4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2004 Develer S.r.l. (http://www.develer.com/)
30 * All Rights Reserved.
33 * \brief Some simple delay routines.
35 * Simple serial driver
36 * \author Francesco Sacchi <batt@develer.com>
39 #warning FIXME:This module is obsolete, yuo must refactor it.
42 #include <hw/hw_cpufreq.h>
43 #include "timer_simple_avr.h"
45 #include <cfg/compiler.h>
46 #include <cfg/macros.h> /* BV() */
51 #define MS_PER_SEC 1000UL
52 #define TIMER_PRESCALER 64UL
53 #define TIMER_DELAY_1MS (255 - CPU_FREQ / TIMER_PRESCALER / MS_PER_SEC)
56 * Wait \a time ms using timer 0.
59 void timer_delay(mtime_t time)
61 /* Set timer clock to clock_freq/64 */
66 /* Initialize timer counter register */
67 TCNT0 = TIMER_DELAY_1MS;
68 /* Clear overflow bit. */
71 while (!(TIFR & BV(TOV0)));