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 //  Modified 03/05/03 - Modified to reduce need to search property tree for each node per frame
  15 //
  16 // This program is free software; you can redistribute it and/or
  17 // modify it under the terms of the GNU General Public License as
  18 // published by the Free Software Foundation; either version 2 of the
  19 // License, or (at your option) any later version.
  20 //
  21 // This program is distributed in the hope that it will be useful, but
  22 // WITHOUT ANY WARRANTY; without even the implied warranty of
  23 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  24 // General Public License for more details.
  25 //
  26 // You should have received a copy of the GNU General Public License
  27 // along with this program; if not, write to the Free Software
  28 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  29 //
  30
  31 #include <simgear/debug/logstream.hxx>
  32 #include <simgear/io/iochannel.hxx>
  33
  34 #include <vector>
  35
  36 #include "opengc.hxx"
  37 #include <FDM/flight.hxx>
  38 #include <Main/globals.hxx>
  39 #include <Controls/controls.hxx>
  40 #include <Main/fg_props.hxx>
  41
  42 SG_USING_STD(vector);
  43
  44 FGOpenGC::FGOpenGC() :
  45         press_node(fgGetNode("/environment/pressure-inhg", true)),
  46         temp_node(fgGetNode("/environment/temperature-degc", true)),
  47         wind_dir_node(fgGetNode("/environment/wind-from-heading-deg", true)),
  48         wind_speed_node(fgGetNode("/environment/wind-speed-kt", true)),
  49         mag_var_node(fgGetNode("/environment/magnetic-variation-deg", true)),
  50         p_latitude(fgGetNode("/position/latitude-deg", true)),
  51         p_longitude(fgGetNode("/position/longitude-deg", true)),
  52         p_alt_node(fgGetNode("/position/altitude-ft", true)),
  53         p_altitude(fgGetNode("/steam/altitude-ft", true)),
  54         p_altitude_agl(fgGetNode("/position/altitude-agl-ft", true)),
  55         egt0_node(fgGetNode("/engines/engine/egt-degf", true)),
  56         egt1_node(fgGetNode("/engines/engine[1]/egt-degf", true)),
  57         egt2_node(fgGetNode("/engines/engine[2]/egt-degf", true)),
  58         egt3_node(fgGetNode("/engines/engine[3]/egt-degf", true)),
  59         p_left_aileron(fgGetNode("surface-positions/left-aileron-pos-norm", true)),
  60         p_right_aileron(fgGetNode("surface-positions/right-aileron-pos-norm", true)),
  61         p_elevator(fgGetNode("surface-positions/elevator-pos-norm", true)),
  62         p_elevator_trim(fgGetNode("surface-positions/elevator_trim-pos-norm", true)),
  63         p_rudder(fgGetNode("surface-positions/rudder-pos-norm", true)),
  64         p_flaps(fgGetNode("surface-positions/flap-pos-norm", true)),
  65         p_flaps_cmd(fgGetNode("/controls/flaps", true)),
  66         p_alphadot(fgGetNode("/fdm/jsbsim/aero/alphadot-radsec", true)),
  67         p_betadot(fgGetNode("/fdm/jsbsim/aero/betadot-radsec", true))
  68
  69 {
  70 }
  71
  72 FGOpenGC::~FGOpenGC() {
  73 }
  74
  75 // open hailing frequencies
  76 bool FGOpenGC::open() {
  77     if ( is_enabled() ) {
  78         SG_LOG( SG_IO, SG_ALERT, "This shouldn't happen, but the channel "
  79                 << "is already in use, ignoring" );
  80         return false;
  81     }
  82
  83     SGIOChannel *io = get_io_channel();
  84
  85     if ( ! io->open( get_direction() ) ) {
  86         SG_LOG( SG_IO, SG_ALERT, "Error opening channel communication layer." );
  87         return false;
  88     }
  89
  90     set_enabled( true );
  91
  92     return true;
  93 }
  94
  95 //static void collect_data( const FGInterface *fdm, ogcFGData *data ) {
  96 void FGOpenGC::collect_data( const FGInterface *fdm, ogcFGData *data ) {
  97
  98     data->version_id = OGC_VERSION;
  99
 100     data->longitude = p_longitude->getDoubleValue();
