From 302a831599b5083a3284873a8f85b4a5c0ab8cd0 Mon Sep 17 00:00:00 2001
From: curt <curt>
Date: Mon, 16 Nov 1998 13:57:42 +0000
Subject: [PATCH] Initial revision.

---
 Main/fg_serial.cxx | 268 +++++++++++++++++++++++++++++++++++++++++++++
 Main/fg_serial.hxx |  72 ++++++++++++
 2 files changed, 340 insertions(+)
 create mode 100644 Main/fg_serial.cxx
 create mode 100644 Main/fg_serial.hxx

diff --git a/Main/fg_serial.cxx b/Main/fg_serial.cxx
new file mode 100644
index 000000000..54dfe2c33
--- /dev/null
+++ b/Main/fg_serial.cxx
@@ -0,0 +1,268 @@
+// fg_serial.cxx -- higher level serial port management routines
+//
+// Written by Curtis Olson, started November 1998.
+//
+// Copyright (C) 1998  Curtis L. Olson - curt@flightgear.org
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation; either version 2 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+//
+// $Id$
+// (Log is kept at end of this file)
+
+
+#include <stdlib.h>   // atoi()
+#include <string>
+
+#include <Aircraft/aircraft.hxx>
+#include <Debug/logstream.hxx>
+#include <Include/fg_constants.h>
+#include <Serial/serial.hxx>
+#include <Time/fg_time.hxx>
+
+#include "options.hxx"
+
+#include "fg_serial.hxx"
+
+
+// support up to four serial channels.  Each channel can be assigned
+// to an arbitrary port.  Bi-directional communication is supported by
+// the underlying layer.
+
+// define the four channels
+fgSERIAL port_a;
+fgSERIAL port_b;
+fgSERIAL port_c;
+fgSERIAL port_d;
+
+// the type of each channel
+fgSerialPortKind port_a_kind = FG_SERIAL_DISABLED;
+fgSerialPortKind port_b_kind = FG_SERIAL_DISABLED;
+fgSerialPortKind port_c_kind = FG_SERIAL_DISABLED;
+fgSerialPortKind port_d_kind = FG_SERIAL_DISABLED;
+
+
+// configure a port based on the config string
+static bool config_port(fgSERIAL& s, fgSerialPortKind& kind,
+				    const string& config)
+{
+    string::size_type begin, end;
+
+    string device;
+    string format;
+    string baud;
+    string direction;
+
+    begin = 0;;
+
+    // device name
+    end = config.find(",", begin);
+    if ( end == string::npos ) {
+	return false;
+    }
+    
+    device = config.substr(begin, end - begin);
+    begin = end + 1;
+    cout << "  device = " << device << endl;
+
+    // format
+    end = config.find(",", begin);
+    if ( end == string::npos ) {
+	return false;
+    }
+    
+    format = config.substr(begin, end - begin);
+    begin = end + 1;
+    cout << "  format = " << format << endl;
+
+    // baud
+    end = config.find(",", begin);
+    if ( end == string::npos ) {
+	return false;
+    }
+    
+    baud = config.substr(begin, end - begin);
+    begin = end + 1;
+    cout << "  baud = " << baud << endl;
+
+    // direction
+    direction = config.substr(begin);
+    cout << "  direction = " << direction << endl;
+
+    if ( s.is_enabled() ) {
+	FG_LOG( FG_SERIAL, FG_ALERT, "This shouldn't happen, but the port " 
+		<< "is already in use, ignoring" );
+	return false;
+    }
+
+    if ( ! s.open_port( device ) ) {
+	FG_LOG( FG_SERIAL, FG_ALERT, "Error opening device: " << device );
+    }
+
+    if ( ! s.set_baud( atoi( baud.c_str() ) ) ) {
+	FG_LOG( FG_SERIAL, FG_ALERT, "Error setting baud: " << baud );
+    }
+
+    if ( format == "nmea" ) {
+	if ( direction == "out" ) {
+	    kind = FG_SERIAL_NMEA_OUT;
+	} else if ( direction == "in" ) {
+	    kind = FG_SERIAL_NMEA_IN;
+	} else {
+	    FG_LOG( FG_SERIAL, FG_ALERT, "Unknown direction" );
+	    return false;
+	}
+    } else if ( format == "fgfs" ) {
+	if ( direction == "out" ) {
+	    kind = FG_SERIAL_FGFS_OUT;
+	} else if ( direction == "in" ) {
+	    kind = FG_SERIAL_FGFS_IN;
+	} else {
+	    FG_LOG( FG_SERIAL, FG_ALERT, "Unknown direction" );
+	    return false;
+	}
+    } else {
+	FG_LOG( FG_SERIAL, FG_ALERT, "Unknown format" );
+	return false;
+    }
+
+    return true;
+}
+
+
+// initialize serial ports based on command line options (if any)
+void fgSerialInit() {
+    if ( current_options.get_port_a_config() != "" ) {
+	config_port(port_a, port_a_kind, current_options.get_port_a_config() );
+    }
+
+    if ( current_options.get_port_b_config() != "" ) {
+	config_port(port_b, port_b_kind, current_options.get_port_b_config() );
+    }
+
