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dac31a0347
These changes add the ability to intialize a speaker instance to use a PWM pin instead of a standard GPIO pin in order to emit sounds. The current GPIO functionality is fairly constrained by the implementation -- it only permits playing cerain hardcoded "notes". The PWM support allows one to emit specific frequencies (currently between 50-32Khz) using a PWM pin. Of course, you may still be constrained by the limits of your PWM hardware in the end. There are a few new functions provided to support this PWM mode. To use the PWM mode of speaker, use the speaker_init_pwm() initialization routine instead of speaker_init() (for C). For C++ and the SWIG languages, pass "true" as the second argument to the constructor to enable PWM mode. The default is "false", to match current default behavior (GPIO). Functions that are not related to a given mode (GPIO vs. PWM) will do nothing if not usable in that mode. Signed-off-by: Jon Trulson <jtrulson@ics.com>
45 lines
1.7 KiB
Python
Executable File
45 lines
1.7 KiB
Python
Executable File
#!/usr/bin/python
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# Author: Jon Trulson <jtrulson@ics.com>
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# Copyright (c) 2017 Intel Corporation.
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#
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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import time, sys, signal, atexit
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from upm import pyupm_speaker as upmspeaker
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def main():
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# Instantiate a Speaker (PWM) pin D3 in PWM mode
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speaker = upmspeaker.Speaker(3, True)
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# emit a series of frequencies for 500ms each
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speaker.emit(50, 500);
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speaker.emit(75, 500);
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speaker.emit(125, 500);
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speaker.emit(250, 500);
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speaker.emit(500, 500);
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speaker.emit(1000, 500);
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speaker.emit(2000, 500);
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speaker.emit(3000, 500);
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speaker.emit(5000, 500);
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speaker.emit(10000, 500);
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if __name__ == '__main__':
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main()
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