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94 lines
2.6 KiB
Fortran
94 lines
2.6 KiB
Fortran
subroutine gen65(msg00,ichk,msgsent0,itone,itype) BIND(c)
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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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use packjt
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character*1 msg00(23),msgsent0(23)
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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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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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do i=1,22
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msg0(i:i)=msg00(i)
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enddo
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if(msg0(1:1).eq.'@') then
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read(msg0(2:5),*,end=1,err=1) nfreq
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go to 2
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1 nfreq=1000
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2 itone(1)=nfreq
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else
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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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call chkmsg(message,cok,nspecial,flip)
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ntest=0
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if(flip.lt.0.0) ntest=1
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if(nspecial.eq.0) then
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call packmsg(message,dgen,itype) !Pack message into 72 bits
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call unpackmsg(dgen,msgsent) !Unpack to get message sent
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msgsent(20:22)=cok
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call fmtmsg(msgsent,iz)
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if(ichk.ne.0) go to 900 !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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k=0
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do j=1,nsym
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if(nprc(j).eq.ntest) 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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else
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nsym=32
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k=0
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do j=1,nsym
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do n=1,4
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k=k+1
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if(iand(j,1).eq.1) itone(k)=0
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if(iand(j,1).eq.0) itone(k)=10*nspecial
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if(k.eq.126) go to 10
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enddo
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enddo
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10 msgsent=message
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itype=7
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endif
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endif
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900 do i=1,22
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msgsent0(i)=msgsent(i:i)
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enddo
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msgsent0(23)=char(0)
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return
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end subroutine gen65
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