diff options
| author | Tom Rondeau <trondeau@vt.edu> | 2012-11-06 12:26:57 -0500 |
|---|---|---|
| committer | Tom Rondeau <trondeau@vt.edu> | 2012-11-06 13:05:26 -0500 |
| commit | 0c9c16fb008b02a5af39fb22e18acfff2dbd933a (patch) | |
| tree | 2a1d555a5b496f84eaf7f360b1cc50b64ab0fd03 /gr-uhd/examples/python/usrp_wfm_rcv_sca.py | |
| parent | 463b962fe280c5515947498b4d0f4fd3b5993662 (diff) | |
all: Python, GRC, and examples to properly pull blocks from filter and analog.
Diffstat (limited to 'gr-uhd/examples/python/usrp_wfm_rcv_sca.py')
| -rwxr-xr-x | gr-uhd/examples/python/usrp_wfm_rcv_sca.py | 74 |
1 files changed, 38 insertions, 36 deletions
diff --git a/gr-uhd/examples/python/usrp_wfm_rcv_sca.py b/gr-uhd/examples/python/usrp_wfm_rcv_sca.py index 0e93e22fcd..68ff27ff30 100755 --- a/gr-uhd/examples/python/usrp_wfm_rcv_sca.py +++ b/gr-uhd/examples/python/usrp_wfm_rcv_sca.py @@ -1,6 +1,6 @@ #!/usr/bin/env python # -# Copyright 2006,2007,2011 Free Software Foundation, Inc. +# Copyright 2006,2007,2011,2012 Free Software Foundation, Inc. # # This file is part of GNU Radio # @@ -50,7 +50,9 @@ OFDM. """ -from gnuradio import gr, optfir, audio, blks2, uhd +from gnuradio import gr, audio, uhd +from gnuradio import filter +from gnuradio import analog from gnuradio.eng_option import eng_option from gnuradio.wxgui import slider, powermate from gnuradio.wxgui import stdgui2, fftsink2, form @@ -121,19 +123,19 @@ class wfm_rx_sca_block (stdgui2.std_top_block): dev_rate = self.u.get_samp_rate() nfilts = 32 - chan_coeffs = optfir.low_pass (nfilts, # gain - nfilts*usrp_rate, # sampling rate - 100e3, # passband cutoff - 140e3, # stopband cutoff - 0.1, # passband ripple - 60) # stopband attenuation + chan_coeffs = filter.optfir.low_pass(nfilts, # gain + nfilts*usrp_rate, # sampling rate + 100e3, # passband cutoff + 140e3, # stopband cutoff + 0.1, # passband ripple + 60) # stopband attenuation rrate = usrp_rate / dev_rate - self.chan_filt = blks2.pfb_arb_resampler_ccf(rrate, chan_coeffs, nfilts) - + self.chan_filt = filter.pfb.arb_resampler_ccf(rrate, chan_coeffs, nfilts) + #Create demodulator block for Main FM Channel max_dev = 75e3 fm_demod_gain = demod_rate/(2*math.pi*max_dev) - self.fm_demod = gr.quadrature_demod_cf (fm_demod_gain) + self.fm_demod = analog.quadrature_demod_cf(fm_demod_gain) # Note - deemphasis is not applied to the Main FM Channel as # main audio is not decoded @@ -143,20 +145,20 @@ class wfm_rx_sca_block (stdgui2.std_top_block): max_sca_dev = 6e3 # Create filter to get SCA channel we want - sca_chan_coeffs = gr.firdes.low_pass (1.0, # gain - demod_rate, # sampling rate - max_sca_dev, # cutoff freq - max_sca_dev/3, # trans. band - gr.firdes.WIN_HANN) # filter type + sca_chan_coeffs = filter.firdes.low_pass(1.0, # gain + demod_rate, # sampling rate + max_sca_dev, # cutoff freq + max_sca_dev/3, # trans. band + analog.firdes.WIN_HANN) # filter type - self.ddc = gr.freq_xlating_fir_filter_fcf(sca_chanfilt_decim, # decim rate - sca_chan_coeffs, # taps - 0, # freq translation amount (Gets set by the UI) - demod_rate) # input sample rate + self.ddc = filter.freq_xlating_fir_filter_fcf(sca_chanfilt_decim, # decim rate + sca_chan_coeffs, # taps + 0, # freq translation amount (Gets set by the UI) + demod_rate) # input sample rate #Create demodulator block for SCA Channel sca_demod_gain = sca_demod_rate/(2*math.pi*max_sca_dev) - self.fm_demod_sca = gr.quadrature_demod_cf (sca_demod_gain) + self.fm_demod_sca = analog.quadrature_demod_cf(sca_demod_gain) # SCA analog audio is bandwidth limited to 5 KHz @@ -166,31 +168,31 @@ class wfm_rx_sca_block (stdgui2.std_top_block): sca_tau = 150e-6 # compute FIR filter taps for SCA audio filter - audio_coeffs = gr.firdes.low_pass (1.0, # gain - sca_demod_rate, # sampling rate - max_sca_audio_freq, # cutoff freq - max_sca_audio_freq/2.5, # trans. band - gr.firdes.WIN_HAMMING) + audio_coeffs = filter.firdes.low_pass(1.0, # gain + sca_demod_rate, # sampling rate + max_sca_audio_freq, # cutoff freq + max_sca_audio_freq/2.5, # trans. band + filter.firdes.WIN_HAMMING) # input: float; output: float - self.audio_filter = gr.fir_filter_fff (audio_decim, audio_coeffs) + self.audio_filter = filter.fir_filter_fff(audio_decim, audio_coeffs) # Create deemphasis block that is applied after SCA demodulation - self.deemph = blks2.fm_deemph (audio_rate, sca_tau) + self.deemph = analog.fm_deemph(audio_rate, sca_tau) self.volume_control = gr.multiply_const_ff(self.vol) # sound card as final sink - self.audio_sink = audio.sink (int (audio_rate), - options.audio_output, - False) # ok_to_block + self.audio_sink = audio.sink(int (audio_rate), + options.audio_output, + False) # ok_to_block # now wire it all together - self.connect (self.u, self.chan_filt, self.fm_demod, - self.ddc, self.fm_demod_sca) - self.connect (self.fm_demod_sca, self.audio_filter, - self.deemph, self.volume_control, - self.audio_sink) + self.connect(self.u, self.chan_filt, self.fm_demod, + self.ddc, self.fm_demod_sca) + self.connect(self.fm_demod_sca, self.audio_filter, + self.deemph, self.volume_control, + self.audio_sink) self._build_gui(vbox, usrp_rate, demod_rate, sca_demod_rate, audio_rate) |