4 * Copyright 2005 Develer S.r.l. (http://www.develer.com/)
5 * This file is part of DevLib - See README.devlib for information.
10 * \author Bernardo Innocenti <bernie@develer.com>
12 * \brief Low-level timer module for Qt emulator (implementation).
17 *#* Revision 1.4 2006/05/28 12:17:57 bernie
18 *#* Drop almost all the Qt3 cruft.
20 *#* Revision 1.3 2006/02/21 21:28:02 bernie
21 *#* New time handling based on TIMER_TICKS_PER_SEC to support slow timers with ticks longer than 1ms.
23 *#* Revision 1.2 2006/02/20 02:01:35 bernie
26 *#* Revision 1.1 2005/11/27 03:06:36 bernie
27 *#* Qt timer emulation.
31 #include <cfg/compiler.h> /* hptime.t */
34 #include <QtCore/QDateTime>
35 #include <QtCore/QTimer>
38 // The user interrupt server routine
43 * Singleton class for Qt-based hardware timer emulation.
45 class EmulTimer : public QObject
50 /// System timer (counts ms since application startup)
53 /// The 1ms "hardware" tick counter.
57 * We deliberately don't use RAII because the real hardware
58 * we're simulating needs to be initialized manually.
62 /// Private ctor (singleton)
63 EmulTimer() : initialized(false) { }
66 /// Return singleton instance
67 static EmulTimer &instance()
73 /// Start timer emulator.
76 // Timer initialized twice?
79 // Record initial time
82 // Activate timer interrupt
83 timer.connect(&timer, SIGNAL(timeout()), this, SLOT(timerInterrupt()));
84 timer.start(1000 / TIMER_TICKS_PER_SEC);
89 /// Return current time in high-precision format.
93 return system_time.elapsed();
97 void timerInterrupt(void)
99 // Just call user interrupt server, timer restarts automatically.
105 #include "timer_qt_moc.cpp"
108 /// HW dependent timer initialization.
109 extern "C" static void timer_hw_init(void)
111 // Kick EmulTimer initialization
112 EmulTimer::instance().init();
115 extern "C" INLINE hptime_t timer_hw_hpread(void)
117 return EmulTimer::instance().hpread();