test_synch_bs.c

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

/***************************************************************************
               synch_test_bs.c  -  SRadio testing of synchronisation - BS
                            -------------------
    begin                :  2002
    authors              :  Linus Gasser
    emails               :  [e-mail]
 ***************************************************************************/

/***************************************************************************
                                 Changes
                                 -------
 date - name - description
 02-10-16 - ineiti - begin
 02-12-18 - ineiti - split up in MS and BS part
 
 **************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/


/**
 * Make a small little chain with the synch
 */

#include "system.h"
#include "spc.h"
#include "antenna.h"
#include "std.h"
#include "stfa.h"

#define ANTENNA 0
#define DBG_LVL 4
swr_sdb_id synch_send;
struct chain_t *test;

#define DESYNCH 1
#define MAX_SYNCH 9

int count, size;
SYMBOL_MMX *buf;


/*
 * The main thread, where the chain is set up and either
 * a synchronisation-signal is sent, or it waits for one.
 */
void *start_it( void *arg ) {
  swr_sdb_id stfa, rand;

  test = swr_chain_create( NEW_SPC_VAR( "random", rand ),
                           NEW_SPC( "mapper" ),
                           NEW_SPC_VAR( "synch_send", synch_send ),
                           NEW_SPC( "rrc" ),
                           NEW_SPC_VAR( "stfa", stfa ),
                           CHAIN_END );

  PR( "Getting chain synch_send->rrc->stfa\n" );

  PR( "Setting up STFA\n" );
  swr_stfa_notice_sdb( stfa, 0, rand );
  size = swr_sdb_get_struct( synch_send )->port_in[0].size;
  buf = swr_sdb_get_struct( synch_send )->port_in[0].data;

  // And send some slots...
  PR( "Send some slots to %p with size %i\n", buf, size );
  PR( "Setting gains and starting\n" );
  count = 0;
  swr_ant_set_gains( ANTENNA, 0, 0 );
  swr_stfa_go( stfa );

  while ( count < 8192 ) {
    usleep( 500000 );
  }

  PR_DBG( 4, "Stopping the STFA\n" );
  swr_stfa_stop( stfa );

  return 0;
}

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) {

  if ( swr_thread_init( &start, start_it, NULL ) ) {
    goto rrc_no_thread;
  }
  return 0;

rrc_no_thread:
  PR_DBG( 0, "Couldn't init thread\n" );
  return -1;
}

void um_module_exit( void ) {

  swr_thread_free( &start, NULL );
  PR_DBG( 0, "deleting synch_send and stfa\n" );
  swr_memory_show();
  swr_chain_destroy( test );
}


module_init( um_module_init );
module_exit( um_module_exit );

EXPORT_SYMBOL(start_it);