156 lines
3.5 KiB
C
156 lines
3.5 KiB
C
/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2005 Develer S.r.l. (http://www.develer.com/)
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*
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* -->
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*
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*
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* \author Bernie Innocenti <bernie@codewiz.org>
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*
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* \brief Low-level timer module for Qt emulator (implementation).
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*/
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#include <cfg/compiler.h> /* hptime.t */
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// Qt headers
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#include <QtCore/QDateTime>
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#include <QtCore/QTimer>
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#if CONFIG_KERN_IRQ
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#include <kern/irq.h>
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#endif
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// The user interrupt server routine
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void timer_isr(void);
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/**
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* Singleton class for Qt-based hardware timer emulation.
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*/
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class EmulTimer : public QObject
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{
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private:
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Q_OBJECT;
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/// System timer (counts ms since application startup)
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QTime system_time;
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/// The 1ms "hardware" tick counter.
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QTimer timer;
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/**
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* We deliberately don't use RAII because the real hardware
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* we're simulating needs to be initialized manually.
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*/
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bool initialized;
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/// Private ctor (singleton)
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EmulTimer() : initialized(false) { }
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public:
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/// Return singleton instance
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static EmulTimer &instance()
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{
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static EmulTimer et;
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return et;
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}
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/// Start timer emulator.
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void init()
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{
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// Timer initialized twice?
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ASSERT(!initialized);
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// Record initial time
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system_time.start();
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#if CONFIG_KERN_IRQ
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irq_register(SIGALRM, timer_isr);
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#endif
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// Activate timer interrupt
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connect(&timer, SIGNAL(timeout()), SLOT(timerInterrupt()));
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timer.start(1000 / TIMER_TICKS_PER_SEC);
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initialized = true;
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}
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void cleanup()
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{
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// Timer cleaned twice?
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ASSERT(initialized);
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timer.stop();
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timer.disconnect();
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initialized = false;
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}
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/// Return current time in high-precision format.
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hptime_t hpread()
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{
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ASSERT(initialized);
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return system_time.elapsed();
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}
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public slots:
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void timerInterrupt(void)
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{
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// Just call user interrupt server, timer restarts automatically.
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#if CONFIG_KERN_IRQ
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irq_entry(SIGALRM);
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#else
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timer_isr();
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#endif
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}
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};
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#include "timer_qt_moc.cpp"
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/// HW dependent timer initialization.
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static void timer_hw_init(void)
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{
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EmulTimer::instance().init();
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}
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static void timer_hw_cleanup(void)
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{
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EmulTimer::instance().cleanup();
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}
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INLINE hptime_t timer_hw_hpread(void)
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{
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return EmulTimer::instance().hpread();
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}
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/** Not needed, timer IRQ handler called only for timer source */
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#define timer_hw_triggered() (true)
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