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https://github.com/saitohirga/WSJT-X.git
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0e96882d8b
Routine packmsg now tries the shortlist (Type 1 prefix or suffix) first. Then it tries to to make a valid message using a Type 2 prefix or suffix. If both fail, it packs the first 13 characters as a free-text message. The GUI now generates the most useful messages with compound callsigns of all valid types. git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@4533 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
66 lines
2.2 KiB
Fortran
66 lines
2.2 KiB
Fortran
program JT65code
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! Provides examples of message packing, bit and symbol ordering,
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! Reed Solomon encoding, and other necessary details of the JT65
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! protocol.
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character*22 msg,msg0,msg1,decoded,cok*3,bad*1,msgtype*10
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integer dgen(12),sent(63),recd(12),era(51)
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nargs=iargc()
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if(nargs.ne.1) then
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print*,'Usage: JT65code "message"'
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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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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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if(nspecial.gt.0) then !or is a shorthand message
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if(nspecial.eq.2) decoded="RO"
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if(nspecial.eq.3) decoded="RRR"
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if(nspecial.eq.4) decoded="73"
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itype=-1
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msgtype="Shorthand"
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go to 10
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endif
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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 rs_encode(dgen,sent) !RS encode
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call interleave63(sent,1) !Interleave channel symbols
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call graycode(sent,63,1,sent) !Apply Gray code
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call graycode(sent,63,-1,sent)
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call interleave63(sent,-1)
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call rs_decode(sent,era,0,recd,nerr)
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call unpackmsg(recd,decoded) !Unpack the user message
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if(cok.eq."OOO") decoded(20:22)=cok
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call fmtmsg(decoded,iz)
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10 write(*,1010)
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1010 format("Message Decoded Err"/ &
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"-----------------------------------------------------------------")
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bad=" "
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if(decoded.ne.msg0) bad="*"
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write(*,1020) msg0,decoded,bad,itype,msgtype
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1020 format(a22,2x,a22,3x,a1,i3,": ",a10)
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if(nspecial.gt.0) go to 999
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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'/(i5,20i3))
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999 end program JT65code
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