Changeset 380

Timestamp:

07/27/09 14:50:00 (15 years ago)

Author:

sriram

Message:

Adding code for communicating the nodes

Files:

• vtcross/branches/sriram/dsa.py (modified) (2 diffs)

vtcross/branches/sriram/dsa.py

@@ -237 +237 @@
         
                                         send_pkt(tb,payload)
-                                        #print "sending this data ",data,"\n"
+                                        print "sending this data ",data,"\n"
                                         n += len(payload)
                                         sys.stderr.write('.')
@@ -247 +247 @@
                         else:
                                 print "sync channel found..channel ",ch,"\n"  
+                                check_sync = 0
                                 mode = "traffic"
-                                sync_status = False
-                                break
-        ################################################end of sync mode####################################
-
+                                traffic_flag = False
+                                sync_status="False"
+        
+                ################################################end of sync mode####################################
+
+                ################################################Communications mode#################################
+                if mode == "traffic":
+                        print "Inside traffic mode"
+                        if check_sync == 0:
+                                time.sleep(0.8)
+                                if traffic_flag != True:
+                                        mode = "sync"
+                                        continue
+                                else:
+                                        check_sync = 1  
+
+                                nbytes = 15
+                                pkt_size = 15
+                                data_pktno = 0
+                                n = 0
+                                while n < nbytes:
+                                        #print >> myfile, "inside while"
+                                        if options_tx.from_file is None:
+                                                #data = (pkt_size - 2) * chr(data_pktno & 0xff) #0xff is 255
+                                                data = 'dHi how are you' #Sending this message
+                                                #print >> myfile, data
+                                                #print "printing data",data,"****\n"
+                                        else:
+                                                data = source_file.read(pkt_size - 2)
+                                                if data == '':
+                                                        break;
+        
+                        
+                                        payload = struct.pack('!15s', data)
+                                        #print "printing payload",payload,"**\n"
+                                
+                                        send_pkt(tb,payload)
+                                        #print "printing payload",payload,"**\n"
+                                        n += len(payload)
+                                        sys.stderr.write('.')
+                                        if options_tx.discontinuous and data_pktno % 5 == 4:
+                                                time.sleep(1)
+                                        data_pktno += 1
+                                        #print "before sleeping for 10 seconds and value of resend count is",resend_count
+                                        time.sleep(0.2)
+                                        ch_energy = tb.rxpath.probe.level() #check if primary user is present
+                                        print "channel energy is ",ch_energy,"\n"
+                                        if int(ch_energy) > 2e7: #if primary user is there then dont transmit on this channel
+                                                mode = "sync"
+