68 lines
2 KiB
C
68 lines
2 KiB
C
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 by Björn Stenberg
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef TICK_H
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#define TICK_H
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#include "config.h"
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#include "system.h" /* for NULL */
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extern void init_tick(void);
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#define HZ 100 /* number of ticks per second */
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#define MAX_NUM_TICK_TASKS 8
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/* global tick variable */
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#if defined(CPU_PP) && defined(BOOTLOADER) && \
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!defined(HAVE_BOOTLOADER_USB_MODE)
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/* We don't enable interrupts in the PP bootloader unless USB mode is
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enabled for it, so we need to fake the current_tick variable */
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#define current_tick (signed)(USEC_TIMER/10000)
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static inline void call_tick_tasks(void)
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{
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}
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#else
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extern volatile long current_tick;
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/* inline helper for implementing target interrupt handler */
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static inline void call_tick_tasks(void)
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{
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extern void (*tick_funcs[MAX_NUM_TICK_TASKS+1])(void);
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void (**p)(void) = tick_funcs;
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void (*fn)(void);
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current_tick++;
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for(fn = *p; fn != NULL; fn = *(++p))
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{
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fn();
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}
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}
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#endif
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/* implemented in target tree */
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extern void tick_start(unsigned int interval_in_ms) INIT_ATTR;
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extern int tick_add_task(void (*f)(void));
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extern int tick_remove_task(void (*f)(void));
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#endif /* TICK_H */
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