mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-12-02 00:55:12 -05:00
56 lines
1.5 KiB
Fortran
56 lines
1.5 KiB
Fortran
subroutine genft8_174_91(msg,mygrid,bcontest,i5bit,msgsent,msgbits,itone)
|
|
|
|
! Encode an FT8 message, producing array itone().
|
|
|
|
use crc
|
|
use packjt
|
|
include 'ft8_params.f90'
|
|
character*22 msg,msgsent
|
|
character*6 mygrid
|
|
character*91 cbits
|
|
logical bcontest,checksumok
|
|
integer*4 i4Msg6BitWords(12) !72-bit message as 6-bit words
|
|
integer*1 msgbits(91),codeword(174)
|
|
integer*1, target:: i1Msg8BitBytes(12)
|
|
integer itone(79)
|
|
integer icos7(0:6)
|
|
integer graymap(0:7)
|
|
data icos7/3,1,4,0,6,5,2/ !Costas 7x7 tone pattern
|
|
data graymap/0,1,3,2,7,6,4,5/
|
|
|
|
call packmsg(msg,i4Msg6BitWords,itype,bcontest) !Pack into 12 6-bit bytes
|
|
call unpackmsg(i4Msg6BitWords,msgsent,bcontest,mygrid) !Unpack to get msgsent
|
|
|
|
write(cbits,1000) i4Msg6BitWords,8*i5bit
|
|
1000 format(12b6.6,b8.8)
|
|
read(cbits,1001) i1Msg8BitBytes(1:10)
|
|
1001 format(10b8)
|
|
i1Msg8BitBytes(10)=iand(i1Msg8BitBytes(10),128+64+32+16+8)
|
|
i1Msg8BitBytes(11:12)=0
|
|
icrc14=crc14(c_loc(i1Msg8BitBytes),12)
|
|
i1Msg8BitBytes(11)=icrc14/256
|
|
i1Msg8BitBytes(12)=iand (icrc14,255)
|
|
|
|
write(cbits,1003) i4Msg6BitWords,i5bit,icrc14
|
|
1003 format(12b6.6,b5.5,b14.14)
|
|
read(cbits,1004) msgbits
|
|
1004 format(91i1)
|
|
|
|
call encode174_91(msgbits,codeword) !Encode the test message
|
|
|
|
! Message structure: S7 D29 S7 D29 S7
|
|
itone(1:7)=icos7
|
|
itone(36+1:36+7)=icos7
|
|
itone(NN-6:NN)=icos7
|
|
k=7
|
|
do j=1,ND
|
|
i=3*j -2
|
|
k=k+1
|
|
if(j.eq.30) k=k+7
|
|
indx=codeword(i)*4 + codeword(i+1)*2 + codeword(i+2)
|
|
itone(k)=graymap(indx)
|
|
enddo
|
|
|
|
return
|
|
end subroutine genft8_174_91
|