l@273: // this example reads the analogue inputs 0 and 1
l@273: // and generates a sine wave with an amplitude and
l@273: // frequency determined by their values
l@273: // it then plots these on the oscilloscope
l@273: 
giuliomoro@301: #include <Bela.h>
l@273: #include <cmath>
l@273: #include <Scope.h>
l@273: 
l@273: Scope scope;
l@273: 
l@273: float gInverseSampleRate;
l@273: float gPhase;
l@273: 
giuliomoro@301: bool setup(BelaContext *context, void *userData)
l@273: {
l@273: 
l@273:     // setup the scope with 3 channels at the audio sample rate
l@273: 	scope.setup(3, context->audioSampleRate);
l@273: 	
l@273: 	gInverseSampleRate = 1.0 / context->audioSampleRate;
l@273: 	gPhase = 0.0;
l@273: 
l@273: 	return true;
l@273: }
l@273: 
giuliomoro@301: void render(BelaContext *context, void *userData)
l@273: {
l@273: 
l@273: 	for(unsigned int n = 0; n < context->audioFrames; n++) {
l@273: 	    
l@273: 	    // read analogIn channels 0 and 1
andrewm@308: 	    float in1 = analogRead(context, n, 0);
andrewm@308: 	    float in2 = analogRead(context, n, 1);
l@273: 	    
l@273: 	    // map in1 to amplitude and in2 to frequency
l@273: 	    float amplitude = in1 * 0.8f;
l@273: 	    float frequency = map(in2, 0, 1, 100, 1000);
l@273: 	    
l@273: 	    // generate a sine wave with the amplitude and frequency 
l@273: 	    float out = amplitude * sinf(gPhase);
l@273: 	    gPhase += 2.0 * M_PI * frequency * gInverseSampleRate;
l@273: 		if(gPhase > 2.0 * M_PI)
l@273: 			gPhase -= 2.0 * M_PI;
l@273: 	    
l@273: 	    // log the sine wave and sensor values on the scope
l@273: 	    scope.log(out, in1, in2);
l@273: 	    
l@273: 	    // pass the sine wave to the audio outputs
l@273: 	    for(unsigned int channel = 0; channel < context->audioChannels; channel++)
l@273: 			context->audioOut[n * context->audioChannels + channel] = out;
l@273: 
l@273: 	}
l@273: }
l@273: 
giuliomoro@301: void cleanup(BelaContext *context, void *userData)
l@273: {
l@273: 
l@273: }