comparison projects/level_meter/render.cpp @ 268:8d80eda512cd prerelease

Added new overlay for using PRU0 or PRU1, a script to halt board on button press, and several example projects

 // Decay rates for detecting levels
 float gLocalDecayRate = 0.99, gPeakDecayRate = 0.999;
 
 // Thresholds for LEDs: set in setup()
 float gThresholds[NUMBER_OF_SEGMENTS + 1];
+int gSamplesToLight[NUMBER_OF_SEGMENTS];
 
 // High-pass filter on the input
 float gLastX[2] = {0};
 float gLastY[2] = {0};
 

 	// Level = 10^(dB/20)
 	for(int i = 0; i < NUMBER_OF_SEGMENTS + 1; i++) {
 		gThresholds[i] = powf(10.0f, (-1.0 * (NUMBER_OF_SEGMENTS - i)) * .05);
 	}
 	
-	for(int i = 0; i < NUMBER_OF_SEGMENTS; i++)
+	for(int i = 0; i < NUMBER_OF_SEGMENTS; i++) {
+		gSamplesToLight[i] = 0;
 		pinModeFrame(context, 0, i, OUTPUT);
+	}
 
 	return true;
 }
 
 // render() is called regularly at the highest priority by the audio engine.

 		for(int led = 0; led < NUMBER_OF_SEGMENTS; led++) {
 			// All LEDs up to the local level light up. The LED
 			// for the peak level also remains lit.
 			int state = LOW;
 				
-			if(gAudioLocalLevel > gThresholds[led])
+			if(gAudioLocalLevel > gThresholds[led]) {
 				state = HIGH;
-			else if(gAudioPeakLevel > gThresholds[led] && gAudioPeakLevel <= gThresholds[led + 1])
+				gSamplesToLight[led] = 1000;
+			}
+			/*else if(gAudioPeakLevel > gThresholds[led] && gAudioPeakLevel <= gThresholds[led + 1]) {
+				state = HIGH;
+				gSamplesToLight[led] = 1000;
+			}*/
+			else if(--gSamplesToLight[led] > 0)
 				state = HIGH;
 			
 			// Write LED
 			digitalWriteFrameOnce(context, n, led, state);
 		}