 101     data->latitude = p_latitude->getDoubleValue();
 102     data->elevation = p_alt_node->getDoubleValue();
 103     data->magvar = mag_var_node->getDoubleValue();
 104
 105     //cout << "ID: " << OGC_VERSION  << " Lon: " << data->longitude << " Lat: " << data->latitude << endl;
 106
 107     data->pitch = cur_fdm_state->get_Theta_deg();
 108     data->bank = cur_fdm_state->get_Phi_deg();
 109     data->heading = cur_fdm_state->get_Psi_deg();
 110     data->altitude = p_altitude->getDoubleValue();
 111     data->altitude_agl = p_altitude_agl->getDoubleValue();
 112     data->v_kcas = cur_fdm_state->get_V_calibrated_kts();
 113     data->vvi = cur_fdm_state->get_Climb_Rate();
 114     data->mach = cur_fdm_state->get_Mach_number();
 115     data->groundspeed = cur_fdm_state->get_V_ground_speed();
 116     data->v_keas = cur_fdm_state->get_V_equiv_kts();
 117
 118     data->phi_dot = cur_fdm_state->get_Phi_dot();
 119     data->theta_dot = cur_fdm_state->get_Theta_dot();
 120     data->psi_dot = cur_fdm_state->get_Psi_dot();
 121
 122     data->alpha = cur_fdm_state->get_Alpha();
 123     data->beta = cur_fdm_state->get_Beta();
 124     data->alpha_dot = p_alphadot->getDoubleValue();
 125     data->beta_dot = p_betadot->getDoubleValue();
 126
 127     //data->rudder_trim = p_Controls->get_rudder_trim();
 128
 129     data->left_aileron = p_left_aileron->getDoubleValue();
 130     data->right_aileron = p_right_aileron->getDoubleValue();
 131     data->elevator = p_elevator->getDoubleValue();
 132     data->elevator_trim = p_elevator_trim->getDoubleValue();
 133     data->rudder = p_rudder->getDoubleValue();
 134     data->flaps = p_flaps->getDoubleValue();
 135     data->flaps_cmd = p_flaps_cmd->getDoubleValue();
 136
 137     data->gear_nose = fgGetDouble("gear/gear[0]/position-norm");
 138     data->gear_left = fgGetDouble("gear/gear[1]/position-norm");
 139     data->gear_right = fgGetDouble("gear/gear[2]/position-norm");
 140           data->gear_left_rear = fgGetDouble("gear/gear[3]/position-norm");
 141           data->gear_right_rear = fgGetDouble("gear/gear[4]/position-norm");
 142
 143     data->rpm[0] = fgGetDouble("/engines/engine[0]/rpm");
 144     data->rpm[1] = fgGetDouble("/engines/engine[1]/rpm");
 145
 146     data->epr[0] = fgGetDouble("/engines/engine[0]/epr");
 147     data->epr[1] = fgGetDouble("/engines/engine[1]/epr");
 148     data->epr[2] = fgGetDouble("/engines/engine[2]/epr");
 149     data->epr[3] = fgGetDouble("/engines/engine[3]/epr");
 150
 151     data->egt[0] = (egt0_node->getDoubleValue() - 32.0) * 0.555;
 152     data->egt[1] = (egt1_node->getDoubleValue() - 32.0) * 0.555;
 153     data->egt[2] = (egt2_node->getDoubleValue() - 32.0) * 0.555;
 154     data->egt[3] = (egt3_node->getDoubleValue() - 32.0) * 0.555;
 155
 156     data->n2_turbine[0] = fgGetDouble("/engines/engine[0]/n2");
 157     data->n2_turbine[1] = fgGetDouble("/engines/engine[1]/n2");
 158     data->n2_turbine[2] = fgGetDouble("/engines/engine[2]/n2");
 159     data->n2_turbine[3] = fgGetDouble("/engines/engine[3]/n2");
 160
 161     data->n1_turbine[0] = fgGetDouble("/engines/engine[0]/n1");
 162     data->n1_turbine[1] = fgGetDouble("/engines/engine[1]/n1");
 163     data->n1_turbine[2] = fgGetDouble("/engines/engine[2]/n1");
 164     data->n1_turbine[3] = fgGetDouble("/engines/engine[3]/n1");
 165 // the units for turbine engines is lbs/hr divide by 6.5 to convert to gph if piston type
 166     data->fuel_flow[0] = fgGetDouble("/engines/engine[0]/fuel-flow-gph");
 167     data->fuel_flow[1] = fgGetDouble("/engines/engine[1]/fuel-flow-gph");
 168     data->fuel_flow[2] = fgGetDouble("/engines/engine[2]/fuel-flow-gph");
 169     data->fuel_flow[3] = fgGetDouble("/engines/engine[3]/fuel-flow-gph");
 170
 171     data->oil_pressure[0] = fgGetDouble("/engines/engine[0]/oil-pressure-psi");
 172     data->oil_pressure[1] = fgGetDouble("/engines/engine[1]/oil-pressure-psi");
