an SPI interface the cmu pixy camera

Dependents:   robotic_fish_ver_4_9_pixy UMO

Revision:
6:4bf8d39fc5ce
Parent:
5:f54759b26096
Child:
7:e57b18779bf1
--- a/pixy.cpp	Thu Jun 05 00:12:48 2014 +0000
+++ b/pixy.cpp	Thu Jun 05 17:31:43 2014 +0000
@@ -69,8 +69,11 @@
             out->signature=INVALID_BLOCK; //used for invalid signatures
         }
         //printf("found block\n");
-        bestX=blocks[0].x;
-        bestY=blocks[0].y;
+        if (blocks[0].signature!=INVALID_BLOCK)
+        {
+            bestX=blocks[0].x;
+            bestY=blocks[0].y;
+        }
     }
     return;
 }