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git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7719 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
25 lines
655 B
Fortran
25 lines
655 B
Fortran
subroutine chkcrc12a(decoded,nbadcrc)
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use crc
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integer*1 decoded(87)
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integer*1, target:: i1Dec8BitBytes(11)
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character*87 cbits
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! Write decoded bits into cbits: 75-bit message plus 12-bit CRC
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write(cbits,1000) decoded
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1000 format(87i1)
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read(cbits,1001) i1Dec8BitBytes
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1001 format(11b8)
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read(cbits,1002) ncrc12 !Received CRC12
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1002 format(75x,b12)
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i1Dec8BitBytes(10)=iand(i1Dec8BitBytes(10),128+64+32)
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i1Dec8BitBytes(11)=0
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icrc12=crc12(c_loc(i1Dec8BitBytes),11) !CRC12 computed from 75 msg bits
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nbadcrc=1
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if(ncrc12.eq.icrc12) nbadcrc=0
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return
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end subroutine chkcrc12a
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