+    if ( current_options.get_port_c_config() != "" ) {
+	config_port(port_c, port_c_kind, current_options.get_port_c_config() );
+    }
+
+    if ( current_options.get_port_d_config() != "" ) {
+	config_port(port_d, port_d_kind, current_options.get_port_d_config() );
+    }
+}
+
+
+static void send_nmea_out( fgSERIAL& s ) {
+    char nmea[256];
+    char dir;
+    int deg;
+    double min;
+    fgFLIGHT *f;
+    fgTIME *t;
+
+    f = current_aircraft.flight;
+    t = &cur_time_params;
+
+    char utc[10];
+    sprintf( utc, "%02d%02d%02d", 
+	     t->gmt->tm_hour, t->gmt->tm_min, t->gmt->tm_sec );
+
+    char lat[20];
+    double latd = FG_Latitude * RAD_TO_DEG;
+    if ( latd < 0.0 ) {
+	latd *= -1.0;
+	dir = 'S';
+    } else {
+	dir = 'N';
+    }
+    deg = (int)(latd);
+    min = (latd - (double)deg) * 60.0;
+    sprintf( lat, "%02d%06.3f,%c", abs(deg), min, dir);
+
+    char lon[20];
+    double lond = FG_Longitude * RAD_TO_DEG;
+    if ( lond < 0.0 ) {
+	lond *= -1.0;
+	dir = 'W';
+    } else {
+	dir = 'E';
+    }
+    deg = (int)(lond);
+    min = (lond - (double)deg) * 60.0;
+    sprintf( lon, "%02d%06.3f,%c", abs(deg), min, dir);
+
+    char speed[10];
+    sprintf( speed, "%05.1f", FG_V_equiv_kts );
+
+    char heading[10];
+    sprintf( heading, "%05.1f", FG_Psi * RAD_TO_DEG );
+
+    char date[10];
+    sprintf( date, "%02d%02d%02d", 
+	     t->gmt->tm_mday, t->gmt->tm_mon+1, t->gmt->tm_year );
+
+    // $GPRMC,HHMMSS,A,DDMM.MMM,N,DDDMM.MMM,W,XXX.X,XXX.X,DDMMYY,XXX.X,E*XX
+    sprintf( nmea, "$GPRMC,%s,A,%s,%s,%s,%s,%s,000.0,E*00\n",
+	     utc, lat, lon, speed, heading, date );
+
+    FG_LOG( FG_SERIAL, FG_DEBUG, nmea << endl );
+    s.write_port(nmea);
+}
+
+static void read_nmea_in( fgSERIAL& s ) {
+}
+
+static void send_fgfs_out( fgSERIAL& s ) {
+}
+
+static void read_fgfs_in( fgSERIAL& s ) {
+}
+
+
+// one more level of indirection ...
+static void process_port( fgSERIAL& s, const fgSerialPortKind kind ) {
+    if ( kind == FG_SERIAL_NMEA_OUT ) {
+	send_nmea_out(s);
+    } else if ( kind == FG_SERIAL_NMEA_IN ) {
+	read_nmea_in(s);
+    } else if ( kind == FG_SERIAL_FGFS_OUT ) {
+	send_fgfs_out(s);
+    } else if ( kind == FG_SERIAL_FGFS_IN ) {
+	read_fgfs_in(s);
+    }
+}
+
+
+// process any serial port work
+void fgSerialProcess() {
+    if ( port_a_kind != FG_SERIAL_DISABLED ) {
+	process_port(port_a, port_a_kind);
+    }
+
+    if ( port_b_kind != FG_SERIAL_DISABLED ) {
+	process_port(port_b, port_b_kind);
+    }
+
+    if ( port_c_kind != FG_SERIAL_DISABLED ) {
+	process_port(port_c, port_c_kind);
+    }
+
+    if ( port_d_kind != FG_SERIAL_DISABLED ) {
+	process_port(port_d, port_d_kind);
+    }
+}
+
+
+// $Log$
+// Revision 1.1  1998/11/16 13:57:42  curt
+// Initial revision.
+//
diff --git a/Main/fg_serial.hxx b/Main/fg_serial.hxx
new file mode 100644
index 000000000..94281e8e2
--- /dev/null
+++ b/Main/fg_serial.hxx
@@ -0,0 +1,72 @@
+// fg_serial.hxx -- Higher level serial port managment routines
+//
+// Written by Curtis Olson, started November 1998.
+//
+// Copyright (C) 1998  Curtis L. Olson - curt@flightgear.org
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation; either version 2 of the
+// License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+//
+// $Id$
+// (Log is kept at end of this file)
+
+
+#ifndef _FG_SERIAL_HXX
+#define _FG_SERIAL_HXX
+
+
+#ifndef __cplusplus
+# error This library requires C++
+#endif
+
+
+#include <Serial/serial.hxx>
+
+
+// Types of serial port protocols
+enum fgSerialPortKind {
+    FG_SERIAL_DISABLED = 0,
+    FG_SERIAL_NMEA_OUT = 1,
+    FG_SERIAL_NMEA_IN = 2,
+    FG_SERIAL_FGFS_OUT = 3,
+    FG_SERIAL_FGFS_IN = 4
+};
+
+
+// support up to four serial channels.  Each channel can be assigned
+// to an arbitrary port.  Bi-directional communication is supported by
+// the underlying layer.
+
+// define the four channels
+extern fgSERIAL port_a;
+extern fgSERIAL port_b;
+extern fgSERIAL port_c;
+extern fgSERIAL port_d;
+
+
+// initialize serial ports based on command line options (if any)
+void fgSerialInit();
+
+
+// process any serial port work
+void fgSerialProcess();
+
+
+#endif // _FG_SERIAL_HXX
+
+
+// $Log$
+// Revision 1.1  1998/11/16 13:57:43  curt
+// Initial revision.
+//
-- 
2.39.2