554 lines
17 KiB
C++
554 lines
17 KiB
C++
// kr-87.cxx -- class to impliment the King KR 87 Digital ADF
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//
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// Written by Curtis Olson, started April 2002.
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//
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// Copyright (C) 2002 Curtis L. Olson - curt@flightgear.org
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// $Id$
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdio.h> // snprintf
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#include <simgear/compiler.h>
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#include <simgear/math/sg_random.h>
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#include <Aircraft/aircraft.hxx>
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#include <Navaids/navlist.hxx>
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#include "kr_87.hxx"
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#include <string>
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SG_USING_STD(string);
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static int play_count = 0;
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static time_t last_time = 0;
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/**
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* Boy, this is ugly! Make the VOR range vary by altitude difference.
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*/
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static double kludgeRange ( double stationElev, double aircraftElev,
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double nominalRange)
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{
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// Assume that the nominal range (usually
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// 50nm) applies at a 5,000 ft difference.
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// Just a wild guess!
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double factor = (aircraftElev - stationElev)*SG_METER_TO_FEET / 5000.0;
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double range = fabs(nominalRange * factor);
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// Clamp the range to keep it sane; for
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// now, never less than 50% or more than
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// 500% of nominal range.
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if (range < nominalRange/2.0) {
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range = nominalRange/2.0;
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} else if (range > nominalRange*5.0) {
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range = nominalRange*5.0;
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}
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return range;
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}
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// Constructor
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FGKR_87::FGKR_87() :
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lon_node(fgGetNode("/position/longitude-deg", true)),
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lat_node(fgGetNode("/position/latitude-deg", true)),
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alt_node(fgGetNode("/position/altitude-ft", true)),
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bus_power(fgGetNode("/systems/electrical/outputs/adf", true)),
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serviceable(fgGetNode("/instrumentation/adf/serviceable", true)),
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need_update(true),
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valid(false),
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inrange(false),
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dist(0.0),
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heading(0.0),
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goal_needle_deg(0.0),
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et_flash_time(0.0),
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ant_mode(0),
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stby_mode(0),
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timer_mode(0),
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count_mode(0),
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rotation(0),
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power_btn(true),
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audio_btn(true),
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vol_btn(0.5),
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adf_btn(true),
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bfo_btn(false),
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frq_btn(false),
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last_frq_btn(false),
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flt_et_btn(false),
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last_flt_et_btn(false),
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set_rst_btn(false),
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last_set_rst_btn(false),
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freq(0.0),
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stby_freq(0.0),
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needle_deg(0.0),
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flight_timer(0.0),
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elapsed_timer(0.0),
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tmp_timer(0.0)
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{
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}
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// Destructor
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FGKR_87::~FGKR_87() {
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}
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void FGKR_87::init () {
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serviceable->setBoolValue( true );
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morse.init();
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}
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void FGKR_87::bind () {
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// internal values
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fgTie("/radios/kr-87/internal/valid", this, &FGKR_87::get_valid);
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fgTie("/radios/kr-87/internal/inrange", this, &FGKR_87::get_inrange);
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fgTie("/radios/kr-87/internal/dist", this, &FGKR_87::get_dist);
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fgTie("/radios/kr-87/internal/heading", this, &FGKR_87::get_heading);
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// modes
