Tweak detection of "No Rx data" in GUI.

Suppress attempts to decode partial buffer on program startup.


git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/map65@992 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

map65.py

@@ -994,7 +994,7 @@ def update():
         azdist()
         g.nfreq=nfreq.get()
         kxp=int(Audio.datcom.kxp)
-        if kxp-kxp0 < 50000 and \
+        if kxp-kxp0 >=0 and kxp-kxp0 < 50000 and \
            ((not Audio.gcom2.lauto) or (not Audio.gcom1.transmitting)):
             msg5.configure(text='No Rx data',bg='red')
         else:

recvpkt.F90

@@ -21,9 +21,10 @@ subroutine recvpkt(iarg)
 
 1 call setup_rsocket(multicast)     !Open socket for multicast/unicast data
   k=0
+  k0=0
   kk=0
   kxp=0
-  kb=1
+  kb=2
   nsec0=-999
   fcenter=144.125                   !Default (startup) frequency)
   multicast0=multicast
@@ -43,6 +44,7 @@ subroutine recvpkt(iarg)
   if(ns.lt.ns0) then
      if(ntx.eq.0) kb=3-kb
      k=(kb-1)*60*96000
+     k0=k
      ndone1=0
      ntx=0
      lost_tot=0
@@ -105,7 +107,7 @@ subroutine recvpkt(iarg)
 
 ! If we have not transmitted in this minute, see if it's time to start FFTs
      if(ntx.eq.0) then
-        if(ns.ge.nt1 .and. ndone1.eq.0) then
+        if(ns.ge.nt1 .and. ndone1.eq.0 .and. (k-k0)/96000.ge.48) then
            nutc=mutc
            fcenter=center_freq
            kbuf=kb
@@ -115,7 +117,7 @@ subroutine recvpkt(iarg)
         endif
 
 ! See if it's time to start second stage of processing
-        if(ns.ge.nt2) then
+        if(ndone1.eq.1 .and. ns.ge.nt2) then
            kk=k
            nlost=lost_tot                         ! Save stats for printout
         endif