2017-07-28 11:50:13 -04:00
|
|
|
subroutine genft8(msg,mygrid,bcontest,msgsent,msgbits,itone)
|
2017-07-08 10:06:48 -04:00
|
|
|
|
|
|
|
|
! Encode an FT8 message, producing array itone().
|
|
|
|
|
|
|
|
|
|
use crc
|
|
|
|
|
use packjt
|
|
|
|
|
include 'ft8_params.f90'
|
|
|
|
|
character*22 msg,msgsent
|
2017-07-28 11:50:13 -04:00
|
|
|
character*6 mygrid,g1,g2
|
2017-07-08 10:06:48 -04:00
|
|
|
character*87 cbits
|
2017-07-28 11:50:13 -04:00
|
|
|
logical*1 bcontest
|
|
|
|
|
logical isgrid
|
2017-07-08 10:06:48 -04:00
|
|
|
integer*4 i4Msg6BitWords(12) !72-bit message as 6-bit words
|
|
|
|
|
integer*1 msgbits(KK),codeword(3*ND)
|
|
|
|
|
integer*1, target:: i1Msg8BitBytes(11)
|
|
|
|
|
integer itone(NN)
|
|
|
|
|
integer icos7(0:6)
|
|
|
|
|
data icos7/2,5,6,0,4,1,3/ !Costas 7x7 tone pattern
|
|
|
|
|
|
2017-07-28 11:50:13 -04:00
|
|
|
isgrid(g1)=g1(1:1).ge.'A' .and. g1(1:1).le.'R' .and. g1(2:2).ge.'A' .and. &
|
|
|
|
|
g1(2:2).le.'R' .and. g1(3:3).ge.'0' .and. g1(3:3).le.'9' .and. &
|
|
|
|
|
g1(4:4).ge.'0' .and. g1(4:4).le.'9' .and. g1(1:4).ne.'RR73'
|
|
|
|
|
|
|
|
|
|
if(bcontest) then
|
|
|
|
|
i0=index(msg,' R ') + 3 !Check for ' R ' in message
|
|
|
|
|
g1=msg(i0:i0+3)//' '
|
|
|
|
|
if(isgrid(g1)) then !Check for ' R grid'
|
|
|
|
|
call grid2deg(g1,dlong,dlat)
|
|
|
|
|
dlong=dlong+180.0
|
|
|
|
|
if(dlong.gt.180.0) dlong=dlong-360.0
|
|
|
|
|
dlat=-dlat
|
|
|
|
|
call deg2grid(dlong,dlat,g2) !g2=antipodes grid
|
|
|
|
|
msg=msg(1:i0-3)//g2(1:4) !Send message with g2
|
|
|
|
|
endif
|
|
|
|
|
endif
|
|
|
|
|
|
2017-07-08 10:06:48 -04:00
|
|
|
call packmsg(msg,i4Msg6BitWords,itype) !Pack into 12 6-bit bytes
|
|
|
|
|
call unpackmsg(i4Msg6BitWords,msgsent) !Unpack to get msgsent
|
|
|
|
|
i3bit=0 !### temporary ###
|
|
|
|
|
write(cbits,1000) i4Msg6BitWords,32*i3bit
|
|
|
|
|
1000 format(12b6.6,b8.8)
|
|
|
|
|
read(cbits,1001) i1Msg8BitBytes(1:10)
|
|
|
|
|
1001 format(10b8)
|
|
|
|
|
i1Msg8BitBytes(10)=iand(i1Msg8BitBytes(10),128+64+32)
|
|
|
|
|
i1Msg8BitBytes(11)=0
|
|
|
|
|
icrc12=crc12(c_loc(i1Msg8BitBytes),11)
|
|
|
|
|
|
|
|
|
|
! For reference, here's how to check the CRC
|
|
|
|
|
! i1Msg8BitBytes(10)=icrc12/256
|
|
|
|
|
! i1Msg8BitBytes(11)=iand (icrc12,255)
|
|
|
|
|
! checksumok = crc12_check(c_loc (i1Msg8BitBytes), 11)
|
|
|
|
|
! if( checksumok ) write(*,*) 'Good checksum'
|
|
|
|
|
|
|
|
|
|
write(cbits,1003) i4Msg6BitWords,i3bit,icrc12
|
|
|
|
|
1003 format(12b6.6,b3.3,b12.12)
|
|
|
|
|
read(cbits,1004) msgbits
|
|
|
|
|
1004 format(87i1)
|
|
|
|
|
|
|
|
|
|
call encode174(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
|
|
|
|
|
itone(k)=codeword(i)*4 + codeword(i+1)*2 + codeword(i+2)
|
|
|
|
|
enddo
|
|
|
|
|
|
|
|
|
|
return
|
|
|
|
|
end subroutine genft8
|