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fgTie("/radios/kr-87/modes/ant", this,
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&FGKR_87::get_ant_mode);
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fgTie("/radios/kr-87/modes/stby", this,
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&FGKR_87::get_stby_mode);
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fgTie("/radios/kr-87/modes/timer", this,
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&FGKR_87::get_timer_mode);
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fgTie("/radios/kr-87/modes/count", this,
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&FGKR_87::get_count_mode);
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// input and buttons
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fgTie("/radios/kr-87/inputs/rotation-deg", this,
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&FGKR_87::get_rotation, &FGKR_87::set_rotation);
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fgSetArchivable("/radios/kr-87/inputs/rotation-deg");
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fgTie("/radios/kr-87/inputs/power-btn", this,
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&FGKR_87::get_power_btn,
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&FGKR_87::set_power_btn);
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fgSetArchivable("/radios/kr-87/inputs/power-btn");
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fgTie("/radios/kr-87/inputs/audio-btn", this,
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&FGKR_87::get_audio_btn,
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&FGKR_87::set_audio_btn);
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fgSetArchivable("/radios/kr-87/inputs/audio-btn");
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fgTie("/radios/kr-87/inputs/volume", this,
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&FGKR_87::get_vol_btn,
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&FGKR_87::set_vol_btn);
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fgSetArchivable("/radios/kr-87/inputs/volume");
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fgTie("/radios/kr-87/inputs/adf-btn", this,
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&FGKR_87::get_adf_btn,
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&FGKR_87::set_adf_btn);
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fgTie("/radios/kr-87/inputs/bfo-btn", this,
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&FGKR_87::get_bfo_btn,
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&FGKR_87::set_bfo_btn);
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fgTie("/radios/kr-87/inputs/frq-btn", this,
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&FGKR_87::get_frq_btn,
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&FGKR_87::set_frq_btn);
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fgTie("/radios/kr-87/inputs/flt-et-btn", this,
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&FGKR_87::get_flt_et_btn,
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&FGKR_87::set_flt_et_btn);
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fgTie("/radios/kr-87/inputs/set-rst-btn", this,
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&FGKR_87::get_set_rst_btn,
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&FGKR_87::set_set_rst_btn);
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// outputs
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fgTie("/radios/kr-87/outputs/selected-khz", this,
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&FGKR_87::get_freq, &FGKR_87::set_freq);
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fgSetArchivable("/radios/kr-87/outputs/selected-khz");
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fgTie("/radios/kr-87/outputs/standby-khz", this,
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&FGKR_87::get_stby_freq, &FGKR_87::set_stby_freq);
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fgSetArchivable("/radios/kr-87/outputs/standby-khz");
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fgTie("/radios/kr-87/outputs/needle-deg", this,
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&FGKR_87::get_needle_deg);
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fgTie("/radios/kr-87/outputs/flight-timer", this, &FGKR_87::get_flight_timer);
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fgTie("/radios/kr-87/outputs/elapsed-timer", this,
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&FGKR_87::get_elapsed_timer,
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&FGKR_87::set_elapsed_timer);
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// annunciators
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fgTie("/radios/kr-87/annunciators/ant", this, &FGKR_87::get_ant_ann );
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fgTie("/radios/kr-87/annunciators/adf", this, &FGKR_87::get_adf_ann );
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fgTie("/radios/kr-87/annunciators/bfo", this, &FGKR_87::get_bfo_ann );
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fgTie("/radios/kr-87/annunciators/frq", this, &FGKR_87::get_frq_ann );
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fgTie("/radios/kr-87/annunciators/flt", this, &FGKR_87::get_flt_ann );
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fgTie("/radios/kr-87/annunciators/et", this, &FGKR_87::get_et_ann );
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}
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void FGKR_87::unbind () {
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// internal values
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fgUntie("/radios/kr-87/internal/valid");
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fgUntie("/radios/kr-87/internal/inrange");
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fgUntie("/radios/kr-87/internal/dist");
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fgUntie("/radios/kr-87/internal/heading");
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// modes
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fgUntie("/radios/kr-87/modes/ant");
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fgUntie("/radios/kr-87/modes/stby");
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fgUntie("/radios/kr-87/modes/timer");
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fgUntie("/radios/kr-87/modes/count");
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// input and buttons
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fgUntie("/radios/kr-87/inputs/rotation-deg");
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fgUntie("/radios/kr-87/inputs/power-btn");
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fgUntie("/radios/kr-87/inputs/volume");
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fgUntie("/radios/kr-87/inputs/adf-btn");
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fgUntie("/radios/kr-87/inputs/bfo-btn");
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fgUntie("/radios/kr-87/inputs/frq-btn");
