radio_ics_bs.c

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/***************************************************************************
               radio_ics_bs.c  -  SRadio simple bs
                            -------------------
    begin                :  04/02/12
    authors              :  PHiLippe Roud
    emails               :  [e-mail]
 ***************************************************************************/

/***************************************************************************
                                 Changes
                                 -------
 date - name - description
 04/02/12 - phil - begin
 04/03/17 - ineiti - chest->circ_ext = 0
 04/03/19 - ineiti - chest->circ_ext = 8, again...
 04/03/27 - ineiti - adjusted PR-message
 04/04/08 - ineiti - adjusted offset_sample_send to 0 again

 
 **************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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
 * - encode LDPC for simple SISO case
 */

#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[ANTENNAS];
struct chain_t *ch_bch, *ch_rach, 
  *ch_supp[ANTENNAS], *ch_down[ANTENNAS], *ch_test;

int looping, delay;

/**
 * Once a frame this function is called. Do here whatever seems accurate...
 */
int do_send_down( int msg, void *data, swr_sdb_id ret_id ) {
  return 0;
}


/*
 * 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 );
#ifdef USER_SPACE
  swr_sdb_set_config_int( rrc_send, "rrc_index", 1 );
#else
  swr_sdb_set_config_int( rrc_send, "rrc_index", 2 );
#endif

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

}

/*
 * LDPC-chain
 */
void setup_ldpc( void ){
  swr_sdb_id rand_u8, encoder, rrc_send, mapper, chest;
  PR( "Setting up an LDPC-chain\n" );
  ch_supp[1] = swr_chain_create(
				NEW_SPC_VAR( "random", rand_u8 ),
				NEW_SPC_VAR( "ldpc_encode_siso_ics", encoder ),
				NEW_SPC_VAR( "mapper", mapper ),
				NEW_SPC_VAR( "chest_send", chest ),
				NEW_SPC_VAR( "rrc_complex_send", rrc_send ),
				OLD_SPC_IN( stfa[0], 2 ),
				CHAIN_END );
  swr_sdb_set_config_int( chest, "circ_ext", 8 );

  swr_stfa_notice_sdb( stfa[0], 2, rrc_send );
#ifdef USER_SPACE
  swr_sdb_set_config_int( rrc_send, "rrc_index", 1 );
#else
  swr_sdb_set_config_int( rrc_send, "rrc_index", 2 );
#endif
  
  swr_sdb_set_config_int( rand_u8, "mode", 1 );
  swr_sdb_set_config_int( rand_u8, "seed", 0x1234 );
  swr_sdb_set_config_int( encoder, "ldpc_code_id", 3 );
  call_module( rand_u8 );
}

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<ANTENNAS; 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 );

  setup_synch();

  setup_ldpc();
    
  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) {

  MOD_INC_USE_COUNT;
  looping = 1;
  delay = 0;
  ch_bch = NULL;
  ch_rach = 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( "Deleting bch and rach\n" );
  swr_chain_destroy( ch_bch );
  swr_chain_destroy( ch_rach );
  PR( "Destroying test\n" );
  swr_chain_destroy( ch_test );
  PR( "Destroying supp and down\n" );
  for ( i=0; i<ANTENNAS; i++ ){
    if ( i > 0 ){
      swr_chain_destroy( ch_supp[ i ] );
      swr_chain_destroy( ch_down[ i ] );
    }
  }
  PR( "Cleaning up STFAs\n" );
  for ( i=0; i<ANTENNAS; i++ ){
    swr_sdb_destroy( stfa[i] );
  }
  PR( "BS stopped\n" );
}


module_init( um_module_init );
module_exit( um_module_exit );