.extend(self.const_list(0,32)) g.extend(range(0,255,4)) g.extend(self.const_list(255,64)) g.extend(range(255,0,-4)) g.extend(self.const_list(0,32)) b = range(128,255,4) b.extend(self.const_list(255,64)) b.extend(range(255,0,-4)) b.extend(self.const_list(0,96)) return (r,g,b) def set_data (self, evt): dB = evt.data L = len (dB) dc1 = wx.MemoryDC() dc1.SelectObject(self.bm) dc1.Blit(0,1,self.fftsink.fft_size,300,dc1,0,0,wx.COPY,False,-1,-1) x = max(abs(self.fftsink.sample_rate), abs(self.fftsink.baseband_freq)) if x >= 1e9: sf = 1e-9 units = "GHz" elif x >= 1e6: sf = 1e-6 units = "MHz" else: sf = 1e-3 units = "kHz" if self.fftsink.input_is_real: # only plot 1/2 the points d_max = L/2 p_width = 2 else: d_max = L/2 p_width = 1 scale_factor = self.scale_factor if self.fftsink.input_is_real: # real fft for x_pos in range(0, d_max): value = int(dB[x_pos] * scale_factor) value = min(255, max(0, value)) dc1.SetPen(self.pens[value]) dc1.DrawRectangle(x_pos*p_width, 0, p_width, 1) else: # complex fft for x_pos in range(0, d_max): # positive freqs value = int(dB[x_pos] * scale_factor) value = min(255, max(0, value)) dc1.SetPen(self.pens[value]) dc1.DrawRectangle(x_pos*p_width + d_max, 0, p_width, 1) for x_pos in range(0 , d_max): # negative freqs value = int(dB[x_pos+d_max] * scale_factor) value = min(255, max(0, value)) dc1.SetPen(self.pens[value]) dc1.DrawRectangle(x_pos*p_width, 0, p_width, 1) self.DoDrawing (None) def on_average(self, evt): # print "on_average" self.fftsink.set_average(evt.IsChecked()) def on_right_click(self, event): menu = self.popup_menu for id, pred in self.checkmarks.items(): item = menu.FindItemById(id) item.Check(pred()) self.PopupMenu(menu, event.GetPosition()) def build_popup_menu(self): self.id_incr_ref_level = wx.NewId() self.id_decr_ref_level = wx.NewId() self.id_incr_y_per_div = wx.NewId() self.id_decr_y_per_div = wx.NewId() self.id_y_per_div_1 = wx.NewId() self.id_y_per_div_2 = wx.NewId() self.id_y_per_div_5 = wx.NewId() self.id_y_per_div_10 = wx.NewId() self.id_y_per_div_20 = wx.NewId() self.id_average = wx.NewId() self.Bind(wx.EVT_MENU, self.on_average, id=self.id_average) #self.Bind(wx.EVT_MENU, self.on_incr_ref_level, id=self.id_incr_ref_level) #self.Bind(wx.EVT_MENU, self.on_decr_ref_level, id=self.id_decr_ref_level) #self.Bind(wx.EVT_MENU, self.on_incr_y_per_div, id=self.id_incr_y_per_div) #self.Bind(wx.EVT_MENU, self.on_decr_y_per_div, id=self.id_decr_y_per_div) #self.Bind(wx.EVT_MENU, self.on_y_per_div, id=self.id_y_per_div_1) #self.Bind(wx.EVT_MENU, self.on_y_per_div, id=self.id_y_per_div_2) #self.Bind(wx.EVT_MENU, self.on_y_per_div, id=self.id_y_per_div_5) #self.Bind(wx.EVT_MENU, self.on_y_per_div, id=self.id_y_per_div_10) #self.Bind(wx.EVT_MENU, self.on_y_per_div, id=self.id_y_per_div_20) # make a menu menu = wx.Menu() self.popup_menu = menu menu.AppendCheckItem(self.id_average, "Average") # menu.Append(self.id_incr_ref_level, "Incr Ref Level") # menu.Append(self.id_decr_ref_level, "Decr Ref Level") # menu.Append(self.id_incr_y_per_div, "Incr dB/div") # menu.Append(self.id_decr_y_per_div, "Decr dB/div") # menu.AppendSeparator() # we'd use RadioItems for