src/Network/opengc.cxx

   1 // opengc.cxx - Network interface program to send data to display processor over LAN
   2 //
   3 // Created by:  J. Wojnaroski  -- castle@mminternet.com
   4 // Date:                21 Nov 2001
   5 //
   6 // Extended from original network code developed by C. Olson
   7 //
   8 //  Modified 12/02/01 - Update engine structure for multi-engine models
   9 //                        - Added data preamble to id msg types
  10 //
  11 //  Modified 01/23/02 - Converted portions of the Engine and Gear accesssors to properties
  12 //                          - Removed data from navigation functions. OpenGC provides own nav functions
  13 //
  14 // This program is free software; you can redistribute it and/or
  15 // modify it under the terms of the GNU General Public License as
  16 // published by the Free Software Foundation; either version 2 of the
  17 // License, or (at your option) any later version.
  18 //
  19 // This program is distributed in the hope that it will be useful, but
  20 // WITHOUT ANY WARRANTY; without even the implied warranty of
  21 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  22 // General Public License for more details.
  23 //
  24 // You should have received a copy of the GNU General Public License
  25 // along with this program; if not, write to the Free Software
  26 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27 //
  28
  29 #include <simgear/debug/logstream.hxx>
  30 #include <simgear/io/iochannel.hxx>
  31
  32 #include <vector>
  33
  34 #include "opengc.hxx"
  35 #include <FDM/flight.hxx>
  36 #include <Main/globals.hxx>
  37 #include <Cockpit/radiostack.hxx>
  38 #include <Controls/controls.hxx>
  39 #include <Main/fg_props.hxx>
  40
  41 SG_USING_STD(vector);
  42
  43 FGOpenGC::FGOpenGC() {
  44 }
  45
  46 FGOpenGC::~FGOpenGC() {
  47 }
  48
  49 // open hailing frequencies
  50 bool FGOpenGC::open() {
  51     if ( is_enabled() ) {
  52         SG_LOG( SG_IO, SG_ALERT, "This shouldn't happen, but the channel "
  53                 << "is already in use, ignoring" );
  54         return false;
  55     }
  56
  57     SGIOChannel *io = get_io_channel();
  58
  59     if ( ! io->open( get_direction() ) ) {
  60         SG_LOG( SG_IO, SG_ALERT, "Error opening channel communication layer." );
  61         return false;
  62     }
  63
  64     set_enabled( true );
  65
  66     return true;
  67 }
  68
  69
  70 static void collect_data( const FGInterface *fdm, ogcFGData *data ) {
  71
  72     data->version_id = 0x0012;
  73
  74     data->longitude = cur_fdm_state->get_Longitude_deg();
  75     data->latitude = cur_fdm_state->get_Latitude_deg();
  76     data->magvar = globals->get_mag()->get_magvar();
  77
  78     data->pitch = cur_fdm_state->get_Theta_deg();
  79     data->bank = cur_fdm_state->get_Phi_deg();
  80     data->heading = cur_fdm_state->get_Psi_deg();
  81     data->altitude = cur_fdm_state->get_Altitude();
  82     data->altitude_agl = cur_fdm_state->get_Altitude_AGL();
  83     data->v_kcas = cur_fdm_state->get_V_calibrated_kts();
  84     data->vvi = cur_fdm_state->get_Climb_Rate();
  85     data->mach = cur_fdm_state->get_Mach_number();
  86     data->groundspeed = cur_fdm_state->get_V_ground_speed();
  87     data->v_tas = cur_fdm_state->get_V_equiv_kts();
  88
  89     data->phi_dot = cur_fdm_state->get_Phi_dot();
  90     data->theta_dot = cur_fdm_state->get_Theta_dot();
  91     data->psi_dot = cur_fdm_state->get_Psi_dot();
  92
  93     data->alpha = cur_fdm_state->get_Alpha();
  94     data->beta = cur_fdm_state->get_Beta();
  95     data->alpha_dot = cur_fdm_state->get_Alpha_dot();
  96     data->beta_dot = cur_fdm_state->get_Beta_dot();
  97
  98
  99     data->aileron = globals->get_controls()->get_aileron();
 100     //data->aileron_trim = p_Controls->get_aileron_trim();
 101     data->elevator = globals->get_controls()->get_elevator();
 102     data->elevator_trim = globals->get_controls()->get_elevator_trim();
 103     data->rudder = globals->get_controls()->get_rudder();
 104     //data->rudder_trim = p_Controls->get_rudder_trim();
 105     //data->flaps = fgGetDouble("/controls/flaps");
