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         press_node(fgGetNode("/environment/pressure-inhg", true)),
  45         temp_node(fgGetNode("/environment/temperature-degc", true)),
  46         wind_dir_node(fgGetNode("/environment/wind-from-heading-deg", true)),
  47         wind_speed_node(fgGetNode("/environment/wind-speed-kt", true)),
  48         p_left_aileron(fgGetNode("surface-positions/left-aileron-pos-norm", true)),
  49         p_right_aileron(fgGetNode("surface-positions/right-aileron-pos-norm", true)),
  50         p_elevator(fgGetNode("surface-positions/elevator-pos-norm", true)),
  51         p_elevator_trim(fgGetNode("surface-positions/elevator_trim-pos-norm", true)),
  52         p_rudder(fgGetNode("surface-positions/rudder-pos-norm", true)),
  53         p_flaps(fgGetNode("surface-positions/flap-pos-norm", true)),
  54         p_flaps_cmd(fgGetNode("/controls/flaps", true)),
  55         p_alphadot(fgGetNode("/fdm/jsbsim/aero/alphadot-radsec", true)),
  56         p_betadot(fgGetNode("/fdm/jsbsim/aero/betadot-radsec", true))
  57 {
  58 }
  59
  60 FGOpenGC::~FGOpenGC() {
  61 }
  62
  63 // open hailing frequencies
  64 bool FGOpenGC::open() {
  65     if ( is_enabled() ) {
  66         SG_LOG( SG_IO, SG_ALERT, "This shouldn't happen, but the channel "
  67                 << "is already in use, ignoring" );
  68         return false;
  69     }
  70
  71     SGIOChannel *io = get_io_channel();
  72
  73     if ( ! io->open( get_direction() ) ) {
  74         SG_LOG( SG_IO, SG_ALERT, "Error opening channel communication layer." );
  75         return false;
  76     }
  77
  78     set_enabled( true );
  79
  80     return true;
  81 }
  82
  83 //static void collect_data( const FGInterface *fdm, ogcFGData *data ) {
  84 void FGOpenGC::collect_data( const FGInterface *fdm, ogcFGData *data ) {
  85
  86     data->version_id = OGC_VERSION;
  87
  88     data->longitude = cur_fdm_state->get_Longitude_deg();
  89     data->latitude = cur_fdm_state->get_Latitude_deg();
  90     data->magvar = globals->get_mag()->get_magvar();
  91
  92     data->pitch = cur_fdm_state->get_Theta_deg();
  93     data->bank = cur_fdm_state->get_Phi_deg();
  94     data->heading = cur_fdm_state->get_Psi_deg();
  95     data->altitude = cur_fdm_state->get_Altitude();
  96     data->altitude_agl = cur_fdm_state->get_Altitude_AGL();
  97     data->v_kcas = cur_fdm_state->get_V_calibrated_kts();
  98     data->vvi = cur_fdm_state->get_Climb_Rate();
  99     data->mach = cur_fdm_state->get_Mach_number();
 100     data->groundspeed = cur_fdm_state->get_V_ground_speed();
 101     data->v_keas = cur_fdm_state->get_V_equiv_kts();
 102
 103     data->phi_dot = cur_fdm_state->get_Phi_dot();
 104     data->theta_dot = cur_fdm_state->get_Theta_dot();
 105     data->psi_dot = cur_fdm_state->get_Psi_dot();
 106
 107     data->alpha = cur_fdm_state->get_Alpha();
 108     data->beta = cur_fdm_state->get_Beta();
 109     data->alpha_dot = p_alphadot->getDoubleValue();
 110     data->beta_dot = p_betadot->getDoubleValue();
 111
 112     //data->rudder_trim = p_Controls->get_rudder_trim();
 113
 114     data->left_aileron = p_left_aileron->getDoubleValue();
 115     data->right_aileron = p_right_aileron->getDoubleValue();
 116     data->elevator = p_elevator->getDoubleValue();
 117     data->elevator_trim = p_elevator_trim->getDoubleValue();
 118     data->rudder = p_rudder->getDoubleValue();
 119     data->flaps = p_flaps->getDoubleValue();
 120     data->flaps_cmd = p_flaps_cmd->getDoubleValue();
 121
 122     data->gear_nose = fgGetDouble("gear/gear[0]/position-norm");
 123     data->gear_nose = fgGetDouble("gear/gear[1]/position-norm");
 124     data->gear_nose = fgGetDouble("gear/gear[2]/position-norm");
 125           data->gear_nose = fgGetDouble("gear/gear[3]/position-norm");
 126           data->gear_nose = fgGetDouble("gear/gear[4]/position-norm");
 127
 128     data->rpm[0] = fgGetDouble("/engines/engine[0]/rpm");
 129     data->rpm[1] = fgGetDouble("/engines/engine[1]/rpm");
 130
 131     data->epr[0] = fgGetDouble("/engines/engine[0]/epr");
