fuzev2: prevent button light flickering when accessing µSD
[kugel-rb.git] / firmware / timer.c
bloba923290a9439e472365e70e64515bc59e7784bfa
1 /***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
10 * Copyright (C) 2005 Jens Arnold
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version 2
15 * of the License, or (at your option) any later version.
17 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
18 * KIND, either express or implied.
20 ****************************************************************************/
22 #include <stdbool.h>
23 #include "config.h"
24 #include "cpu.h"
25 #include "system.h"
26 #include "timer.h"
27 #include "logf.h"
29 static int timer_prio = -1;
30 void SHAREDBSS_ATTR (*pfn_timer)(void) = NULL; /* timer callback */
31 void SHAREDBSS_ATTR (*pfn_unregister)(void) = NULL; /* unregister callback */
33 /* Register a user timer, called every <cycles> TIMER_FREQ cycles */
34 bool timer_register(int reg_prio, void (*unregister_callback)(void),
35 long cycles, void (*timer_callback)(void)
36 IF_COP(, int core))
38 if (reg_prio <= timer_prio || cycles == 0)
39 return false;
41 if (!timer_set(cycles, true))
42 return false;
44 pfn_timer = timer_callback;
45 pfn_unregister = unregister_callback;
46 timer_prio = reg_prio;
48 return timer_start(IF_COP(core));
51 bool timer_set_period(long cycles)
53 return timer_set(cycles, false);
56 void timer_unregister(void)
58 timer_stop();
60 pfn_timer = NULL;
61 pfn_unregister = NULL;
62 timer_prio = -1;