--- /dev/null
+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction. Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License. This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2003, 2004, 2005, 2010 Develer S.r.l. (http://www.develer.com/)
+ * Copyright 2000 Bernie Innocenti <bernie@codewiz.org>
+ * Copyright 2011 Onno <developer@gorgoz.org>
+ *
+ * -->
+ *
+ * \brief Low-level timer module for AVR XMEGA (interface).
+ *
+ * This file is heavily inspired by the AVR implementation for BeRTOS,
+ * but uses a different approach for implementing the different debug
+ * ports, by using the timer structs.
+ *
+ * \author Onno <developer@gorgoz.org>
+ *
+ */
+
+#ifndef DRV_TIMER_XMEGA_H
+#define DRV_TIMER_XMEGA_H
+
+#include <hw/hw_cpufreq.h> /* CPU_FREQ */
+
+#include "cfg/cfg_timer.h" /* CONFIG_TIMER */
+#include <cfg/compiler.h> /* uint8_t */
+#include <cfg/macros.h> /* DIV_ROUND */
+
+#include <avr/io.h>
+#include <avr/interrupt.h>
+
+/*
+ * \name Values for CONFIG_TIMER.
+ *
+ * Select which hardware timer interrupt to use for system clock and softtimers.
+ * $WIZ$ timer_select = "TIMER_USE_TCC0", "TIMER_USE_TCC1", "TIMER_USE_TCD0", "TIMER_USE_TCE0", "TIMER_USE_TCD1", "TIMER_DEFAULT"
+ */
+#define TIMER_USE_TCC0 1
+#define TIMER_USE_TCC1 2
+#define TIMER_USE_TCD0 3
+#define TIMER_USE_TCE0 4
+// The XMEGA A Family has one extra timer
+#ifdef CPU_AVR_XMEGA_A
+ #define TIMER_USE_TCD1 5
+#endif
+
+#define TIMER_DEFAULT TIMER_USE_TCC1 ///< Default system timer
+
+/*
+ * Hardware dependent timer initialization.
+ */
+#if (CONFIG_TIMER == TIMER_USE_TCC0)
+ #define TIMER_OVF_VECT TCC0_OVF_vect
+ #define TIMERCOUNTER TCC0
+#elif (CONFIG_TIMER == TIMER_USE_TCC1)
+ #define TIMER_OVF_VECT TCC1_OVF_vect
+ #define TIMERCOUNTER TCC1
+#elif (CONFIG_TIMER == TIMER_USE_TCD0)
+ #define TIMER_OVF_VECT TCD0_OVF_vect
+ #define TIMERCOUNTER TCD0
+#elif (CONFIG_TIMER == TIMER_USE_TCE0)
+ #define TIMER_OVF_VECT TCE0_OVF_vect
+ #define TIMERCOUNTER TCE0
+#elif (CONFIG_TIMER == TIMER_USE_TCD1)
+ #define TIMER_OVF_VECT TCD1_OVF_vect
+ #define TIMERCOUNTER TCD1
+#else
+ #error Unimplemented value for CONFIG_TIMER
+#endif /* CONFIG_TIMER */
+
+//define the Interrupt Service Routine for this Timer Mode
+#define DEFINE_TIMER_ISR DECLARE_ISR_CONTEXT_SWITCH(TIMER_OVF_VECT)
+//define the Ticks per second we want
+#define TIMER_TICKS_PER_SEC 1000
+//define the Prescaler to use, which is dependend on the amount
+//of ticks per second, the maximum value for the TOP value of the
+//timer (0xFFFF) and the clock frequency.
+//The maximum clock frequency is 32Mhz, so as long as the TIMER_TICKS_PER_SEC
+//is larger then (about) 500 no prescaler is required.
+#define TIMER_PRESCALER 1
+//define the TOP/PERIOD value
+#define TIMER_PERIOD_VALUE DIV_ROUND(DIV_ROUND(CPU_FREQ, TIMER_PRESCALER), TIMER_TICKS_PER_SEC)
+//check if the TIMER_PRESCALER is large enough to accomate for the TIMER_TICKS_PER_SEC
+#if TIMER_PERIOD_VALUE > 0xFFFF
+ #error Timer cannot generate the required Ticks per second, please adjust TIMER_PRESCALER
+#endif
+//define TIMER_HW_CNT it is used by the timer.c module to determine the 'edge' of the hardware counter
+#define TIMER_HW_CNT TIMER_PERIOD_VALUE
+/** Frequency of the hardware high precision timer. */
+#define TIMER_HW_HPTICKS_PER_SEC DIV_ROUND(CPU_FREQ, TIMER_PRESCALER)
+
+// Type of time expressed in ticks of the hardware high-precision timer
+typedef uint16_t hptime_t;
+#define SIZEOF_HPTIME_T 2
+
+INLINE hptime_t timer_hw_hpread(void)
+{
+ return (TIMERCOUNTER).CNT;
+}
+
+/* Not needed, IRQ timer flag cleared automatically */
+#define timer_hw_irq() do {} while (0)
+
+/* Not needed, timer IRQ handler called only for timer source */
+#define timer_hw_triggered() (true)
+
+void timer_hw_init(void);
+
+#endif /* DRV_TIMER_XMEGA_H */
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