Mercurial > hg > beaglert

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/projects/scope/main.cpp	Wed Jul 22 11:38:41 2015 +0100
@@ -0,0 +1,97 @@
+/*
+ * main.cpp
+ *
+ *  Created on: Oct 24, 2014
+ *      Author: parallels
+ */
+#include <unistd.h>
+#include <iostream>
+#include <cstdlib>
+#include <libgen.h>
+#include <signal.h>
+#include <getopt.h>
+#include <BeagleRT.h>
+
+using namespace std;
+
+// Handle Ctrl-C by requesting that the audio rendering stop
+void interrupt_handler(int var)
+{
+	gShouldStop = true;
+}
+
+// Print usage information
+void usage(const char * processName)
+{
+	cerr << "Usage: " << processName << " [options]" << endl;
+
+	BeagleRT_usage();
+
+	cerr << "   --frequency [-f] frequency: Set the frequency of the oscillator\n";
+	cerr << "   --help [-h]:                Print this menu\n";
+}
+
+int main(int argc, char *argv[])
+{
+	BeagleRTInitSettings settings;	// Standard audio settings
+	float frequency = 440.0;	// Frequency of oscillator
+
+	struct option customOptions[] =
+	{
+		{"help", 0, NULL, 'h'},
+		{"frequency", 1, NULL, 'f'},
+		{NULL, 0, NULL, 0}
+	};
+
+	// Set default settings
+	BeagleRT_defaultSettings(&settings);
+
+	// Parse command-line arguments
+	while (1) {
+		int c;
+		if ((c = BeagleRT_getopt_long(argc, argv, "hf:", customOptions, &settings)) < 0)
+				break;
+		switch (c) {
+		case 'h':
+				usage(basename(argv[0]));
+				exit(0);
+		case 'f':
+				frequency = atof(optarg);
+				break;
+		case '?':
+		default:
+				usage(basename(argv[0]));
+				exit(1);
+		}
+	}
+
+	// Initialise the PRU audio device
+	if(BeagleRT_initAudio(&settings, &frequency) != 0) {
+		cout << "Error: unable to initialise audio" << endl;
+		return -1;
+	}
+
+	// Start the audio device running
+	if(BeagleRT_startAudio()) {
+		cout << "Error: unable to start real-time audio" << endl;
+		return -1;
+	}
+
+	// Set up interrupt handler to catch Control-C and SIGTERM
+	signal(SIGINT, interrupt_handler);
+	signal(SIGTERM, interrupt_handler);
+
+	// Run until told to stop
+	while(!gShouldStop) {
+		usleep(100000);
+	}
+
+	// Stop the audio device
+	BeagleRT_stopAudio();
+
+	// Clean up any resources allocated for audio
+	BeagleRT_cleanupAudio();
+
+	// All done!
+	return 0;
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/projects/scope/render.cpp	Wed Jul 22 11:38:41 2015 +0100
@@ -0,0 +1,75 @@
+#include <BeagleRT.h>
+#include <Scope.h>
+#include <cmath>
+
+float gPhase1, gPhase2;
+float gFrequency1, gFrequency2;
+float gInverseSampleRate;
+
+Scope scope;    //create a scope object
+
+// initialise_render() 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)
+{
+	scope.setup(context->audioSampleRate);  //call this once in setup to initialise the scope
+
+	gInverseSampleRate = 1.0/context->audioSampleRate;
+
+	gPhase1 = 0.0;
+	gPhase2 = 0.0;
+
+	gFrequency1 = 200.0;
+	gFrequency2 = 201.0;
+	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 chn1 = sinf(gPhase1);
+	    float chn2 = sinf(gPhase2);
+
+	    float chn3 = context->audioIn[n*2 + 0];
+	    float chn4 = context->audioIn[n*2 + 1];
+
+	    float chn5 = context->analogIn[(int)n/2*8 + 0];
+	    float chn6 = context->analogIn[(int)n/2*8 + 1];
+
+//	    scope.log(chn1, chn2, chn3, chn4, chn5, chn6);
+	    scope.log(chn1);
+	    //call this once every audio frame
+	    //takes six or fewer floats as parameters
+	    //first parameter becomes channel 1 etc
+	    //to view, click the 'oscilloscope' button on the toolbar while BeagleRT is NOT running
+	    //then click the big red button on the toolbar on this page
+
+	    gPhase1 += 2.0 * M_PI * gFrequency1 * gInverseSampleRate;
+	    gPhase2 += 2.0 * M_PI * gFrequency2 * gInverseSampleRate;
+		if(gPhase1 > 2.0 * M_PI)
+			gPhase1 -= 2.0 * M_PI;
+		if(gPhase2 > 2.0 * M_PI)
+			gPhase2 -= 2.0 * M_PI;
+
+	}
+}
+
+// cleanup_render() is called once at the end, after the audio has stopped.
+// Release any resources that were allocated in initialise_render().
+
+void cleanup(BeagleRTContext *context, void *userData)
+{
+
+}
--- /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)
+{
+}