kopia lustrzana https://github.com/projecthorus/horusdemodlib
97 wiersze
2.5 KiB
C
97 wiersze
2.5 KiB
C
/*---------------------------------------------------------------------------*\
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FILE........: fsk_get_test_bits.c
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AUTHOR......: Brady O'Brien
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DATE CREATED: January 2016
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Generates a pseudorandom sequence of bits for testing of fsk_mod and fsk_demod
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\*---------------------------------------------------------------------------*/
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/*
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Copyright (C) 2016 David Rowe
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All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License version 2.1, as
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published by the Free Software Foundation. This program is
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distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <string.h>
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#include "fsk.h"
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#define TEST_FRAME_SIZE 100 /* arbitrary chice, repeats after this
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many bits, sets frame size for rx
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processing */
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int main(int argc,char *argv[]){
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int bitcnt, framecnt;
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int framesize = TEST_FRAME_SIZE;
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int i;
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FILE *fout;
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uint8_t *bitbuf;
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if(argc < 3){
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fprintf(stderr,"usage: %s OutputBitsOnePerByte numBits [framesize]\n",argv[0]);
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exit(1);
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}
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if (argc == 4){
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framesize = atoi(argv[3]);
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fprintf(stderr, "Using custom frame size of %d bits\n", framesize);
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}
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/* Extract parameters */
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bitcnt = atoi(argv[2]);
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framecnt = bitcnt/framesize;
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if (framecnt == 0) {
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fprintf(stderr,"Need a minimum of %d bits\n", framesize);
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exit(1);
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}
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if(strcmp(argv[1],"-")==0){
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fout = stdout;
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}else{
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fout = fopen(argv[1],"w");
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}
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if(fout==NULL){
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fprintf(stderr,"Couldn't open output file: %s\n", argv[1]);
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goto cleanup;
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}
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/* allocate buffers for processing */
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bitbuf = (uint8_t*)alloca(sizeof(uint8_t)*framesize);
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/* Generate buffer of test frame bits from known seed */
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srand(158324);
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for(i=0; i<framesize; i++){
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bitbuf[i] = rand()&0x1;
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}
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/* Output test frames */
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srand(158324);
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for(i=0; i<framecnt; i++){
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fwrite(bitbuf,sizeof(uint8_t),framesize,fout);
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if(fout == stdout){
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fflush(fout);
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}
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}
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cleanup:
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fclose(fout);
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return 0;
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}
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