mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-18 10:01:57 -05:00
2e9a64aebe
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8200 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
49 lines
1.4 KiB
Fortran
49 lines
1.4 KiB
Fortran
subroutine extractmessage174(decoded,msgreceived,ncrcflag,recent_calls,nrecent)
|
|
use iso_c_binding, only: c_loc,c_size_t
|
|
use crc
|
|
use packjt
|
|
|
|
character*22 msgreceived
|
|
character*12 call1,call2
|
|
character*12 recent_calls(nrecent)
|
|
character*87 cbits
|
|
integer*1 decoded(87)
|
|
integer*1, target:: i1Dec8BitBytes(11)
|
|
integer*4 i4Dec6BitWords(12)
|
|
|
|
! Write decoded bits into cbits: 75-bit message plus 12-bit CRC
|
|
write(cbits,1000) decoded
|
|
1000 format(87i1)
|
|
read(cbits,1001) i1Dec8BitBytes
|
|
1001 format(11b8)
|
|
read(cbits,1002) ncrc12 !Received CRC12
|
|
1002 format(75x,b12)
|
|
|
|
i1Dec8BitBytes(10)=iand(i1Dec8BitBytes(10),128+64+32)
|
|
i1Dec8BitBytes(11)=0
|
|
icrc12=crc12(c_loc(i1Dec8BitBytes),11) !CRC12 computed from 75 msg bits
|
|
|
|
if(ncrc12.eq.icrc12) then
|
|
! CRC12 checks out --- unpack 72-bit message
|
|
do ibyte=1,12
|
|
itmp=0
|
|
do ibit=1,6
|
|
itmp=ishft(itmp,1)+iand(1,decoded((ibyte-1)*6+ibit))
|
|
enddo
|
|
i4Dec6BitWords(ibyte)=itmp
|
|
enddo
|
|
call unpackmsg144(i4Dec6BitWords,msgreceived,call1,call2)
|
|
ncrcflag=1
|
|
if( call1(1:2) .ne. 'CQ' .and. call1(1:2) .ne. ' ' ) then
|
|
call update_recent_calls(call1,recent_calls,nrecent)
|
|
endif
|
|
if( call2(1:2) .ne. ' ' ) then
|
|
call update_recent_calls(call2,recent_calls,nrecent)
|
|
endif
|
|
else
|
|
msgreceived=' '
|
|
ncrcflag=-1
|
|
endif
|
|
return
|
|
end subroutine extractmessage174
|