OpenModem/bertos/cpu/avr/drv/timer_simple_avr.c

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2014-04-03 14:21:37 -06:00
/**
* \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 2004 Develer S.r.l. (http://www.develer.com/)
* All Rights Reserved.
* -->
*
* \brief Some simple delay routines.
*
* Simple serial driver
* \author Francesco Sacchi <batt@develer.com>
*/
#warning FIXME:This module is obsolete, yuo must refactor it.
#if 0
#include <hw/hw_cpufreq.h>
#include "timer_simple_avr.h"
#include <drv/wdt.h>
#include <cfg/compiler.h>
#include <cfg/macros.h> /* BV() */
#include <avr/io.h>
#define MS_PER_SEC 1000UL
#define TIMER_PRESCALER 64UL
#define TIMER_DELAY_1MS (255 - CPU_FREQ / TIMER_PRESCALER / MS_PER_SEC)
/**
* Wait \a time ms using timer 0.
*
*/
void timer_delay(mtime_t time)
{
/* Set timer clock to clock_freq/64 */
TCCR0 = BV(CS02);
while (time--)
{
/* Initialize timer counter register */
TCNT0 = TIMER_DELAY_1MS;
/* Clear overflow bit. */
TIFR |= BV(TOV0);
/* Wait overflow. */
while (!(TIFR & BV(TOV0)));
#if CONFIG_WATCHDOG
wdt_reset();
#endif
}
}
#endif