kopia lustrzana https://github.com/F5OEO/PiFmRds
Pulse and generator
rodzic
93aed2e712
commit
f4ffbf6c7c
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@ -0,0 +1,36 @@
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#!/usr/bin/python
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# PiFmRds - FM/RDS transmitter for the Raspberry Pi
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# Copyright (C) 2014 Christophe Jacquet, F8FTK
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#
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# See https://github.com/ChristopheJacquet/PiFmRds
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# This program generates a WAV file with a 1-second sine wave at 440 Hz,
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# followed by a 1-second silence.
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import scipy.io.wavfile as wavfile
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import numpy
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sample_rate = 228000
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samples = numpy.zeros(2 * sample_rate, dtype=numpy.dtype('>i2'))
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# 1-second tune
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samples[:sample_rate] = (numpy.sin(2*numpy.pi*440*numpy.arange(sample_rate)/sample_rate)
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* 20000).astype(numpy.dtype('>i2'))
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wavfile.write("pulses.wav", sample_rate, samples)
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@ -1,6 +1,27 @@
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#!/usr/bin/python
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# This program uses Pydemod, see https://github.com/ChristopheJacquet/Pydemod
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# PiFmRds - FM/RDS transmitter for the Raspberry Pi
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# Copyright (C) 2014 Christophe Jacquet, F8FTK
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#
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# See https://github.com/ChristopheJacquet/PiFmRds
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# This program generates the waveform of a single biphase symbol
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#
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# This program uses Pydemod, see https://github.com/ChristopheJacquet/Pydemod
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import pydemod.app.rds as rds
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import numpy
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@ -24,7 +45,7 @@ header = u"""
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outc.write(header)
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outh.write(header)
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def generate_bit_in_context(pattern, name):
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def generate_bit(name):
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offset = 240
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l = 96
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count = 2
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@ -39,8 +60,6 @@ def generate_bit_in_context(pattern, name):
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shapedSamples = numpy.convolve(sample, sf)
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# shapedSamples = rds.unmodulated_signal(pattern, sample_rate)
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out = shapedSamples[528-288:528+288] #[offset:offset+l*count]
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plt.plot(sf)
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plt.plot(out)
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@ -58,8 +77,7 @@ def generate_bit_in_context(pattern, name):
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outh.write(u"extern float waveform_{name}[{size}];\n".format(name=name, size=len(out)))
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generate_bit_in_context([1], "biphase")
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#generate_bit_in_context([0, 1, 0], "different")
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generate_bit("biphase")
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outc.close()
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outh.close()
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Plik binarny nie jest wyświetlany.
21
src/rds.h
21
src/rds.h
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@ -1,3 +1,24 @@
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/*
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PiFmRds - FM/RDS transmitter for the Raspberry Pi
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Copyright (C) 2014 Christophe Jacquet, F8FTK
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See https://github.com/ChristopheJacquet/PiFmRds
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdint.h>
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extern void get_rds_samples(float *buffer, int count);
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