 106     data->flaps = globals->get_controls()->get_flaps();
 107
 108     //data->gear_nose = p_gear[0]->GetPosition();
 109     //data->gear_left = p_gear[1]->GetPosition();
 110     //data->gear_right = p_gear[2]->GetPosition();
 111
 112     data->rpm[0] = fgGetDouble("/engines/engine[0]/rpm");
 113     data->rpm[1] = fgGetDouble("/engines/engine[1]/rpm");
 114
 115     data->epr[0] = fgGetDouble("/engines/engine[0]/epr");
 116     data->epr[1] = fgGetDouble("/engines/engine[1]/epr");
 117     data->epr[2] = fgGetDouble("/engines/engine[2]/epr");
 118     data->epr[3] = fgGetDouble("/engines/engine[3]/epr");
 119
 120     data->egt[0] = fgGetDouble("/engines/engine[0]/egt-degf");
 121     data->egt[1] = fgGetDouble("/engines/engine[1]/egt-degf");
 122     data->egt[2] = fgGetDouble("/engines/engine[2]/egt-degf");
 123     data->egt[3] = fgGetDouble("/engines/engine[3]/egt-degf");
 124
 125     data->n2_turbine[0] = fgGetDouble("/engines/engine[0]/n2");
 126     data->n2_turbine[1] = fgGetDouble("/engines/engine[1]/n2");
 127     data->n2_turbine[2] = fgGetDouble("/engines/engine[2]/n2");
 128     data->n2_turbine[3] = fgGetDouble("/engines/engine[3]/n2");
 129
 130     data->n1_turbine[0] = fgGetDouble("/engines/engine[0]/n1");
 131     data->n1_turbine[1] = fgGetDouble("/engines/engine[1]/n1");
 132     data->n1_turbine[2] = fgGetDouble("/engines/engine[2]/n1");
 133     data->n1_turbine[3] = fgGetDouble("/engines/engine[3]/n1");
 134
 135     data->fuel_flow[0] = fgGetDouble("/engines/engine[0]/fuel-flow-gph");
 136     data->fuel_flow[1] = fgGetDouble("/engines/engine[1]/fuel-flow-gph");
 137     data->fuel_flow[1] = fgGetDouble("/engines/engine[1]/fuel-flow-gph");
 138     data->fuel_flow[2] = fgGetDouble("/engines/engine[2]/fuel-flow-gph");
 139
 140     data->oil_pressure[0] = fgGetDouble("/engines/engine[0]/oil-pressure-psi");
 141     data->oil_pressure[1] = fgGetDouble("/engines/engine[1]/oil-pressure-psi");
 142     data->oil_pressure[2] = fgGetDouble("/engines/engine[2]/oil-pressure-psi");
 143     data->oil_pressure[3] = fgGetDouble("/engines/engine[3]/oil-pressure-psi");
 144
 145     data->man_pressure[0] = fgGetDouble("/engines/engine[0]/mp-osi");
 146     data->man_pressure[1] = fgGetDouble("/engines/engine[1]/mp-osi");
 147
 148     data->static_temperature = cur_fdm_state->get_Static_temperature();
 149     data->total_temperature = cur_fdm_state->get_Total_temperature();
 150     data->static_pressure = cur_fdm_state->get_Static_pressure();
 151     data->total_pressure = cur_fdm_state->get_Total_pressure();
 152     data->dynamic_pressure = cur_fdm_state->get_Dynamic_pressure();
 153 }
 154
 155 static void distribute_data( const ogcFGData *data, FGInterface *chunk ) {
 156     // just a place holder until the CDU is developed
 157
 158 }
 159
 160 // process work for this port
 161 bool FGOpenGC::process() {
 162     SGIOChannel *io = get_io_channel();
 163     int length = sizeof(buf);
 164
 165     if ( get_direction() == SG_IO_OUT ) {
 166         collect_data( cur_fdm_state, &buf );
 167         //collect_data( &buf );
 168         if ( ! io->write( (char *)(& buf), length ) ) {
 169             SG_LOG( SG_IO, SG_ALERT, "Error writing data." );
 170             return false;
 171         }
 172     } else if ( get_direction() == SG_IO_IN ) {
 173         if ( io->get_type() == sgFileType ) {
 174             if ( io->read( (char *)(& buf), length ) == length ) {
 175                 SG_LOG( SG_IO, SG_DEBUG, "Success reading data." );
 176                 distribute_data( &buf, cur_fdm_state );
 177             }
 178         } else {
 179             while ( io->read( (char *)(& buf), length ) == length ) {
 180                 SG_LOG( SG_IO, SG_DEBUG, "Success reading data." );
 181                 distribute_data( &buf, cur_fdm_state );
 182             }
 183         }
 184     }
 185
 186     return true;
 187 }
 188
 189
 190 // close the channel
 191 bool FGOpenGC::close() {
 192     SGIOChannel *io = get_io_channel();
 193
 194     set_enabled( false );
 195
 196     if ( ! io->close() ) {
 197         return false;
 198     }
 199
 200     return true;
 201 }
 202