Mercurial > hg > beaglert
diff examples/06-Sensors/basic-pulseIn/render.cpp @ 464:8fcfbfb32aa0 prerelease
Examples reorder with subdirectories. Added header to each project. Moved Doxygen to bottom of render.cpp.
author | Robert Jack <robert.h.jack@gmail.com> |
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date | Mon, 20 Jun 2016 16:20:38 +0100 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/examples/06-Sensors/basic-pulseIn/render.cpp Mon Jun 20 16:20:38 2016 +0100 @@ -0,0 +1,73 @@ +/* + ____ _____ _ _ +| __ )| ____| | / \ +| _ \| _| | | / _ \ +| |_) | |___| |___ / ___ \ +|____/|_____|_____/_/ \_\ + +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) +{ + +}