X-Git-Url: https://oss.titaniummirror.com/gitweb/?p=tinyos-2.x.git;a=blobdiff_plain;f=tos%2Fplatforms%2Ftelosb%2Fmac%2Ftkn154%2FTKN154_platform.h;h=fe5ae790bd1ed7e0988d49cbd049328632f44a87;hp=e129e2550377a11738d0a59d6237dd6c3c59aff0;hb=e9bfab607e051bae6afb47b44892ce37541d1b44;hpb=adf1de6c009d13b7b52e68535c63b28f59c97400

diff --git a/tos/platforms/telosb/mac/tkn154/TKN154_platform.h b/tos/platforms/telosb/mac/tkn154/TKN154_platform.h
index e129e255..fe5ae790 100644
--- a/tos/platforms/telosb/mac/tkn154/TKN154_platform.h
+++ b/tos/platforms/telosb/mac/tkn154/TKN154_platform.h
@@ -38,36 +38,26 @@
 
 /**************************************************** 
  * The following constants define guard times on Tmote Sky / TelosB. 
- * All values are in symbol time (1 symbol = 16 us)
+ * All values are in symbol time (1 symbol = 16 us) and assume the 
+ * default system configuration (MCLK running at 4 MHz)
  */
 
 enum {
-  // guard time to give up the token before actual end of CAP/CFP
-  IEEE154_RADIO_GUARD_TIME = 1000,
+  // the expected maximum time between calling a transmit() operation and
+  // the radio putting the first byte on the channel assuming no CSMA-CA
+  IEEE154_RADIO_TX_DELAY = 400,
 
-  // the expected time for a RadioTx.prepare() operation to execute (return)
-  IEEE154_RADIO_TX_PREPARE_DELAY = 220,
+  // the expected maximum time between calling a receive() operation and the 
+  // the radio actually being put in receive mode
+  IEEE154_RADIO_RX_DELAY = 400,
 
-  // the *guaranteed maximum* time between calling a RadioTx.transmit() and the
-  // first PPDU bit being put onto the channel, assuming that RadioTx.transmit() 
-  // is called inside an atomic block
-  IEEE154_RADIO_TX_SEND_DELAY = 100,
-
-  // the expected time for a RadioRx.prepare() operation to execute (return)
-  IEEE154_RADIO_RX_PREPARE_DELAY = 300,
-
-  // the *guaranteed maximum* time between calling a RadioTx.transmit() and the
-  // first PPDU bit being put onto the channel, assuming that RadioTx.transmit() 
-  // is called inside an atomic block
-  IEEE154_RADIO_RX_DELAY = 100,
-
-  // defines at what time the MAC payload for a beacon frame is assembled prior
-  // to the next scheduled beacon transmission time; must be smaller than both
-  // the beacon interval and IEEE154_RADIO_TX_PREPARE_DELAY
+  // defines at what time the MAC payload for a beacon frame is assembled before
+  // the next scheduled beacon transmission time; the value must be smaller than 
+  // the beacon interval plus the time for preparing the Tx operation
   BEACON_PAYLOAD_UPDATE_INTERVAL = 2500, 
 };
 
-typedef uint32_t ieee154_reftime_t;
+typedef uint32_t ieee154_timestamp_t;
 
 #endif