radio_ics_bs.c

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/***************************************************************************
               radio_ics_bs.c  -  SRadio simple bs
                            -------------------
    begin                :  02/10/30
    authors              :  Linus Gasser
    emails               :  [e-mail]
 ***************************************************************************/

/***************************************************************************
                                 Changes
                                 -------
 date - name - description
 02/10/30 - ineiti - begin
 02/11/04 - ineiti - no msgqs...
 03/02/27 - ineiti - simplified to only two slots: BCH and RACH
 03/03/19 - ineiti - added SCH and gain-control
 04/04/08 - ineiti - made an uplink instead of a downlink
 
 **************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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 simple BS
 *
 * Function:
 * - emit sync
 * - listen to RACh
 */

#include "system.h"
#include "sdb.h"
#include "stfa.h"
#include "antenna.h"
#include "std.h"
#include "debugging.h"
#include "../radio_ics.h"
#include "chain.h"
#include "spc.h"


#define DBG_LVL 4
#define DATA_LEN 4096

swr_sdb_id stfa[NO_TX];
struct chain_t *ch_bch, *ch_up[NO_RX];

int looping, delay;


/*
 * Synchronisation chain
 */
void setup_synch( void ){
  swr_sdb_id mod, sch, rrc_send;

  PR( "Setting up BCh on slot 0\n" );
  ch_bch = swr_chain_create(
             NEW_SPC_VAR( "sch_send", sch ),
             NEW_SPC_VAR( "mapper", mod ),
             NEW_SPC( "spread" ),
             NEW_SPC( "chest_send" ),
             NEW_SPC( "synch_send" ),
             NEW_SPC_VAR( "rrc_complex_send", rrc_send ),
             OLD_SPC_IN( stfa[0], 0 ),
             CHAIN_END );
  swr_stfa_notice_sdb( stfa[0], 0, sch );
  swr_sdb_set_config_int( rrc_send, "rrc_index", 2 );

  swr_sdb_set_config_int( sch, "id0", 0x1234 );
  swr_sdb_set_config_int( sch, "uplinks0", 2 );
 

}


void setup_uplink( void ){
  swr_sdb_id despread[NO_RX], join, rrc_rcv[NO_RX],
    chest_rcv[NO_RX], slicer[NO_RX];
  int a;

  PR( "Setting up the uplink\n" );

  // create the other RX antennas
  
  ch_up[0] = swr_chain_create( 
			      OLD_SPC_OUT( stfa[0], 2 ),
			      NEW_SPC_VAR( "rrc_complex_ics_rcv", rrc_rcv[0] ),
			      NEW_SPC_VAR_OUT( "chest_rcv_mimo", chest_rcv[0], 0 ),
			      NEW_SPC_VAR( "despread", despread[0] ),
			      NEW_SPC_VAR( "join", join ),
			      NEW_SPC_VAR( "slicer", slicer[0] ),
			      NEW_SPC( "sink" ),
			      CHAIN_END );
  for ( a=0; a<NO_RX; a++ ){
    if ( a ){
      ch_up[a] = swr_chain_create(
				  OLD_SPC_OUT( stfa[a], 2 ),
				  NEW_SPC_VAR( "rrc_complex_ics_rcv", rrc_rcv[a] ),
				  NEW_SPC_VAR_OUT( "chest_rcv_mimo", chest_rcv[a], a ),
				  NEW_SPC_VAR( "despread", despread[a] ),
				  OLD_SPC_IN( join, a ),
				  CHAIN_END );
    }

    swr_sdb_set_config_int( chest_rcv[a], "calc_taps", 8 );
    swr_sdb_set_config_int( chest_rcv[a], "align", 1 ); 
    swr_sdb_set_config_int( chest_rcv[a], "num_of_antennas", NO_RX );
    swr_sdb_set_config_int( rrc_rcv[a], "channel", a % 2 );
    swr_sdb_set_config_int( despread[a], "sequence00", spread_ortho_8[a] );
  }
}  
  
  



void *start_it( void *arg ) {
  int i;

  looping = 1;

  usleep( 100000 );

  PR( "Init STFA\n" );
  stfa[0] = swr_sdb_instantiate_name( "stfa_ics" );
  for ( i=1; i<NO_TX; i++ ){
    stfa[i] = swr_sdb_instantiate_name( "stfa_ics" );
    swr_sdb_set_config_int( stfa[i-1], "stfa_id", stfa[i] );
  }

  PR( "Initialized STFA\n" );
  swr_sdb_set_config_int( stfa[0], "slots_per_frame", SLOTS );
  swr_sdb_set_config_int( stfa[0], "blocks_per_slot", SLOT_LEN );
  swr_sdb_set_config_int( stfa[0], "slot_send_offset", SLOT_OFFSET );

  swr_sdb_set_config_int( stfa[0], "tx", 1 );
  swr_sdb_set_config_int( stfa[0], "freq", 2380 );
  swr_sdb_set_config_int( stfa[0], "attn_tx", 20 );

  // here we call the two chains we set up before
  setup_synch();
  setup_uplink();
    
  swr_stfa_go( stfa[0] );
  
  while ( looping ) {
    usleep( 1000000 );
  }

  swr_stfa_stop( stfa[0] );
  usleep( 1000000 );

  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) {
  int i;
  MOD_INC_USE_COUNT;
  looping = 1;
  delay = 0;
  ch_bch = NULL;
  for ( i=0; i<NO_RX; i++ ){
    ch_up[i] = NULL;
  }
  if ( swr_thread_init( &start, start_it, NULL ) ) {
    goto rrc_no_thread;
  }
  MOD_DEC_USE_COUNT;
  return 0;

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



void um_module_exit( void ) {
  int i;

  looping = 0;
  swr_thread_free( &start, NULL );

  PR_DBG( 0, "deleting everything\n" );

  swr_chain_destroy( ch_bch );

  PR_DBG( 0, "deleted ch_bch and still alive\n" );

  for ( i=NO_RX-1; i>=0; i-- ){
    PR_DBG(0,"Destroying rx_chain no %i\n",i);
    swr_chain_destroy( ch_up[ i ] );
  }  
  for ( i=NO_TX-1; i>=0; i-- ){
    PR_DBG(0,"Destroying tx_stfa no %i\n",i);
    swr_sdb_destroy( stfa[i] );
  }
}

module_init( um_module_init );
module_exit( um_module_exit );