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lib/pixy/examples/hello_world/hello_world.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 a good place to start if you're just getting started with 
+// Pixy and Arduino.  This program simply prints the detected object blocks 
+// (including color codes) through the serial console.  It uses the Arduino's 
+// ICSP port.  For more information go here:
+//
+// http://cmucam.org/projects/cmucam5/wiki/Hooking_up_Pixy_to_a_Microcontroller_(like_an_Arduino)
+//
+// It prints the detected blocks once per second because printing all of the 
+// blocks for all 50 frames per second would overwhelm the Arduino's serial port.
+//
+   
+#include <SPI.h>  
+#include <Pixy.h>
+
+// This is the main Pixy object 
+Pixy pixy;
+
+void setup()
+{
+  Serial.begin(9600);
+  Serial.print("Starting...\n");
+
+  pixy.init();
+}
+
+void loop()
+{ 
+  static int i = 0;
+  int j;
+  uint16_t blocks;
+  char buf[32]; 
+  
+  // grab blocks!
+  blocks = pixy.getBlocks();
+  
+  // If there are detect blocks, print them!
+  if (blocks)
+  {
+    i++;
+    
+    // do this (print) every 50 frames because printing every
+    // frame would bog down the Arduino
+    if (i%50==0)
+    {
+      sprintf(buf, "Detected %d:\n", blocks);
+      Serial.print(buf);
+      for (j=0; j<blocks; j++)
+      {
+        sprintf(buf, "  block %d: ", j);
+        Serial.print(buf); 
+        pixy.blocks[j].print();
+      }
+    }
+  }  
+}
+