mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-18 10:01:57 -05:00
47 lines
1.1 KiB
Fortran
47 lines
1.1 KiB
Fortran
subroutine genft8(msg,i3,n3,msgsent,msgbits,itone)
|
|
|
|
! Encode an FT8 message, producing array itone().
|
|
|
|
use packjt77
|
|
include 'ft8_params.f90'
|
|
character msg*37,msgsent*37
|
|
character*77 c77
|
|
integer*1 msgbits(77),codeword(174)
|
|
integer itone(79)
|
|
integer icos7(0:6)
|
|
integer graymap(0:7)
|
|
logical unpk77_success
|
|
data icos7/3,1,4,0,6,5,2/ !Costas 7x7 tone pattern
|
|
data graymap/0,1,3,2,5,6,4,7/
|
|
|
|
i3=-1
|
|
n3=-1
|
|
call pack77(msg,i3,n3,c77)
|
|
call unpack77(c77,0,msgsent,unpk77_success)
|
|
read(c77,'(77i1)',err=1) msgbits
|
|
if(unpk77_success) go to 2
|
|
1 msgbits=0
|
|
itone=0
|
|
msgsent='*** bad message *** '
|
|
go to 900
|
|
|
|
entry get_ft8_tones_from_77bits(msgbits,itone)
|
|
|
|
2 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
|
|
|
|
900 return
|
|
end subroutine genft8
|