 132     data->epr[1] = fgGetDouble("/engines/engine[1]/epr");
 133     data->epr[2] = fgGetDouble("/engines/engine[2]/epr");
 134     data->epr[3] = fgGetDouble("/engines/engine[3]/epr");
 135
 136     data->egt[0] = (fgGetDouble("/engines/engine[0]/egt-degf") - 32.0) * 0.555;
 137     data->egt[1] = (fgGetDouble("/engines/engine[1]/egt-degf") - 32.0) * 0.555;
 138     data->egt[2] = (fgGetDouble("/engines/engine[2]/egt-degf") - 32.0) * 0.555;
 139     data->egt[3] = (fgGetDouble("/engines/engine[3]/egt-degf") - 32.0) * 0.555;
 140
 141     data->n2_turbine[0] = fgGetDouble("/engines/engine[0]/n2");
 142     data->n2_turbine[1] = fgGetDouble("/engines/engine[1]/n2");
 143     data->n2_turbine[2] = fgGetDouble("/engines/engine[2]/n2");
 144     data->n2_turbine[3] = fgGetDouble("/engines/engine[3]/n2");
 145
 146     data->n1_turbine[0] = fgGetDouble("/engines/engine[0]/n1");
 147     data->n1_turbine[1] = fgGetDouble("/engines/engine[1]/n1");
 148     data->n1_turbine[2] = fgGetDouble("/engines/engine[2]/n1");
 149     data->n1_turbine[3] = fgGetDouble("/engines/engine[3]/n1");
 150 // Convert gph to pph for turbine engines
 151     data->fuel_flow[0] = fgGetDouble("/engines/engine[0]/fuel-flow-gph") * 6.5;
 152     data->fuel_flow[1] = fgGetDouble("/engines/engine[1]/fuel-flow-gph") * 6.5;
 153     data->fuel_flow[2] = fgGetDouble("/engines/engine[2]/fuel-flow-gph") * 6.5;
 154     data->fuel_flow[3] = fgGetDouble("/engines/engine[3]/fuel-flow-gph") * 6.5;
 155
 156     data->oil_pressure[0] = fgGetDouble("/engines/engine[0]/oil-pressure-psi");
 157     data->oil_pressure[1] = fgGetDouble("/engines/engine[1]/oil-pressure-psi");
 158     data->oil_pressure[2] = fgGetDouble("/engines/engine[2]/oil-pressure-psi");
 159     data->oil_pressure[3] = fgGetDouble("/engines/engine[3]/oil-pressure-psi");
 160 // Just a few test numbers to test interface and drive EICAS displayss
 161     for (int j=0; j<4; j++) data->oil_pressure[j] = 100.4 + 2.3*j;
 162
 163     data->man_pressure[0] = fgGetDouble("/engines/engine[0]/mp-osi");
 164     data->man_pressure[1] = fgGetDouble("/engines/engine[1]/mp-osi");
 165
 166     data->total_temperature = cur_fdm_state->get_Total_temperature();
 167     data->total_pressure = cur_fdm_state->get_Total_pressure();
 168     data->dynamic_pressure = cur_fdm_state->get_Dynamic_pressure();
 169
 170     data->static_pressure = press_node->getDoubleValue();
 171     data->static_temperature = temp_node->getDoubleValue();
 172     data->wind = wind_speed_node->getDoubleValue();
 173     data->wind_dir =  wind_dir_node->getDoubleValue();
 174 }
 175
 176 static void distribute_data( const ogcFGData *data, FGInterface *chunk ) {
 177     // just a place holder until the CDU is developed
 178
 179 }
 180
 181 // process work for this port
 182 bool FGOpenGC::process() {
 183     SGIOChannel *io = get_io_channel();
 184     int length = sizeof(buf);
 185
 186     if ( get_direction() == SG_IO_OUT ) {
 187         collect_data( cur_fdm_state, &buf );
 188         //collect_data( &buf );
 189         if ( ! io->write( (char *)(& buf), length ) ) {
 190             SG_LOG( SG_IO, SG_ALERT, "Error writing data." );
 191             return false;
 192         }
 193     } else if ( get_direction() == SG_IO_IN ) {
 194         if ( io->get_type() == sgFileType ) {
 195             if ( io->read( (char *)(& buf), length ) == length ) {
 196                 SG_LOG( SG_IO, SG_DEBUG, "Success reading data." );
 197                 distribute_data( &buf, cur_fdm_state );
 198             }
 199         } else {
 200             while ( io->read( (char *)(& buf), length ) == length ) {
 201                 SG_LOG( SG_IO, SG_DEBUG, "Success reading data." );
 202                 distribute_data( &buf, cur_fdm_state );
 203             }
 204         }
 205     }
 206
 207     return true;
 208 }
 209
 210
 211 // close the channel
 212 bool FGOpenGC::close() {
 213     SGIOChannel *io = get_io_channel();
 214
 215     set_enabled( false );
 216
 217     if ( ! io->close() ) {
 218         return false;
 219     }
 220
 221     return true;
 222 }
 223