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66 lines
1.9 KiB
Fortran
66 lines
1.9 KiB
Fortran
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subroutine gen65(msg0,ichk,msgsent,itone,itext)
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! Encodes a JT65 message to yieild itone(1:126)
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! Temporarily, does not implement EME shorthands
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character*22 msg0
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character*22 message !Message to be generated
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character*22 msgsent !Message as it will be received
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integer itone(126)
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! character*3 cok !' ' or 'OOO'
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integer dgen(13)
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integer sent(63)
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logical text
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integer nprc(126)
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data nprc/1,0,0,1,1,0,0,0,1,1,1,1,1,1,0,1,0,1,0,0, &
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0,1,0,1,1,0,0,1,0,0,0,1,1,1,0,0,1,1,1,1, &
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0,1,1,0,1,1,1,1,0,0,0,1,1,0,1,0,1,0,1,1, &
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0,0,1,1,0,1,0,1,0,1,0,0,1,0,0,0,0,0,0,1, &
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1,0,0,0,0,0,0,0,1,1,0,1,0,0,1,0,1,1,0,1, &
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0,1,0,1,0,0,1,1,0,0,1,0,0,1,0,0,0,0,1,1, &
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1,1,1,1,1,1/
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save
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message=msg0
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do i=1,22
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if(ichar(message(i:i)).eq.0) then
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message(i:)=' '
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exit
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endif
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enddo
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do i=1,22 !Strip leading blanks
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if(message(1:1).ne.' ') exit
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message=message(i+1:)
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enddo
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nspecial=0
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! call chkmsg(message,cok,nspecial,flip)
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if(nspecial.eq.0) then
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call packmsg(message,dgen,text) !Pack message into 72 bits
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itext=0
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if(text) itext=1
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call unpackmsg(dgen,msgsent) !Unpack to get message sent
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if(ichk.ne.0) go to 999 !Return if checking only
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call rs_encode(dgen,sent) !Apply Reed-Solomon code
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call interleave63(sent,1) !Apply interleaving
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call graycode65(sent,63,1) !Apply Gray code
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nsym=126 !Symbols per transmission
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else
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nsym=32
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endif
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k=0
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do j=1,nsym
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if(nprc(j).eq.0) then
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k=k+1
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itone(j)=sent(k)+2
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else
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itone(j)=0
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endif
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enddo
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999 return
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end subroutine gen65
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