1 /***************************************************************************
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
10 * Copyright (C) 2007 by Tomasz Malesinski
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 ****************************************************************************/
25 void timer_handler(void)
27 /* Run through the list of tick tasks */
33 void tick_start(unsigned int interval_in_ms
)
35 TIMER0
.ctrl
&= ~0x80; /* Disable the counter */
36 TIMER0
.ctrl
|= 0x40; /* Reload after counting down to zero */
37 TIMER0
.load
= 3000000 * interval_in_ms
/ 1000;
38 TIMER0
.ctrl
&= ~0xc; /* No prescaler */
39 TIMER0
.clr
= 1; /* Clear the interrupt request */
41 irq_set_int_handler(IRQ_TIMER0
, timer_handler
);
42 irq_enable_int(IRQ_TIMER0
);
44 TIMER0
.ctrl
|= 0x80; /* Enable the counter */