these, but they're not supported on Mac #menu.AppendCheckItem(self.id_y_per_div_1, "1 dB/div") #menu.AppendCheckItem(self.id_y_per_div_2, "2 dB/div") #menu.AppendCheckItem(self.id_y_per_div_5, "5 dB/div") #menu.AppendCheckItem(self.id_y_per_div_10, "10 dB/div") #menu.AppendCheckItem(self.id_y_per_div_20, "20 dB/div") self.checkmarks = { self.id_average : lambda : self.fftsink.average #self.id_y_per_div_1 : lambda : self.fftsink.y_per_div == 1, #self.id_y_per_div_2 : lambda : self.fftsink.y_per_div == 2, #self.id_y_per_div_5 : lambda : self.fftsink.y_per_div == 5, #self.id_y_per_div_10 : lambda : self.fftsink.y_per_div == 10, #self.id_y_per_div_20 : lambda : self.fftsink.y_per_div == 20, } def next_up(v, seq): """ Return the first item in seq that is > v. """ for s in seq: if s > v: return s return v def next_down(v, seq): """ Return the last item in seq that is < v. """ rseq = list(seq[:]) rseq.reverse() for s in rseq: if s < v: return s return v # ---------------------------------------------------------------- # Deprecated interfaces # ---------------------------------------------------------------- # returns (block, win). # block requires a single input stream of float # win is a subclass of wxWindow def make_waterfall_sink_f(fg, parent, title, fft_size, input_rate): block = waterfall_sink_f(fg, parent, title=title, fft_size=fft_size, sample_rate=input_rate) return (block, block.win) # returns (block, win). # block requires a single input stream of gr_complex # win is a subclass of wxWindow def make_waterfall_sink_c(fg, parent, title, fft_size, input_rate): block = waterfall_sink_c(fg, parent, title=title, fft_size=fft_size, sample_rate=input_rate) return (block, block.win) # ---------------------------------------------------------------- # Standalone test app # ---------------------------------------------------------------- class test_app_flow_graph (stdgui.gui_flow_graph): def __init__(self, frame, panel, vbox, argv): stdgui.gui_flow_graph.__init__ (self, frame, panel, vbox, argv) fft_size = 512 # build our flow graph input_rate = 20.000e3 # Generate a complex sinusoid src1 = gr.sig_source_c (input_rate, gr.GR_SIN_WAVE, 5.75e3, 1000) #src1 = gr.sig_source_c (input_rate, gr.GR_CONST_WAVE, 5.75e3, 1000) # We add these throttle blocks so that this demo doesn't # suck down all the CPU available. Normally you wouldn't use these. thr1 = gr.throttle(gr.sizeof_gr_complex, input_rate) sink1 = waterfall_sink_c (self, panel, title="Complex Data", fft_size=fft_size, sample_rate=input_rate, baseband_freq=100e3) vbox.Add (sink1.win, 1, wx.EXPAND) self.connect (src1, thr1, sink1) # generate a real sinusoid src2 = gr.sig_source_f (input_rate, gr.GR_SIN_WAVE, 5.75e3, 1000) #src2 = gr.sig_source_f (input_rate, gr.GR_CONST_WAVE, 5.75e3, 1000) thr2 = gr.throttle(gr.sizeof_float, input_rate) sink2 = waterfall_sink_f (self, panel, title="Real Data", fft_size=fft_size, sample_rate=input_rate, baseband_freq=100e3) vbox.Add (sink2.win, 1, wx.EXPAND) self.connect (src2, thr2, sink2) def main (): app = stdgui.stdapp (test_app_flow_graph, "Waterfall Sink Test App") app.MainLoop () if __name__ == '__main__': main ()