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fgUntie("/radios/kr-87/inputs/flt-et-btn");
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fgUntie("/radios/kr-87/inputs/set-rst-btn");
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fgUntie("/radios/kr-87/inputs/ident-btn");
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// outputs
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fgUntie("/radios/kr-87/outputs/selected-khz");
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fgUntie("/radios/kr-87/outputs/standby-khz");
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fgUntie("/radios/kr-87/outputs/needle-deg");
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fgUntie("/radios/kr-87/outputs/flight-timer");
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fgUntie("/radios/kr-87/outputs/elapsed-timer");
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// annunciators
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fgUntie("/radios/kr-87/annunciators/ant");
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fgUntie("/radios/kr-87/annunciators/adf");
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fgUntie("/radios/kr-87/annunciators/bfo");
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fgUntie("/radios/kr-87/annunciators/frq");
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fgUntie("/radios/kr-87/annunciators/flt");
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fgUntie("/radios/kr-87/annunciators/et");
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}
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// Update the various nav values based on position and valid tuned in navs
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void FGKR_87::update( double dt ) {
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double acft_lon = lon_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
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double acft_lat = lat_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
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double acft_elev = alt_node->getDoubleValue() * SG_FEET_TO_METER;
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need_update = false;
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Point3D aircraft = sgGeodToCart( Point3D( acft_lon, acft_lat, acft_elev ) );
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Point3D station;
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double az1, az2, s;
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////////////////////////////////////////////////////////////////////////
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// Radio
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////////////////////////////////////////////////////////////////////////
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if ( has_power() && serviceable->getBoolValue() ) {
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// buttons
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if ( adf_btn == 0 ) {
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ant_mode = 1;
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} else {
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ant_mode = 0;
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}
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if ( frq_btn && frq_btn != last_frq_btn && stby_mode == 0 ) {
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double tmp = freq;
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freq = stby_freq;
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stby_freq = tmp;
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} else if ( frq_btn ) {
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stby_mode = 0;
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count_mode = 0;
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}
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last_frq_btn = frq_btn;
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if ( flt_et_btn && flt_et_btn != last_flt_et_btn ) {
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if ( stby_mode == 0 ) {
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timer_mode = 0;
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} else {
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timer_mode = !timer_mode;
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}
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stby_mode = 1;
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}
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last_flt_et_btn = flt_et_btn;
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if ( set_rst_btn == 1 && set_rst_btn != last_set_rst_btn ) {
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// button depressed
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tmp_timer = 0.0;
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}
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if ( set_rst_btn == 1 && set_rst_btn == last_set_rst_btn ) {
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// button depressed and was last iteration too
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tmp_timer += dt;
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// cout << "tmp_timer = " << tmp_timer << endl;
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if ( tmp_timer > 2.0 ) {
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// button held depressed for 2 seconds
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cout << "entering elapsed count down mode" << endl;
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timer_mode = 1;
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count_mode = 2;
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elapsed_timer = 0.0;
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}
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}
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if ( set_rst_btn == 0 && set_rst_btn != last_set_rst_btn ) {
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// button released
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if ( tmp_timer > 2.0 ) {
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// button held depressed for 2 seconds, don't adjust
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// mode, just exit
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} else if ( count_mode == 2 ) {
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count_mode = 1;
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} else {
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count_mode = 0;
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elapsed_timer = 0.0;
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}
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}
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last_set_rst_btn = set_rst_btn;
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// timers
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flight_timer += dt;
