WSJT-X/lib/msk144code.f90

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Fortran
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program msk144code
! Provides examples of message packing, bit and symbol ordering,
! LDPC encoding, and other necessary details of the MSK144 protocol.
use packjt
character msg*37,msgsent*37,decoded,bad*1,msgtype*13
integer*4 i4tone(144)
logical*1 bcontest
include 'testmsg.f90'
nargs=iargc()
if(nargs.ne.1) then
print*,'Usage: msk144code "message"'
print*,' msk144code -t'
print*,' '
print*,'Examples:'
print*,' msk144code "KA1ABC WB9XYZ EN37"'
print*,' msk144code "<KA1ABC WB9XYZ> R-03"'
print*,' msk144code "KA1ABC WB9XYZ R EN37"'
go to 999
endif
call getarg(1,msg)
nmsg=1
if(msg(1:2).eq."-t") then
testmsg(NTEST+1)="<KA1ABC WB9XYZ> -03"
testmsg(NTEST+2)="<KA1ABC WB9XYZ> R+03"
testmsg(NTEST+3)="<KA1ABC WB9XYZ> RRR"
testmsg(NTEST+4)="<KA1ABC WB9XYZ> 73"
testmsg(NTEST+5)="KA1ABC WB9XYZ R EN37"
nmsg=NTEST+5
endif
write(*,1010)
1010 format(" Message Decoded Err? Type"/ &
74("-"))
do imsg=1,nmsg
if(nmsg.gt.1) msg=testmsg(imsg)
call fmtmsg(msg,iz) !To upper case, collapse multiple blanks
i1=len(trim(msg))-5
bcontest=.false.
if(msg(i1:i1+1).eq.'R ') bcontest=.true.
ichk=0
call genmsk_128_90(msg,ichk,bcontest,msgsent,i4tone,itype)
msgtype=""
if(itype.eq.1) msgtype="Std Msg"
if(itype.eq.2) msgtype="Type 1 prefix"
if(itype.eq.3) msgtype="Type 1 suffix"
if(itype.eq.4) msgtype="Type 2 prefix"
if(itype.eq.5) msgtype="Type 2 suffix"
if(itype.eq.6) msgtype="Free text"
if(itype.eq.7) msgtype="Hashed calls"
bad=" "
if(msgsent.ne.msg) bad="*"
write(*,1020) imsg,msg,msgsent,bad,itype,msgtype
1020 format(i2,'.',2x,a37,2x,a37,3x,a1,i3,": ",a13)
enddo
if(nmsg.eq.1) then
n=144
if(msg(1:1).eq."<") n=40
write(*,1030) i4tone(1:n)
1030 format(/'Channel symbols'/(72i1))
endif
999 end program msk144code