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lib/pixy/examples/led_cycle/led_cycle.ino

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+//
+// begin license header
+//
+// This file is part of Pixy CMUcam5 or "Pixy" for short
+//
+// All Pixy source code is provided under the terms of the
+// GNU General Public License v2 (http://www.gnu.org/licenses/gpl-2.0.html).
+// Those wishing to use Pixy source code, software and/or
+// technologies under different licensing terms should contact us at
+// cmucam@cs.cmu.edu. Such licensing terms are available for
+// all portions of the Pixy codebase presented here.
+//
+// end license header
+//
+// This sketch is demonstrates the setLED() function.  Running this sketch
+// will cycle the Pixy's RGB LED through its colors.   
+//
+
+#include <SPI.h>  
+#include <Pixy.h>
+
+Pixy pixy;
+
+void setup()
+{
+  Serial.begin(9600);
+  Serial.print("Starting...\n");
+
+  pixy.init();
+}
+
+void loop() 
+{ 
+   uint32_t i=0;
+   uint8_t r, g, b;
+   
+   while(1)
+   {
+     // calculate r, g, b such that it cycles through the colors
+     r = i&0xff;
+     g = (i*3)&0xff;
+     b = (i/3)&0xff;
+     pixy.setLED(r, g, b);
+     // We need to delay here because serial requests are handled 
+     // every frame period (20ms). If we don't delay, we'll
+     // overrun Pixy's receive queue. But that's all OK because 
+     // we normally only update the LED once per frame anyway.
+     delay(20);
+     
+     i++;
+   }
+}
+
+