1 // ATC-Main.cxx -- FGFS interface to ATC hardware
3 // Written by Curtis Olson, started January 2002
5 // Copyright (C) 2002 Curtis L. Olson - http://www.flightgear.org/~curt
7 // This program is free software; you can redistribute it and/or
8 // modify it under the terms of the GNU General Public License as
9 // published by the Free Software Foundation; either version 2 of the
10 // License, or (at your option) any later version.
12 // This program is distributed in the hope that it will be useful, but
13 // WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 // General Public License for more details.
17 // You should have received a copy of the GNU General Public License
18 // along with this program; if not, write to the Free Software
19 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
28 #include <simgear/compiler.h>
30 #include <stdlib.h> // atoi() atof() abs()
31 #include <sys/types.h>
34 #include <stdio.h> //snprintf
35 #if defined( _MSC_VER ) || defined(__MINGW32__)
36 # include <io.h> //lseek, read, write
43 #include <simgear/debug/logstream.hxx>
44 #include <simgear/io/iochannel.hxx>
45 #include <simgear/math/sg_types.hxx>
46 #include <simgear/misc/sg_path.hxx>
47 #include <simgear/props/props.hxx>
49 #include <Scripting/NasalSys.hxx>
50 #include <Main/fg_props.hxx>
51 #include <Main/globals.hxx>
53 #include "ATC-Main.hxx"
58 // Lock the ATC hardware
59 static int fgATCMainLock( int fd ) {
61 lseek( fd, 0, SEEK_SET );
64 int result = read( fd, tmp, 1 );
66 SG_LOG( SG_IO, SG_DEBUG, "Lock failed" );
73 // Write a radios command
74 static int fgATCMainRelease( int fd ) {
76 lseek( fd, 0, SEEK_SET );
80 int result = write( fd, tmp, 1 );
83 SG_LOG( SG_IO, SG_DEBUG, "Release failed" );
90 void FGATCMain::init_config() {
91 #if defined( unix ) || defined( __CYGWIN__ )
92 // Next check home directory for .fgfsrc.hostname file
93 char *envp = ::getenv( "HOME" );
95 SGPath atcsim_config( envp );
96 atcsim_config.append( ".fgfs-atc610x.xml" );
97 readProperties( atcsim_config.str(), globals->get_props() );
103 // Open and initialize ATC hardware
104 bool FGATCMain::open() {
105 if ( is_enabled() ) {
106 SG_LOG( SG_IO, SG_ALERT, "This shouldn't happen, but the channel "
107 << "is already in use, ignoring" );
111 SG_LOG( SG_IO, SG_ALERT,
112 "Initializing ATC hardware, please wait ..." );
114 // This loads the config parameters generated by "simcal"
117 /////////////////////////////////////////////////////////////////////
118 // Open the /proc files
119 /////////////////////////////////////////////////////////////////////
121 string lock0_file = "/proc/atcflightsim/board0/lock";
122 string lock1_file = "/proc/atcflightsim/board1/lock";
124 lock0_fd = ::open( lock0_file.c_str(), O_RDWR );
125 if ( lock0_fd == -1 ) {
126 SG_LOG( SG_IO, SG_ALERT, "errno = " << errno );
128 snprintf( msg, 256, "Error opening %s", lock0_file.c_str() );
133 lock1_fd = ::open( lock1_file.c_str(), O_RDWR );
134 if ( lock1_fd == -1 ) {
135 SG_LOG( SG_IO, SG_ALERT, "errno = " << errno );
137 snprintf( msg, 256, "Error opening %s", lock1_file.c_str() );
142 if ( input0_path.str().length() ) {
143 input0 = new FGATCInput( 0, input0_path );
146 if ( input1_path.str().length() ) {
147 input1 = new FGATCInput( 1, input1_path );
150 if ( output0_path.str().length() ) {
151 output0 = new FGATCOutput( 0, output0_path );
152 output0->open( lock0_fd );
154 if ( output1_path.str().length() ) {
155 output1 = new FGATCOutput( 1, output1_path );
156 output1->open( lock1_fd );
159 set_hz( 30 ); // default to processing requests @ 30Hz
162 /////////////////////////////////////////////////////////////////////
163 // Finished initing hardware
164 /////////////////////////////////////////////////////////////////////
166 SG_LOG( SG_IO, SG_ALERT,
167 "Done initializing ATC hardware." );
173 bool FGATCMain::process() {
174 // cout << "Main::process()\n";
176 bool board0_locked = false;
177 bool board1_locked = false;
179 if ( input0 != NULL || output0 != NULL ) {
180 // Lock board0 if we have a configuration for it
181 if ( fgATCMainLock( lock0_fd ) > 0 ) {
182 board0_locked = true;
186 if ( input1 != NULL || output1 != NULL ) {
187 // Lock board1 if we have a configuration for it
188 if ( fgATCMainLock( lock1_fd ) > 0 ) {
189 board1_locked = true;
193 // cout << " locks: ";
194 // if ( board0_locked ) { cout << "board0 "; }
195 // if ( board1_locked ) { cout << "board1 "; }
198 // process the ATC inputs
199 if ( input0 != NULL && board0_locked ) {
202 if ( input1 != NULL && board1_locked ) {
206 // run our custom nasal script. This is a layer above the raw
207 // hardware inputs. It handles situations where there isn't a
208 // direct 1-1 linear mapping between ATC functionality and FG
209 // functionality, and handles situations where FG expects more
210 // functionality from the interface than the ATC hardware can
213 FGNasalSys *n = (FGNasalSys*)globals->get_subsystem("nasal");
214 bool result = n->parseAndRun( "atcsim.update()" );
216 SG_LOG( SG_GENERAL, SG_ALERT, "Nasal: atcsim.update() failed!" );
219 // process the ATC outputs
220 if ( output0 != NULL && board0_locked ) {
223 if ( output1 != NULL && board1_locked ) {
227 if ( board0_locked ) {
228 fgATCMainRelease( lock0_fd );
230 if ( board1_locked ) {
231 fgATCMainRelease( lock1_fd );
238 bool FGATCMain::close() {
239 cout << "FGATCMain::close()" << endl;
243 if ( input0 != NULL ) {
246 if ( input1 != NULL ) {
249 if ( output0 != NULL ) {
252 if ( output1 != NULL ) {
256 result = ::close( lock0_fd );
257 if ( result == -1 ) {
258 SG_LOG( SG_IO, SG_ALERT, "errno = " << errno );
260 snprintf( msg, 256, "Error closing lock0_fd" );
265 result = ::close( lock1_fd );
266 if ( result == -1 ) {
267 SG_LOG( SG_IO, SG_ALERT, "errno = " << errno );
269 snprintf( msg, 256, "Error closing lock1_fd" );