 173     data->oil_pressure[2] = fgGetDouble("/engines/engine[2]/oil-pressure-psi");
 174     data->oil_pressure[3] = fgGetDouble("/engines/engine[3]/oil-pressure-psi");
 175
 176     data->oil_temp[0] = fgGetDouble("/engines/engine[0]/OilTemp_degK");
 177     data->oil_temp[1] = fgGetDouble("/engines/engine[1]/OilTemp_degK");
 178     data->oil_temp[2] = fgGetDouble("/engines/engine[2]/OilTemp_degK");
 179     data->oil_temp[3] = fgGetDouble("/engines/engine[3]/OilTemp_degK");
 180     //  dummy value to fill data packet
 181     data->oil_quantity[0] = fgGetDouble("/engines/engine[0]/oil-quantity");
 182     data->oil_quantity[1] = fgGetDouble("/engines/engine[1]/oil-quantity");
 183     data->oil_quantity[2] = fgGetDouble("/engines/engine[2]/oil-quantity");
 184     data->oil_quantity[3] = fgGetDouble("/engines/engine[3]/oil-quantity");
 185     data->oil_quantity[0] = 40.3; data->oil_quantity[1] = 44.6;
 186
 187     data->hyd_pressure[0] = fgGetDouble("/engines/engine[0]/hyd-pressure-psi");
 188     data->hyd_pressure[1] = fgGetDouble("/engines/engine[1]/hyd-pressure-psi");
 189     data->hyd_pressure[2] = fgGetDouble("/engines/engine[2]/hyd-pressure-psi");
 190     data->hyd_pressure[3] = fgGetDouble("/engines/engine[3]/hyd-pressure-psi");
 191     data->hyd_pressure[0] = 3215.0; data->hyd_pressure[1] = 3756.0;
 192
 193     data->man_pressure[0] = fgGetDouble("/engines/engine[0]/mp-osi");
 194     data->man_pressure[1] = fgGetDouble("/engines/engine[1]/mp-osi");
 195
 196     data->tank[0] = fgGetDouble("/consumables/fuel/tank[2]/level-gal_us") * 6.6;
 197     data->tank[1] = fgGetDouble("/consumables/fuel/tank/level-gal_us") * 6.6;
 198     data->tank[2] = fgGetDouble("/consumables/fuel/tank[1]/level-gal_us") * 6.6;
 199     //data->tank[0] = 3000.0;
 200     //data->tank[1] = 9800.0;
 201     //data->tank[2] = 9800.0;
 202
 203     data->total_temperature = cur_fdm_state->get_Total_temperature();
 204     data->total_pressure = cur_fdm_state->get_Total_pressure();
 205     data->dynamic_pressure = cur_fdm_state->get_Dynamic_pressure();
 206
 207     data->static_pressure = press_node->getDoubleValue();
 208     data->static_temperature = temp_node->getDoubleValue();
 209     data->wind = wind_speed_node->getDoubleValue();
 210     data->wind_dir =  wind_dir_node->getDoubleValue();
 211 }
 212
 213 static void distribute_data( const ogcFGData *data, FGInterface *chunk ) {
 214     // just a place holder until the CDU is developed
 215
 216 }
 217
 218 // process work for this port
 219 bool FGOpenGC::process() {
 220     SGIOChannel *io = get_io_channel();
 221     int length = sizeof(buf);
 222
 223     if ( get_direction() == SG_IO_OUT ) {
 224         collect_data( cur_fdm_state, &buf );
 225         //collect_data( &buf );
 226         if ( ! io->write( (char *)(& buf), length ) ) {
 227             SG_LOG( SG_IO, SG_WARN, "Error writing data." );
 228             return false;
 229         }
 230     } else if ( get_direction() == SG_IO_IN ) {
 231         if ( io->get_type() == sgFileType ) {
 232             if ( io->read( (char *)(& buf), length ) == length ) {
 233                 SG_LOG( SG_IO, SG_DEBUG, "Success reading data." );
 234                 distribute_data( &buf, cur_fdm_state );
 235             }
 236         } else {
 237             while ( io->read( (char *)(& buf), length ) == length ) {
 238                 SG_LOG( SG_IO, SG_DEBUG, "Success reading data." );
 239                 distribute_data( &buf, cur_fdm_state );
 240             }
 241         }
 242     }
 243
 244     return true;
 245 }
 246
 247
 248 // close the channel
 249 bool FGOpenGC::close() {
 250     SGIOChannel *io = get_io_channel();
 251
 252     set_enabled( false );
 253
 254     if ( ! io->close() ) {
 255         return false;
 256     }
 257
 258     return true;
 259 }
 260