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