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) !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) !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