X-Git-Url: https://oss.titaniummirror.com/gitweb/?a=blobdiff_plain;f=tos%2Fchips%2Ftda5250%2Ftda5250_message.h;h=b6053fde2ae954621a90b641d73a337c861a5b8b;hb=9092b3c0aa9215dff07b3465a88eb706e3e2193f;hp=1f377841096bcfc190709115a0159c1bb8ecf8e3;hpb=96f3ce6107cdafa0e5ac33072872ea65d8da5ecb;p=tinyos-2.x.git

diff --git a/tos/chips/tda5250/tda5250_message.h b/tos/chips/tda5250/tda5250_message.h
index 1f377841..b6053fde 100644
--- a/tos/chips/tda5250/tda5250_message.h
+++ b/tos/chips/tda5250/tda5250_message.h
@@ -4,12 +4,19 @@
 #include "AM.h"
 #include "PacketAck.h"
 
+/*
+ * highest bit of token set: this message is ACK and not intended for the
+ * upper layers. Token is used for alternating bit like duplicate detection,
+ * and set by the sender in [0,127] intervall. The receiver reflects the
+ * token in the Ack, with the highest bit set. 
+ */
+
 typedef nx_struct tda5250_header_t {
-  nx_uint8_t   length;
-  nx_am_addr_t src;
-  nx_am_addr_t dest;
-  nx_am_id_t   type;
-  nx_uint8_t   token;
+  nx_uint8_t    length;
+  nx_am_addr_t  src;
+  nx_am_addr_t  dest;
+  nx_am_id_t    type;
+  nx_uint8_t    token;
 } tda5250_header_t;
 
 typedef nx_struct tda5250_footer_t {
@@ -21,6 +28,8 @@ typedef nx_struct tda5250_metadata_t {
   nx_uint8_t ack;
   /* local time when message was generated */
   nx_uint32_t time;
+  /* time of sfd generation */
+  nx_uint32_t sfdtime;
   nx_uint8_t sendSecurityMode;
   nx_uint8_t receiveSecurityMode;
   /* some meta information that allows to compute a density */