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Add routines needed for QRA65code.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6795 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
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Joe Taylor
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76
lib/genqra65.f90
Normal file
76
lib/genqra65.f90
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@ -0,0 +1,76 @@
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subroutine genqra65(msg0,ichk,msgsent,itone,itype)
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! Encodes a QRA65 message to yieild itone(1:126)
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use packjt
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character*22 msg0
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character*22 message !Message to be generated
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character*22 msgsent !Message as it will be received
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integer itone(126)
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character*3 cok !' ' or 'OOO'
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integer dgen(13)
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integer sent(63)
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integer nprc(126)
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data nprc/1,0,0,1,1,0,0,0,1,1,1,1,1,1,0,1,0,1,0,0, &
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0,1,0,1,1,0,0,1,0,0,0,1,1,1,0,0,1,1,1,1, &
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0,1,1,0,1,1,1,1,0,0,0,1,1,0,1,0,1,0,1,1, &
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0,0,1,1,0,1,0,1,0,1,0,0,1,0,0,0,0,0,0,1, &
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1,0,0,0,0,0,0,0,1,1,0,1,0,0,1,0,1,1,0,1, &
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0,1,0,1,0,0,1,1,0,0,1,0,0,1,0,0,0,0,1,1, &
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1,1,1,1,1,1/
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save
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if(msg0(1:1).eq.'@') then
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read(msg0(2:5),*,end=1,err=1) nfreq
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go to 2
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1 nfreq=1000
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2 itone(1)=nfreq
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else
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message=msg0
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do i=1,22
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if(ichar(message(i:i)).eq.0) then
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message(i:)=' '
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exit
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endif
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enddo
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do i=1,22 !Strip leading blanks
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if(message(1:1).ne.' ') exit
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message=message(i+1:)
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enddo
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call chkmsg(message,cok,nspecial,flip)
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if(nspecial.eq.0) then
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call packmsg(message,dgen,itype) !Pack message into 72 bits
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call unpackmsg(dgen,msgsent) !Unpack to get message sent
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if(ichk.ne.0) go to 999 !Return if checking only
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call qra65_enc(dgen,sent) !Encode using QRA65
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nsym=126 !Symbols per transmission
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k=0
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do j=1,nsym
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if(nprc(j).eq.0) then
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k=k+1
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itone(j)=sent(k)+2
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else
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itone(j)=0
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endif
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enddo
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else
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nsym=32
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k=0
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do j=1,nsym
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do n=1,4
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k=k+1
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if(iand(j,1).eq.1) itone(k)=0
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if(iand(j,1).eq.0) itone(k)=10*nspecial
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if(k.eq.126) go to 10
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enddo
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enddo
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10 msgsent=message
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itype=7
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endif
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endif
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999 return
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end subroutine genqra65
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21
lib/qra/qra65/qra65_subs.c
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21
lib/qra/qra65/qra65_subs.c
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// qra65_subs.c
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// Fortran interface routines for QRA65
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#include "qra65.h"
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#include <stdio.h>
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void qra65_enc_(int x[], int y[])
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{
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int ncall=0xf70c238; //K1ABC
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qra65codec *codec = qra65_init(0,ncall); //codec for ncall
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qra65_encode(codec, y, x);
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}
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void qra65_dec_(float r[], int xdec[], int* rc)
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{
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// int ncall=0xf70c238; //K1ABC
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int ncall=0x890c60c; //KA1ABC
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int i;
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qra65codec *codec = qra65_init(1,ncall); //codec for ncall
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*rc = qra65_decode(codec,xdec,r);
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}
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79
lib/qra65code.f90
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79
lib/qra65code.f90
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@ -0,0 +1,79 @@
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program QRA65code
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! Provides examples of message packing, bit and symbol ordering,
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! Reed Solomon encoding, and other necessary details of the QRA65
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! protocol.
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use packjt
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character*22 msg,msg0,msg1,decoded,cok*3,bad*1,msgtype*10
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integer dgen(12),sent(63),dec(12)
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real s3(0:63,1:63)
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include 'testmsg.f90'
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nargs=iargc()
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if(nargs.ne.1) then
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print*,'Usage: qra65code "message"'
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print*,' qra65code -t'
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go to 999
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endif
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call getarg(1,msg) !Get message from command line
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nmsg=1
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if(msg(1:2).eq."-t") nmsg=NTEST
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write(*,1010)
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1010 format(" Message Decoded Err? Type rc"/77("-"))
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do imsg=1,nmsg
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if(nmsg.gt.1) msg=testmsg(imsg)
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call fmtmsg(msg,iz) !To upper, collapse mult blanks
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msg0=msg !Input message
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call chkmsg(msg,cok,nspecial,flip) !See if it includes "OOO" report
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msg1=msg !Message without "OOO"
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call packmsg(msg1,dgen,itype) !Pack message into 12 six-bit bytes
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msgtype=""
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if(itype.eq.1) msgtype="Std Msg"
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if(itype.eq.2) msgtype="Type 1 pfx"
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if(itype.eq.3) msgtype="Type 1 sfx"
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if(itype.eq.4) msgtype="Type 2 pfx"
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if(itype.eq.5) msgtype="Type 2 sfx"
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if(itype.eq.6) msgtype="Free text"
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call qra65_enc(dgen,sent) !Encode using QRA65
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! Generate a simulated s3() array with moderately high S/N
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s3=1.0
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do j=1,63
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do i=0,63
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s3(i,j)=1.0 + 0.1*gran()
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enddo
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k=sent(j)
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s3(k,j)=s3(k,j) + 1.2
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enddo
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call qra65_dec(s3,dec,irc) !Decode
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decoded=" "
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if(irc.ge.0) then
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call unpackmsg(dec,decoded) !Unpack the user message
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call fmtmsg(decoded,iz)
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endif
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bad=" "
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if(decoded.ne.msg0) bad="*"
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write(*,1020) imsg,msg0,decoded,bad,itype,msgtype,irc
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1020 format(i2,'.',2x,a22,2x,a22,3x,a1,i3,": ",a13,i3)
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enddo
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if(nmsg.eq.1) then
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write(*,1030) dgen
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1030 format(/'Packed message, 6-bit symbols ',12i3) !Display packed symbols
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write(*,1040) sent
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1040 format(/'Information-carrying channel symbols'/(i5,20i3))
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write(*,1050) dec
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1050 format(/'Received message, 6-bit symbols ',12i3) !Display packed symbols
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endif
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999 end program QRA65code
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