X-Git-Url: https://oss.titaniummirror.com/gitweb/?a=blobdiff_plain;f=tos%2Fplatforms%2Ftmirws%2Fsensors%2FAeroVane.h;h=9c02b5c32d6940129908d19ef357b2237d4e3457;hb=e7cff086d70a6cd44c0c7ba21e83a92d52e5e0bf;hp=3e90ef396845b37493abb610f59113cbde2c0417;hpb=31c5577e7d049bcb6dfc5e3d0a2c8bfd324ef25c;p=tinyos-2.x.git

diff --git a/tos/platforms/tmirws/sensors/AeroVane.h b/tos/platforms/tmirws/sensors/AeroVane.h
index 3e90ef39..9c02b5c3 100644
--- a/tos/platforms/tmirws/sensors/AeroVane.h
+++ b/tos/platforms/tmirws/sensors/AeroVane.h
@@ -36,6 +36,10 @@
 #ifndef AEROVANE_H
 #define AEROVANE_H
 
+enum {
+  AEROVANE_VECTOR_NULL = 65535U, /* Null vector has this value as dir */
+};
+
 typedef struct {
   uint16_t dir;		/* Vane position. 0...1023; 360 degrees = 1024 */
   uint16_t speed;	/* Anemometer revolutions over reading period. */