beep.c

来自「EBD7312 蜂鸣器驱动 STD调试代码」· C语言 代码 · 共 51 行

/*
 * $Id: beep.c,v 1.2 2003/08/29 03:13:14 casic Exp $
 *
 * beep.c : beep driver
 *
 * Copyright (C) 2003 ynding ( [e-mail] )
 *
 * This program 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#include "beep.h"

/* time delay */
void wait(int time)
{
	int i = 0;
	int j = 0;

	for ( i=0;i<time;++i ){
		for ( j=0;j<1000;++j )
			;
	}

	return;
}

/* turn on the beep */
void beep_on(void)
{
	SYSCON2 |= BUZFREQ;
}

/* turn off the beep */
void beep_off(void)
{
	SYSCON2 &= ~BUZFREQ;
}