2014-01-30 18:03:21 +00:00
|
|
|
program JT65code
|
|
|
|
|
|
|
|
|
|
! Provides examples of message packing, bit and symbol ordering,
|
|
|
|
|
! Reed Solomon encoding, and other necessary details of the JT65
|
|
|
|
|
! protocol.
|
|
|
|
|
|
2015-04-22 17:48:03 +00:00
|
|
|
use packjt
|
2014-10-19 00:56:41 +00:00
|
|
|
character*22 msg,msg0,msg1,decoded,cok*3,bad*1,msgtype*10
|
2015-10-24 18:09:50 +00:00
|
|
|
integer dgen(12),sent(63),tmp(63),recd(12),era(51)
|
2015-04-22 17:48:03 +00:00
|
|
|
include 'testmsg.f90'
|
2014-01-30 18:03:21 +00:00
|
|
|
|
|
|
|
|
nargs=iargc()
|
|
|
|
|
if(nargs.ne.1) then
|
2014-10-19 01:31:17 +00:00
|
|
|
print*,'Usage: jt65code "message"'
|
|
|
|
|
print*,' jt65code -t'
|
2014-01-30 18:03:21 +00:00
|
|
|
go to 999
|
|
|
|
|
endif
|
|
|
|
|
|
2014-10-19 00:56:41 +00:00
|
|
|
call getarg(1,msg) !Get message from command line
|
2014-10-19 01:29:30 +00:00
|
|
|
nmsg=1
|
|
|
|
|
if(msg(1:2).eq."-t") then
|
2015-04-22 17:48:03 +00:00
|
|
|
testmsg(NTEST+1)="KA1ABC WB9XYZ EN34 OOO"
|
|
|
|
|
testmsg(NTEST+2)="KA1ABC WB9XYZ OOO"
|
|
|
|
|
testmsg(NTEST+3)="RO"
|
|
|
|
|
testmsg(NTEST+4)="RRR"
|
|
|
|
|
testmsg(NTEST+5)="73"
|
|
|
|
|
nmsg=NTEST+5
|
2014-01-30 18:03:21 +00:00
|
|
|
endif
|
|
|
|
|
|
2014-10-19 01:29:30 +00:00
|
|
|
write(*,1010)
|
2015-04-22 17:48:03 +00:00
|
|
|
1010 format(" Message Decoded Err? Type"/ &
|
|
|
|
|
74("-"))
|
2014-10-19 01:29:30 +00:00
|
|
|
|
|
|
|
|
do imsg=1,nmsg
|
|
|
|
|
if(nmsg.gt.1) msg=testmsg(imsg)
|
|
|
|
|
|
|
|
|
|
call fmtmsg(msg,iz) !To upper, collapse mult blanks
|
|
|
|
|
msg0=msg !Input message
|
|
|
|
|
call chkmsg(msg,cok,nspecial,flip) !See if it includes "OOO" report
|
|
|
|
|
msg1=msg !Message without "OOO"
|
|
|
|
|
|
|
|
|
|
if(nspecial.gt.0) then !or is a shorthand message
|
|
|
|
|
if(nspecial.eq.2) decoded="RO"
|
|
|
|
|
if(nspecial.eq.3) decoded="RRR"
|
|
|
|
|
if(nspecial.eq.4) decoded="73"
|
|
|
|
|
itype=-1
|
|
|
|
|
msgtype="Shorthand"
|
|
|
|
|
go to 10
|
|
|
|
|
endif
|
|
|
|
|
|
|
|
|
|
call packmsg(msg1,dgen,itype) !Pack message into 12 six-bit bytes
|
|
|
|
|
msgtype=""
|
|
|
|
|
if(itype.eq.1) msgtype="Std Msg"
|
|
|
|
|
if(itype.eq.2) msgtype="Type 1 pfx"
|
|
|
|
|
if(itype.eq.3) msgtype="Type 1 sfx"
|
|
|
|
|
if(itype.eq.4) msgtype="Type 2 pfx"
|
|
|
|
|
if(itype.eq.5) msgtype="Type 2 sfx"
|
|
|
|
|
if(itype.eq.6) msgtype="Free text"
|
|
|
|
|
|
|
|
|
|
call rs_encode(dgen,sent) !RS encode
|
|
|
|
|
call interleave63(sent,1) !Interleave channel symbols
|
|
|
|
|
call graycode(sent,63,1,sent) !Apply Gray code
|
2015-10-24 18:09:50 +00:00
|
|
|
|
|
|
|
|
call graycode(sent,63,-1,tmp) !Remove Gray code
|
|
|
|
|
call interleave63(tmp,-1) !Remove interleaving
|
|
|
|
|
call rs_decode(tmp,era,0,recd,nerr) !Decode the message
|
2014-10-19 01:29:30 +00:00
|
|
|
call unpackmsg(recd,decoded) !Unpack the user message
|
|
|
|
|
if(cok.eq."OOO") decoded(20:22)=cok
|
|
|
|
|
call fmtmsg(decoded,iz)
|
|
|
|
|
|
|
|
|
|
10 bad=" "
|
|
|
|
|
if(decoded.ne.msg0) bad="*"
|
2015-04-22 17:48:03 +00:00
|
|
|
write(*,1020) imsg,msg0,decoded,bad,itype,msgtype
|
|
|
|
|
1020 format(i2,'.',2x,a22,2x,a22,3x,a1,i3,": ",a13)
|
2014-10-19 01:29:30 +00:00
|
|
|
enddo
|
2014-10-19 00:56:41 +00:00
|
|
|
|
2014-10-19 01:29:30 +00:00
|
|
|
if(nmsg.eq.1 .and. nspecial.eq.0) then
|
|
|
|
|
write(*,1030) dgen
|
2014-10-19 00:56:41 +00:00
|
|
|
1030 format(/'Packed message, 6-bit symbols ',12i3) !Display packed symbols
|
|
|
|
|
|
2014-10-19 01:29:30 +00:00
|
|
|
write(*,1040) sent
|
2014-10-19 00:56:41 +00:00
|
|
|
1040 format(/'Information-carrying channel symbols'/(i5,20i3))
|
2014-10-19 01:29:30 +00:00
|
|
|
endif
|
2014-01-30 18:03:21 +00:00
|
|
|
|
|
|
|
|
999 end program JT65code
|
