From f706854f93d5168bb36ea25d66a4d5b0d60c4ac2 Mon Sep 17 00:00:00 2001
From: bernie <bernie@38d2e660-2303-0410-9eaa-f027e97ec537>
Date: Sun, 27 Nov 2005 03:06:36 +0000
Subject: [PATCH] Qt timer emulation.

git-svn-id: https://src.develer.com/svnoss/bertos/trunk@451 38d2e660-2303-0410-9eaa-f027e97ec537
---
 drv/timer_qt.c | 110 +++++++++++++++++++++++++++++++++++++++++++++++++
 drv/timer_qt.h |  40 ++++++++++++++++++
 2 files changed, 150 insertions(+)
 create mode 100755 drv/timer_qt.c
 create mode 100755 drv/timer_qt.h

diff --git a/drv/timer_qt.c b/drv/timer_qt.c
new file mode 100755
index 00000000..a9e38be6
--- /dev/null
+++ b/drv/timer_qt.c
@@ -0,0 +1,110 @@
+/*!
+ * \file
+ * <!--
+ * Copyright 2005 Develer S.r.l. (http://www.develer.com/)
+ * This file is part of DevLib - See README.devlib for information.
+ * -->
+ *
+ * \version $Id$
+ *
+ * \author Bernardo Innocenti <bernie@develer.com>
+ *
+ * \brief Low-level timer module for Qt emulator (implementation).
+ */
+
+/*#*
+ *#* $Log$
+ *#* Revision 1.1  2005/11/27 03:06:36  bernie
+ *#* Qt timer emulation.
+ *#*
+ *#*/
+
+#include <cfg/compiler.h> /* hptime.t */
+
+// Qt headers
+#include <qdatetime.h>
+#include <qtimer.h>
+
+
+// The user interrupt server routine
+void timer_isr(void);
+
+
+/**
+ * Singleton class for Qt-based hardware timer emulation.
+ */
+class EmulTimer : public QObject
+{
+private:
+	Q_OBJECT;
+
+	/// System timer (counts ms since application startup)
+	QTime system_time;
+
+	/// The 1ms "hardware" tick counter.
+	QTimer timer;
+
+	/**
+	 * We deliberately don't use RAII because the real hardware
+	 * we're simulating needs to be initialized manually.
+	 */
+	bool initialized;
+
+	/// Private ctor (singleton)
+	EmulTimer() : initialized(false) { }
+
+public:
+	/// Return singleton instance
+	static EmulTimer &instance()
+	{
+		static EmulTimer et;
+		return et;
+	}
+
+	/// Start timer emulator.
+	void init()
+	{
+		// Timer initialized twice?
+		ASSERT(!initialized);
+
+		// Record initial time
+		system_time.start();
+
+		// Activate 1ms timer interrupt
+		timer.connect(&timer, SIGNAL(timeout()), this, SLOT(timerInterrupt()));
+		timer.start(1);
+
+		initialized = true;
+	}
+
+	/// Return current time in high-precision format.
+	hptime_t hpread()
+	{
+		ASSERT(initialized);
+		return system_time.elapsed();
+	}
+
+public slots:
+	void timerInterrupt(void)
+	{
+		// Just call user interrupt server, timer restarts automatically.
+		timer_isr();
+	}
+
+};
+
+#include "timer_qt_moc.cpp"
+
+
+/// HW dependent timer initialization.
+extern "C" static void timer_hw_init(void)
+{
+	// Kick EmulTimer initialization
+	EmulTimer::instance().init();
+}
+
+extern "C" INLINE hptime_t timer_hw_hpread(void)
+{
+	return EmulTimer::instance().hpread();
+}
+
diff --git a/drv/timer_qt.h b/drv/timer_qt.h
new file mode 100755
index 00000000..88fb71ea
--- /dev/null
+++ b/drv/timer_qt.h
@@ -0,0 +1,40 @@
+/*!
+ * \file
+ * <!--
+ * Copyright 2005 Develer S.r.l. (http://www.develer.com/)
+ * This file is part of DevLib - See README.devlib for information.
+ * -->
+ *
+ * \version $Id$
+ *
+ * \author Bernardo Innocenti <bernie@develer.com>
+ *
+ * \brief Low-level timer module for AVR (interface).
+ */
+
+/*#*
+ *#* $Log$
+ *#* Revision 1.1  2005/11/27 03:06:36  bernie
+ *#* Qt timer emulation.
+ *#*
+ *#*/
+#ifndef DRV_TIMER_QT_H
+#define DRV_TIMER_QT_H
+
+// HW dependent timer initialization
+
+#define DEFINE_TIMER_ISR     void timer_isr(void)
+#define TIMER_TICKS_PER_MSEC 1
+#define TIMER_HW_CNT         (1<<31) /* We assume 32bit integers here */
+
+/// Type of time expressed in ticks of the hardware high-precision timer.
+typedef unsigned int hptime_t;
+
+/// Frequency of the hardware high-precision timer.
+#define TIMER_HW_HPTICKS_PER_SEC  1000
+
+/// Not needed, IRQ timer flag cleared automatically.
+#define timer_hw_irq() do {} while (0)
+
+
+#endif /* DRV_TIMER_QT_H */
-- 
2.25.1