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29 * Copyright 2005 Develer S.r.l. (http://www.develer.com/)
35 * \author Bernie Innocenti <bernie@codewiz.org>
37 * \brief Low-level timer module for Qt emulator (implementation).
39 #include <cfg/compiler.h> /* hptime.t */
42 #include <QtCore/QDateTime>
43 #include <QtCore/QTimer>
50 // The user interrupt server routine
55 * Singleton class for Qt-based hardware timer emulation.
57 class EmulTimer : public QObject
62 /// System timer (counts ms since application startup)
65 /// The 1ms "hardware" tick counter.
69 * We deliberately don't use RAII because the real hardware
70 * we're simulating needs to be initialized manually.
74 /// Private ctor (singleton)
75 EmulTimer() : initialized(false) { }
78 /// Return singleton instance
79 static EmulTimer &instance()
85 /// Start timer emulator.
88 // Timer initialized twice?
91 // Record initial time
95 irq_register(SIGALRM, timer_isr);
98 // Activate timer interrupt
99 connect(&timer, SIGNAL(timeout()), SLOT(timerInterrupt()));
100 timer.start(1000 / TIMER_TICKS_PER_SEC);
107 // Timer cleaned twice?
116 /// Return current time in high-precision format.
120 return system_time.elapsed();
124 void timerInterrupt(void)
126 // 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 EmulTimer::instance().init();
145 static void timer_hw_cleanup(void)
147 EmulTimer::instance().cleanup();
150 INLINE hptime_t timer_hw_hpread(void)
152 return EmulTimer::instance().hpread();
155 /** Not needed, timer IRQ handler called only for timer source */
156 #define timer_hw_triggered() (true)