test_spread.c

This a framework to test new ideas in transmission technology. Actual development is a LDPC-coder in

/***************************************************************************
              spread_test.c  -  Module for testing the spreading
                            -------------------
    begin                :  2003
    authors              :  ineiti
    emails               :  [e-mail]
 ***************************************************************************/

/***************************************************************************
                                 Changes
                                 -------
 date - name - description
 03/01/29 - ineiti - start
 04/03/03 - ineiti - added a small description
 
 **************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/


char desc[] =
"Description:\n"
"Spreading is either a simple repetition-code, or can be used\n"
"for multi-user detection. Here we do a simple chain with one user\n"
"and output the test-phrase if everything goes well.\n\n";

#include "spc.h"
#include "std.h"

#define DBG_LVL 0


struct chain_t *test_chain;

void *start_it( void *arg ) {
  swr_sdb_id rand, spread, despread, sink, mafi, block;

  test_chain = swr_chain_create(
                 NEW_SPC_VAR( "rndstr", rand ),
                 NEW_SPC( "mapper" ),
                 NEW_SPC_VAR( "spread", spread ),
                 NEW_SPC( "midamble" ),
                 NEW_SPC( "rrc" ),
                 NEW_SPC_VAR( "block", block ),
                 NEW_SPC_VAR( "matched_filter", mafi ),
                 NEW_SPC_VAR( "despread", despread ),
                 NEW_SPC( "slicer" ),
                 NEW_SPC_VAR( "sink", sink ),
                 CHAIN_END);

  swr_sdb_set_config_int( block, "size", 20000 );
  swr_sdb_set_config_int( spread, "factor", 8 );
  swr_sdb_set_config_int( despread, "factor00", 8 );
  swr_sdb_set_config_int( sink, "flag", 1 );
  swr_sdb_send_msg( rand, SUBS_MSG_USER, NULL, -1 );
  PR( "Done\n" );
  usleep( 2000000 );
  return 0;
}

swr_spc_id_t spm_id;

struct thread start;
/**
 * This function is called upon "insmod" and is used to register the
 * different parts of the module to the SPM.
 */
int um_module_init(void) {

  PR_CL( desc );
  test_chain = NULL;
  if ( swr_thread_init( &start, start_it, NULL ) < 0 )
    goto first_no_stack;
  return 0;

first_no_stack:
  PR_DBG( 0, "Couldn't allocate stack\n" );
  return -1;
}

void um_module_exit( void ) {

  swr_thread_free( &start, NULL );
  swr_chain_destroy( test_chain );

}


module_init( um_module_init );
module_exit( um_module_exit );