From: smckown <smckown@4bc1554a-c7f2-4f65-a403-e0be01f0239c>
Date: Mon, 9 Nov 2009 19:30:59 +0000 (+0000)
Subject: Teach aerovector_t that it can be null, via a special value in its dir member.
X-Git-Tag: release/2.1.0-2~5
X-Git-Url: https://oss.titaniummirror.com/gitweb/?p=tinyos-2.x.git;a=commitdiff_plain;h=e7cff086d70a6cd44c0c7ba21e83a92d52e5e0bf

Teach aerovector_t that it can be null, via a special value in its dir member.
---

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. */