comparison examples/06-Sensors/basic-pulseIn/render.cpp @ 468:85cf9c0da052 prerelease

merge

+/*
+ ____  _____ _        _    
+| __ )| ____| |      / \   
+|  _ \|  _| | |     / _ \  
+| |_) | |___| |___ / ___ \ 
+|____/|_____|_____/_/   \_\
+
+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)
+{
+
+}