X-Git-Url: https://oss.titaniummirror.com/gitweb/?a=blobdiff_plain;f=tos%2Fchips%2Ftda5250%2Fmac%2FCsmaMacP.nc;h=e612c2f5ee039fba77bf56c88eac8858e6a62d00;hb=e714e397b4edbe93882af65c4cb3014ceb477fe9;hp=28de91414a2145e3e98d880136962514a85b774c;hpb=337d0b13acf569c2640b3ed7b7f5c7cec35d7ddd;p=tinyos-2.x.git

diff --git a/tos/chips/tda5250/mac/CsmaMacP.nc b/tos/chips/tda5250/mac/CsmaMacP.nc
index 28de9141..e612c2f5 100644
--- a/tos/chips/tda5250/mac/CsmaMacP.nc
+++ b/tos/chips/tda5250/mac/CsmaMacP.nc
@@ -50,7 +50,6 @@ module CsmaMacP {
         interface MacSend;
         interface MacReceive;
         interface Packet;
-        interface McuPowerOverride;
     }
     uses {
         interface StdControl as CcaStdControl;
@@ -88,18 +87,19 @@ implementation
 {
 
     enum {
-        BYTE_TIME=13,                // byte at 38400 kBit/s, 4b6b encoded
-        PREAMBLE_BYTE_TIME=9,        // byte at 38400 kBit/s, no coding
-        PHY_HEADER_TIME=51,          // 6 Phy Preamble at 38400
+        BYTE_TIME=21,                 // byte at 23405 kBit/s, 4b6b encoded
+        PREAMBLE_BYTE_TIME=14,        // byte at 23405 kBit/s, no coding
+        PHY_HEADER_TIME=84,           // 6 Phy Preamble at 23405 bits/s
+
         SUB_HEADER_TIME=PHY_HEADER_TIME + sizeof(tda5250_header_t)*BYTE_TIME,
-        SUB_FOOTER_TIME=2*BYTE_TIME, // 2 bytes crc 38400 kBit/s with 4b6b encoding
+        SUB_FOOTER_TIME=2*BYTE_TIME, // 2 bytes crc 
         MAXTIMERVALUE=0xFFFF,        // helps to compute backoff
         DATA_DETECT_TIME=17,
-        RX_SETUP_TIME=111,    // time to set up receiver
-        TX_SETUP_TIME=69,     // time to set up transmitter
+        RX_SETUP_TIME=102,    // time to set up receiver
+        TX_SETUP_TIME=58,     // time to set up transmitter
         ADDED_DELAY = 30,
-        RX_ACK_TIMEOUT=RX_SETUP_TIME + PHY_HEADER_TIME + 19 + 2*ADDED_DELAY,
-        TX_GAP_TIME=RX_ACK_TIMEOUT + TX_SETUP_TIME + 11,
+        RX_ACK_TIMEOUT=RX_SETUP_TIME + PHY_HEADER_TIME + 2*ADDED_DELAY,
+        TX_GAP_TIME=RX_ACK_TIMEOUT + TX_SETUP_TIME + 33,
         MAX_SHORT_RETRY=7,
         MAX_LONG_RETRY=4,
         BACKOFF_MASK=0xFFF,  // minimum time around one packet time
@@ -107,8 +107,8 @@ implementation
         TOKEN_ACK_FLAG = 64,
         TOKEN_ACK_MASK = 0x3f,
         INVALID_SNR = 0xffff,
-        MSG_TABLE_ENTRIES=20,
-        MAX_AGE=2*MAX_LONG_RETRY*MAX_SHORT_RETRY,
+        MSG_TABLE_ENTRIES=16,
+        MAX_AGE=0xff,
     };
     
 /**************** Module Global Variables  *****************/
@@ -167,7 +167,7 @@ implementation
         unsigned i;
         atomic {
             for(i = 0; i < MSG_TABLE_ENTRIES; i++) {
-                if(knownMsgTable[i].age <= MAX_AGE) ++knownMsgTable[i].age;
+                if(knownMsgTable[i].age < MAX_AGE) ++knownMsgTable[i].age;
             }
         }
     }
@@ -328,10 +328,10 @@ implementation
                 restLaufzeit = restLaufzeit - now;
             }
             else {
-                restLaufzeit +=  MAXTIMERVALUE - now;
+                restLaufzeit =  (uint16_t)(-1) - restLaufzeit + now;
             }
             if(restLaufzeit > BACKOFF_MASK) {
-                restLaufzeit = backoff(0);
+                restLaufzeit = call Random.rand16() & 0xFF;
             }
             setFlag(&flags, RESUME_BACKOFF);
         }
@@ -1012,11 +1012,6 @@ implementation
     
     // we don't care about urgent Resource requestes
     async event void RadioResourceRequested.immediateRequested() {}
-
-    /** prevent MCU from going into a too low power mode */
-    async command mcu_power_t McuPowerOverride.lowestState() {
-        return MSP430_POWER_LPM1;
-    }
 }