Initial Commit

lib/qra64code.f90

@@ -0,0 +1,66 @@
+program QRA64code
+
+! Provides examples of message packing, bit and symbol ordering,
+! QRA (63,12) encoding, and other necessary details of the QRA64
+! protocol.  
+
+  use packjt
+  character*22 msg,msg0,msg1,decoded,cok*3,msgtype*10,arg*12
+  character*6 mycall
+  logical ltext
+  integer dgen(12),sent(63),dec(12)
+  integer icos7(0:6)
+  data icos7/2,5,6,0,4,1,3/     !Defines a 7x7 Costas array
+
+  include 'testmsg.f90'
+
+  nargs=iargc()
+  if(nargs.lt.1) then
+     print*,'Usage: qra64code "message"'
+     print*,'       qra64code -t'
+     go to 999
+  endif
+
+  call getarg(1,msg)                     !Get message from command line
+  nmsg=1
+  if(msg(1:2).eq."-t") nmsg=NTEST
+
+  write(*,1010)
+1010 format("     Message                 Decoded                Err? Type"/74("-"))
+
+  do imsg=1,nmsg
+     if(nmsg.gt.1) msg=testmsg(imsg)
+    call fmtmsg(msg,iz)                    !To upper, collapse mult blanks
+     msg0=msg                               !Input message
+     call chkmsg(msg,cok,nspecial,flip)     !See if it includes "OOO" report
+     msg1=msg                               !Message without "OOO"
+     call packmsg(msg1,dgen,itype,.false.) !Pack message into 12 six-bit bytes
+     msgtype=""
+     if(itype.eq.1) msgtype="Std Msg"
+     if(itype.eq.2) msgtype="Type 1 pfx"
+     if(itype.eq.3) msgtype="Type 1 sfx"
+     if(itype.eq.4) msgtype="Type 2 pfx"
+     if(itype.eq.5) msgtype="Type 2 sfx"
+     if(itype.eq.6) msgtype="Free text"
+
+     call qra64_enc(dgen,sent)              !Encode using QRA64
+
+     call unpackmsg(dgen,decoded,.false.,'      ') !Unpack the user message
+     call fmtmsg(decoded,iz)
+     ii=imsg
+     write(*,1020) ii,msg0,decoded,itype,msgtype
+1020 format(i4,1x,a22,2x,a22,4x,i3,": ",a13)
+  enddo
+
+  if(nmsg.eq.1) then
+     write(*,1030) dgen
+1030 format(/'Packed message, 6-bit symbols ',12i3) !Display packed symbols
+
+     write(*,1040) sent
+1040 format(/'Information-carrying channel symbols'/(i5,29i3))
+
+     write(*,1050) 10*icos7,sent(1:32),10*icos7,sent(33:63),10*icos7
+1050 format(/'Channel symbols including sync'/(i5,29i3))
+  endif
+  
+999 end program QRA64code