diff projects/scope/undefined @ 94:2fe6690fcab7

Added scope project, copied and edited from nodejsbeaglert

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/projects/scope/undefined	Wed Jul 22 11:38:41 2015 +0100
@@ -0,0 +1,84 @@
+/*
+ * render.cpp
+ *
+ *  Created on: Oct 24, 2014
+ *      Author: parallels
+ */
+
+#include <BeagleRT.h>
+#include <cmath>
+#include <client.h>
+
+float gFrequency;
+float gPhase;
+float gInverseSampleRate;
+int gCount=0;
+networkData networkObject;
+AuxiliaryTask transmitReceiveDataTask;
+
+void transmitReceiveData(){
+   	printf("transmitReceiveData auxiliary task has started\n");
+	while(!gShouldStop){
+		sendMessage(networkObject);
+		receiveMessage(networkObject);
+		usleep(1000);
+	}
+	closeSockets();
+}
+
+// setup() is called once before the audio rendering starts.
+// Use it to perform any initialisation and allocation which is dependent
+// on the period size or sample rate.
+//
+// userData holds an opaque pointer to a data structure that was passed
+// in from the call to initAudio().
+//
+// Return true on success; returning false halts the program.
+bool setup(BeagleRTContext *context, void *userData)
+{
+	// Retrieve a parameter passed in from the initAudio() call
+	gFrequency = *(float *)userData;
+
+	gInverseSampleRate = 1.0 / context->audioSampleRate;
+	gPhase = 0.0;
+
+	networkObject.counter=&gCount;
+	networkObject.variables[0]=&gFrequency;
+	networkObject.variables[1]=&gPhase;
+	networkObject.numVariables=2;
+
+	setupSockets(settings->receivePort, settings->transmitPort, settings->serverName);
+	transmitReceiveDataTask= BeagleRT_createAuxiliaryTask(*transmitReceiveData, 80, "transmit-receive-data");
+	//scheduleAuxiliaryTask(transmitReceiveDataTask); //here it does not work
+	return true;
+}
+
+// render() is called regularly at the highest priority by the audio engine.
+// Input and output are given from the audio hardware and the other
+// ADCs and DACs (if available). If only audio is available, numMatrixFrames
+// will be 0.
+
+void render(BeagleRTContext *context, void *userData)
+{
+	for(unsigned int n = 0; n < context->audioFrames; n++) {
+		float out = 0.7f * sinf(gPhase);
+		gPhase += 2.0 * M_PI * gFrequency * gInverseSampleRate;
+		if(gPhase > 2.0 * M_PI)
+			gPhase -= 2.0 * M_PI;
+
+		for(unsigned int channel = 0; channel < context->audioChannels; channel++)
+			context->audioOut[n * context->audioChannels + channel] = out;
+
+		if(gCount == 0){
+			BeagleRT_scheduleAuxiliaryTask(transmitReceiveDataTask);
+		}
+		gCount++;
+	}
+}
+
+// cleanup() is called once at the end, after the audio has stopped.
+// Release any resources that were allocated in setup().
+
+void cleanup(BeagleRTContext *context, void *userData)
+{
+}