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if ( set_rst_btn == 0 ) {
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// only count if set/rst button not depressed
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if ( count_mode == 0 ) {
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elapsed_timer += dt;
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} else if ( count_mode == 1 ) {
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elapsed_timer -= dt;
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if ( elapsed_timer < 1.0 ) {
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count_mode = 0;
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elapsed_timer = 0.0;
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}
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}
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}
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// annunciators
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ant_ann = !adf_btn;
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adf_ann = adf_btn;
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bfo_ann = bfo_btn;
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frq_ann = !stby_mode;
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flt_ann = stby_mode && !timer_mode;
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if ( count_mode < 2 ) {
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et_ann = stby_mode && timer_mode;
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} else {
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et_flash_time += dt;
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if ( et_ann && et_flash_time > 0.5 ) {
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et_ann = false;
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et_flash_time -= 0.5;
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} else if ( !et_ann && et_flash_time > 0.2 ) {
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et_ann = true;
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et_flash_time -= 0.2;
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}
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}
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if ( valid ) {
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// staightline distance
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station = Point3D( x, y, z );
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dist = aircraft.distance3D( station );
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// wgs84 heading
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geo_inverse_wgs_84( acft_elev,
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acft_lat * SGD_RADIANS_TO_DEGREES,
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acft_lon * SGD_RADIANS_TO_DEGREES,
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stn_lat, stn_lon,
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&az1, &az2, &s );
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heading = az1;
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// cout << " heading = " << heading
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// << " dist = " << dist << endl;
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effective_range = kludgeRange(stn_elev, acft_elev, range);
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if ( dist < effective_range * SG_NM_TO_METER ) {
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inrange = true;
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} else if ( dist < 2 * effective_range * SG_NM_TO_METER ) {
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inrange = sg_random() <
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( 2 * effective_range * SG_NM_TO_METER - dist ) /
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(effective_range * SG_NM_TO_METER);
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} else {
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inrange = false;
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}
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if ( inrange ) {
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goal_needle_deg = heading
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- fgGetDouble("/orientation/heading-deg");
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}
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} else {
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inrange = false;
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}
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if ( ant_mode ) {
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goal_needle_deg = 90.0;
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}
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} else {
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// unit turned off
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goal_needle_deg = 0.0;
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flight_timer = 0.0;
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elapsed_timer = 0.0;
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ant_ann = false;
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adf_ann = false;
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bfo_ann = false;
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frq_ann = false;
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flt_ann = false;
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et_ann = false;
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}
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// formatted timer
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double time;
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int hours, min, sec;
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if ( timer_mode == 0 ) {
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time = flight_timer;
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} else {
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time = elapsed_timer;
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}
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// cout << time << endl;
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hours = (int)(time / 3600.0);
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time -= hours * 3600.00;
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min = (int)(time / 60.0);
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time -= min * 60.0;
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sec = (int)time;
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int big, little;
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if ( hours > 0 ) {
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big = hours;
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if ( big > 99 ) {
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big = 99;
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}
