Qt timer emulation.

git-svn-id: https://src.develer.com/svnoss/bertos/trunk@451 38d2e660-2303-0410-9eaa-f027e97ec537

diff --git a/drv/timer_qt.c b/drv/timer_qt.c
new file mode 100755 (executable)
index 0000000..a9e38be
--- /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 (executable)
index 0000000..88fb71e
--- /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 */