robert@464: /*
robert@464:  ____  _____ _        _    
robert@464: | __ )| ____| |      / \   
robert@464: |  _ \|  _| | |     / _ \  
robert@464: | |_) | |___| |___ / ___ \ 
robert@464: |____/|_____|_____/_/   \_\
robert@464: 
robert@464: The platform for ultra-low latency audio and sensor processing
robert@464: 
robert@464: http://bela.io
robert@464: 
robert@464: A project of the Augmented Instruments Laboratory within the
robert@464: Centre for Digital Music at Queen Mary University of London.
robert@464: http://www.eecs.qmul.ac.uk/~andrewm
robert@464: 
robert@464: (c) 2016 Augmented Instruments Laboratory: Andrew McPherson,
robert@464:   Astrid Bin, Liam Donovan, Christian Heinrichs, Robert Jack,
robert@464:   Giulio Moro, Laurel Pardue, Victor Zappi. All rights reserved.
robert@464: 
robert@464: The Bela software is distributed under the GNU Lesser General Public License
robert@464: (LGPL 3.0), available here: https://www.gnu.org/licenses/lgpl-3.0.txt
robert@464: */
robert@464: 
robert@464: 
robert@464: #include <Bela.h>
robert@464: #include <PulseIn.h>
robert@464: #include <stdlib.h>
robert@464: #include <rtdk.h>
robert@464: #include <cmath>
robert@464: 
robert@464: PulseIn pulseIn;
robert@464: int gPulseInPin = 0;
robert@464: int gDigitalOutPin = 1;
robert@464: int gPulseLength = 1234;
robert@464: int gSamplesBetweenPulses = 10000;
robert@464: 
robert@464: bool setup(BelaContext *context, void *userData)
robert@464: {
robert@464: 	pinMode(context, 0, gDigitalOutPin, OUTPUT);
robert@464: 	pulseIn.init(context, gPulseInPin, 1); //third parameter is direction
robert@464: 	return true;
robert@464: }
robert@464: 
robert@464: void render(BelaContext *context, void *userData)
robert@464: {
robert@464: 	static bool pulseOut = 0;
robert@464: 	static int count = 0;
robert@464: 	for(unsigned int n = 0; n < context->digitalFrames; n++){
robert@464: 		// detect if a pulse just ended
robert@464: 		int duration = pulseIn.hasPulsed(context, n);
robert@464: 		if(duration > 0){
robert@464: 			rt_printf("duration = %d\n", duration);
robert@464: 		}
robert@464: 
robert@464: 		// generate a rectangular waveform as a test signal.
robert@464: 		// Connect gDigitalOutPin to gPulseInPin
robert@464: 		// to verify that the detected pulse length is gPulseLength
robert@464: 		if(count == gPulseLength ){
robert@464: 			pulseOut = false;
robert@464: 		}
robert@464: 		if(count == (gPulseLength + gSamplesBetweenPulses)){
robert@464: 			pulseOut = true;
robert@464: 			count = 0;
robert@464: 		}
robert@464: 		digitalWrite(context, n, gDigitalOutPin, pulseOut);
robert@464: 		count++;
robert@464: 	}
robert@464: }
robert@464: 
robert@464: void cleanup(BelaContext *context, void *userData)
robert@464: {
robert@464: 
robert@464: }