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little = min;
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} else {
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big = min;
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little = sec;
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}
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if ( big > 99 ) {
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big = 99;
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}
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char formatted_timer[128];
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// cout << big << ":" << little << endl;
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snprintf(formatted_timer, 6, "%02d:%02d", big, little);
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fgSetString( "/radios/kr-87/outputs/timer-string", formatted_timer );
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while ( goal_needle_deg < 0.0 ) { goal_needle_deg += 360.0; }
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while ( goal_needle_deg >= 360.0 ) { goal_needle_deg -= 360.0; }
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double diff = goal_needle_deg - needle_deg;
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while ( diff < -180.0 ) { diff += 360.0; }
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while ( diff > 180.0 ) { diff -= 360.0; }
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needle_deg += diff * dt * 4;
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while ( needle_deg < 0.0 ) { needle_deg += 360.0; }
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while ( needle_deg >= 360.0 ) { needle_deg -= 360.0; }
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// cout << "goal = " << goal_needle_deg << " actual = " << needle_deg
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// << endl;
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// cout << "flt = " << flight_timer << " et = " << elapsed_timer
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// << " needle = " << needle_deg << endl;
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if ( valid && inrange && serviceable->getBoolValue() ) {
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// play station ident via audio system if on + ant mode,
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// otherwise turn it off
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if ( vol_btn >= 0.01 && audio_btn ) {
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SGSoundSample *sound;
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sound = globals->get_soundmgr()->find( "adf-ident" );
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if ( sound != NULL ) {
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if ( !adf_btn ) {
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sound->set_volume( vol_btn );
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} else {
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sound->set_volume( vol_btn / 4.0 );
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}
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} else {
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SG_LOG( SG_COCKPIT, SG_ALERT, "Can't find adf-ident sound" );
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}
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if ( last_time <
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globals->get_time_params()->get_cur_time() - 30 ) {
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last_time = globals->get_time_params()->get_cur_time();
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play_count = 0;
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}
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if ( play_count < 4 ) {
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// play ADF ident
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if ( !globals->get_soundmgr()->is_playing("adf-ident") ) {
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globals->get_soundmgr()->play_once( "adf-ident" );
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++play_count;
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}
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}
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} else {
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globals->get_soundmgr()->stop( "adf-ident" );
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}
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}
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}
|
|
|
|
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// Update current nav/adf radio stations based on current postition
|
|
void FGKR_87::search() {
|
|
double acft_lon = lon_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
|
|
double acft_lat = lat_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
|
|
double acft_elev = alt_node->getDoubleValue() * SG_FEET_TO_METER;
|
|
|
|
// FIXME: the panel should handle this
|
|
static string last_ident = "";
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
// ADF.
|
|
////////////////////////////////////////////////////////////////////////
|
|
|
|
FGNav *nav
|
|
= globals->get_navlist()->findByFreq(freq, acft_lon, acft_lat, acft_elev);
|
|
|
|
if ( nav != NULL ) {
|
|
char sfreq[128];
|
|
snprintf( sfreq, 10, "%.0f", freq );
|
|
ident = sfreq;
|
|
ident += nav->get_ident();
|
|
// cout << "adf ident = " << ident << endl;
|
|
valid = true;
|
|
if ( last_ident != ident ) {
|
|
last_ident = ident;
|
|
|
|
trans_ident = nav->get_trans_ident();
|
|
stn_lon = nav->get_lon();
|
|
stn_lat = nav->get_lat();
|
|
stn_elev = nav->get_elev_ft();
|
|
range = nav->get_range();
|
|
effective_range = kludgeRange(stn_elev, acft_elev, range);
|
|
x = nav->get_x();
|
|
y = nav->get_y();
|
|
z = nav->get_z();
|
|
|
|
if ( globals->get_soundmgr()->exists( "adf-ident" ) ) {
|
|
globals->get_soundmgr()->remove( "adf-ident" );
|
|
}
|
|
SGSoundSample *sound;
|
|
sound = morse.make_ident( trans_ident, LO_FREQUENCY );
|
|
sound->set_volume( 0.3 );
|
|
globals->get_soundmgr()->add( sound, "adf-ident" );
|
|
|
|
int offset = (int)(sg_random() * 30.0);
|
|
play_count = offset / 4;
|
|
last_time = globals->get_time_params()->get_cur_time() -
|
|
offset;
|
|
// cout << "offset = " << offset << " play_count = "
|
|
// << play_count << " last_time = "
|
|
// << last_time << " current time = "
|
|
// << globals->get_time_params()->get_cur_time() << endl;
|
|
|
|
// cout << "Found an adf station in range" << endl;
|
|
// cout << " id = " << nav->get_ident() << endl;
|
|
}
|
|
} else {
|
|
valid = false;
|
|
ident = "";
|
|
trans_ident = "";
|
|
globals->get_soundmgr()->remove( "adf-ident" );
|
|
last_ident = "";
|
|
// cout << "not picking up adf. :-(" << endl;
|
|
}
|
|
}
|
|
|
|
|
|
double FGKR_87::get_stby_freq() const {
|
|
if ( stby_mode == 0 ) {
|
|
return stby_freq;
|
|
} else {
|
|
if ( timer_mode == 0 ) {
|
|
return flight_timer;
|
|
} else {
|
|
return elapsed_timer;
|
|
}
|
|
}
|
|
}
|