Mercurial > hg > beaglert
view examples/06-Sensors/basic-pulseIn/render.cpp @ 536:b97fe1dc4278 prerelease
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author | Liam Donovan <l.b.donovan@qmul.ac.uk> |
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date | Thu, 23 Jun 2016 21:24:45 +0100 |
parents | 8fcfbfb32aa0 |
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/* ____ _____ _ _ | __ )| ____| | / \ | _ \| _| | | / _ \ | |_) | |___| |___ / ___ \ |____/|_____|_____/_/ \_\ The platform for ultra-low latency audio and sensor processing http://bela.io A project of the Augmented Instruments Laboratory within the Centre for Digital Music at Queen Mary University of London. http://www.eecs.qmul.ac.uk/~andrewm (c) 2016 Augmented Instruments Laboratory: Andrew McPherson, Astrid Bin, Liam Donovan, Christian Heinrichs, Robert Jack, Giulio Moro, Laurel Pardue, Victor Zappi. All rights reserved. The Bela software is distributed under the GNU Lesser General Public License (LGPL 3.0), available here: https://www.gnu.org/licenses/lgpl-3.0.txt */ #include <Bela.h> #include <PulseIn.h> #include <stdlib.h> #include <rtdk.h> #include <cmath> PulseIn pulseIn; int gPulseInPin = 0; int gDigitalOutPin = 1; int gPulseLength = 1234; int gSamplesBetweenPulses = 10000; bool setup(BelaContext *context, void *userData) { pinMode(context, 0, gDigitalOutPin, OUTPUT); pulseIn.init(context, gPulseInPin, 1); //third parameter is direction return true; } void render(BelaContext *context, void *userData) { static bool pulseOut = 0; static int count = 0; for(unsigned int n = 0; n < context->digitalFrames; n++){ // detect if a pulse just ended int duration = pulseIn.hasPulsed(context, n); if(duration > 0){ rt_printf("duration = %d\n", duration); } // generate a rectangular waveform as a test signal. // Connect gDigitalOutPin to gPulseInPin // to verify that the detected pulse length is gPulseLength if(count == gPulseLength ){ pulseOut = false; } if(count == (gPulseLength + gSamplesBetweenPulses)){ pulseOut = true; count = 0; } digitalWrite(context, n, gDigitalOutPin, pulseOut); count++; } } void cleanup(BelaContext *context, void *userData) { }