mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-05 17:01:17 -05:00
6be4f3d376
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6272 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
134 lines
3.4 KiB
C
134 lines
3.4 KiB
C
/*
|
|
./jt65code "Hi there"
|
|
Message Decoded Err? Type
|
|
--------------------------------------------------------------------------
|
|
1. HI THERE HI THERE 6: Free text
|
|
|
|
Packed message, 6-bit symbols 25 57 1 8 29 22 61 14 46 15 56 28
|
|
|
|
Information-carrying channel symbols
|
|
34 27 12 48 28 59 12 38 25 47 21 40 46 9 12 24 36 7 4 15 49
|
|
50 6 49 56 2 19 15 7 59 22 7 5 14 20 3 29 56 2 9 17 14
|
|
45 26 43 31 17 10 50 31 2 25 57 1 8 29 22 61 14 46 15 56 28
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <time.h>
|
|
#include <string.h>
|
|
#include "rs.h"
|
|
#include "init_random_seed.h"
|
|
|
|
static void *rs;
|
|
|
|
int main(){
|
|
int hi_there[]={25,57,1,8,29,22,61,14,46,15,56,28};
|
|
int data[12], revdat[12];
|
|
int parity[51];
|
|
int rxdat[63], errlocs[63];
|
|
int era_pos[51];
|
|
int i, numera, nerr, nn=63;
|
|
|
|
FILE *datfile;
|
|
//nsec,xlambda,maxe,nads,mrsym,mrprob,mr2sym,mr2prob
|
|
int nsec, maxe, nads;
|
|
float xlambda;
|
|
int mrsym[63],mrprob[63],mr2sym[63],mr2prob[63];
|
|
int nsec2,ncount,dat4[12];
|
|
|
|
init_random_seed();
|
|
|
|
datfile=fopen("kvasd.dat","rb");
|
|
if( !datfile ) {
|
|
printf("Unable to open kvasd.dat\n");
|
|
return 1;
|
|
} else {
|
|
fread(&nsec,sizeof(int),1,datfile);
|
|
fread(&xlambda,sizeof(float),1,datfile);
|
|
fread(&maxe,sizeof(int),1,datfile);
|
|
fread(&nads,sizeof(int),1,datfile);
|
|
fread(&mrsym,sizeof(int),63,datfile);
|
|
fread(&mrprob,sizeof(int),63,datfile);
|
|
fread(&mr2sym,sizeof(int),63,datfile);
|
|
fread(&mr2prob,sizeof(int),63,datfile);
|
|
fread(&nsec2,sizeof(int),1,datfile);
|
|
fread(&ncount,sizeof(int),1,datfile);
|
|
fread(&dat4,sizeof(int),12,datfile);
|
|
fclose(datfile);
|
|
printf("%d %f %d %d \n",nsec,xlambda,maxe,nads);
|
|
for (i=0; i<63; i++) printf("%d ",mrsym[i]);
|
|
printf("\n");
|
|
// for (i=0; i<63; i++) printf("%d ",mrprob[i]);
|
|
// printf("\n");
|
|
// for (i=0; i<63; i++) printf("%d ",mr2sym[i]);
|
|
// printf("\n");
|
|
// for (i=0; i<63; i++) printf("%d ",mr2prob[i]);
|
|
// printf("\n");
|
|
// printf("%d %d \n",nsec2,ncount);
|
|
printf("kv decode: ");
|
|
for (i=0; i<12; i++) printf("%d ",dat4[i]);
|
|
printf("\n");
|
|
}
|
|
|
|
// initialize the ka9q reed solomon encoder/decoder
|
|
unsigned int symsize=6, gfpoly=0x43, fcr=3, prim=1, nroots=51;
|
|
rs=init_rs_int(symsize, gfpoly, fcr, prim, nroots, 0);
|
|
|
|
// copy the 'hi there' message to the data vector
|
|
// memcpy(data,hi_there,sizeof(hi_there));
|
|
// memcpy(data,dat4,sizeof(dat4));
|
|
|
|
// printf("data symbols\n");
|
|
// for( i=0; i<12; i++) {
|
|
// revdat[i]=data[11-i];
|
|
// printf("%d ",data[i]);
|
|
// }
|
|
// printf("\n");
|
|
|
|
// encode_rs_int(rs,revdat,parity);
|
|
|
|
//set up the received symbol vector
|
|
// for( i=0; i<63; i++ ) {
|
|
// if( i < 12 ) rxdat[i]=revdat[i];
|
|
// if( i >=12 ) rxdat[i]=parity[i-12];
|
|
// }
|
|
|
|
/*
|
|
int errval, errloc;
|
|
int num_errors=0;
|
|
printf("num_errors = %d\n",num_errors);
|
|
for( i=0; i<num_errors; i++) {
|
|
do {
|
|
errval = rand() & nn;
|
|
} while(errval == 0); //generate random
|
|
|
|
do {
|
|
errloc = rand() % nn;
|
|
} while(errlocs[errloc]!=0);
|
|
|
|
errlocs[errloc] = errval;
|
|
rxdat[errloc] ^= errval;
|
|
}
|
|
*/
|
|
|
|
numera=0;
|
|
printf("channel symbols\n");
|
|
for( i=0; i<63; i++ ) {
|
|
rxdat[i]=mrsym[i];
|
|
printf("%d ",rxdat[i]);
|
|
}
|
|
printf("\n");
|
|
|
|
nerr=decode_rs_int(rs,rxdat,era_pos,numera);
|
|
|
|
printf("nerr %d\n",nerr);
|
|
|
|
printf("decoded data\n");
|
|
for(i=0; i<63; i++) printf("%d ",rxdat[i]);
|
|
printf("\n");
|
|
|
|
exit(0);
|
|
}
|
|
|
|
|