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/* $Id$
 * $URL$
 *
 * timer widget handling
 *
 * Copyright (C) 2006 Michael Reinelt <michael@reinelt.co.at>
 * Copyright (C) 2006 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
 *
 * This file is part of LCD4Linux.
 *
 * LCD4Linux 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, or (at your option)
 * any later version.
 *
 * LCD4Linux 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */


#ifndef _WIDGET_TIMER_H_
#define _WIDGET_TIMER_H_

#include "property.h"

typedef struct WIDGET_TIMER {
    PROPERTY expression;	/* main timer expression */
    PROPERTY update;		/* update interval (msec) */
    PROPERTY active;		/* timer active? */
} WIDGET_TIMER;

extern WIDGET_CLASS Widget_Timer;

int widget_timer_register(void);

#endif
y of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * * $Log: udelay.c,v $ * Revision 1.3 2001/03/01 22:33:50 reinelt * * renamed Raster_flush() to PPM_flush() * * Revision 1.2 2000/07/31 10:43:44 reinelt * * some changes to support kernel-2.4 (different layout of various files in /proc) * * Revision 1.1 2000/04/15 16:56:52 reinelt * * moved delay loops to udelay.c * renamed -d (debugging) switch to -v (verbose) * new switch -d to calibrate delay loop * 'Delay' entry for HD44780 back again * delay loops will not calibrate automatically, because this will fail with hich CPU load * */ /* * * exported fuctions: * * void udelay (unsigned long usec) * delays program execution for usec microseconds * uses global variable 'loops_per_usec', which has to be set before. * This function does busy-waiting! so use only for delays smaller * than 10 msec * * void udelay_calibrate (void) * does a binary approximation for 'loops_per_usec' * should be called several times on an otherwise idle machine * the maximum value should be used * */ #include <stdlib.h> #include <stdio.h> #include <time.h> #include "udelay.h" unsigned long loops_per_usec; void udelay (unsigned long usec) { unsigned long loop=usec*loops_per_usec; __asm__ (".align 16\n" "1:\tdecl %0\n" "\tjne 1b" : /* no result */ :"a" (loop)); } /* adopted from /usr/src/linux/init/main.c */ void udelay_calibrate (void) { clock_t tick; unsigned long bit; loops_per_usec=1; while (loops_per_usec<<=1) { tick=clock(); while (clock()==tick); tick=clock(); udelay(1000000/CLK_TCK); if (clock()>tick) break; } loops_per_usec>>=1; bit=loops_per_usec; while (bit>>=1) { loops_per_usec|=bit; tick=clock(); while (clock()==tick); tick=clock(); udelay(1000000/CLK_TCK); if (clock()>tick) loops_per_usec&=~bit; } }