4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2005 Develer S.r.l. (http://www.develer.com/)
35 * \author Bernardo Innocenti <bernie@develer.com>
37 * \brief Low-level timer module for Qt emulator (implementation).
42 *#* Revision 1.6 2006/09/13 18:25:22 bernie
45 *#* Revision 1.5 2006/07/19 12:56:26 bernie
46 *#* Convert to new Doxygen style.
48 *#* Revision 1.4 2006/05/28 12:17:57 bernie
49 *#* Drop almost all the Qt3 cruft.
51 *#* Revision 1.3 2006/02/21 21:28:02 bernie
52 *#* New time handling based on TIMER_TICKS_PER_SEC to support slow timers with ticks longer than 1ms.
54 *#* Revision 1.2 2006/02/20 02:01:35 bernie
57 *#* Revision 1.1 2005/11/27 03:06:36 bernie
58 *#* Qt timer emulation.
62 #include <cfg/compiler.h> /* hptime.t */
65 #include <QtCore/QDateTime>
66 #include <QtCore/QTimer>
69 // The user interrupt server routine
74 * Singleton class for Qt-based hardware timer emulation.
76 class EmulTimer : public QObject
81 /// System timer (counts ms since application startup)
84 /// The 1ms "hardware" tick counter.
88 * We deliberately don't use RAII because the real hardware
89 * we're simulating needs to be initialized manually.
93 /// Private ctor (singleton)
94 EmulTimer() : initialized(false) { }
97 /// Return singleton instance
98 static EmulTimer &instance()
104 /// Start timer emulator.
107 // Timer initialized twice?
108 ASSERT(!initialized);
110 // Record initial time
113 // Activate timer interrupt
114 timer.connect(&timer, SIGNAL(timeout()), this, SLOT(timerInterrupt()));
115 timer.start(1000 / TIMER_TICKS_PER_SEC);
120 /// Return current time in high-precision format.
124 return system_time.elapsed();
128 void timerInterrupt(void)
130 // Just call user interrupt server, timer restarts automatically.
136 #include "timer_qt_moc.cpp"
139 /// HW dependent timer initialization.
140 static void timer_hw_init(void)
142 // Kick EmulTimer initialization
143 EmulTimer::instance().init();
146 INLINE hptime_t timer_hw_hpread(void)
148 return EmulTimer::instance().hpread();