9926c933c7
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21672 a1c6a512-1295-4272-9138-f99709370657
59 lines
1.9 KiB
C
59 lines
1.9 KiB
C
/***************************************************************************
|
|
* __________ __ ___.
|
|
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
|
|
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
|
|
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
|
|
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
|
|
* \/ \/ \/ \/ \/
|
|
* $Id$
|
|
*
|
|
* Copyright © 2009 Bertrik Sikken
|
|
*
|
|
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
****************************************************************************/
|
|
#include "config.h"
|
|
#include "system.h"
|
|
#include "kernel.h"
|
|
|
|
/* S5L8700 driver for the kernel timer
|
|
|
|
Timer B is configured as a 10 kHz timer (assuming PCLK = 100 MHz)
|
|
*/
|
|
|
|
void INT_TIMERB(void)
|
|
{
|
|
/* clear interrupt */
|
|
TBCON = TBCON;
|
|
|
|
call_tick_tasks(); /* Run through the list of tick tasks */
|
|
}
|
|
|
|
void tick_start(unsigned int interval_in_ms)
|
|
{
|
|
int cycles = 10 * interval_in_ms;
|
|
|
|
/* enable timer clock */
|
|
PWRCON &= ~(1 << 4);
|
|
|
|
/* configure timer for 10 kHz */
|
|
TBCMD = (1 << 1); /* TB_CLR */
|
|
TBPRE = 625; /* prescaler */
|
|
TBCON = (0 << 13) | /* TB_INT1_EN */
|
|
(1 << 12) | /* TB_INT0_EN */
|
|
(0 << 11) | /* TB_START */
|
|
(2 << 8) | /* TB_CS = PCLK / 16 */
|
|
(0 << 4); /* TB_MODE_SEL = interval mode */
|
|
TBDATA0 = cycles-1; /* set interval period */
|
|
TBCMD = (1 << 0); /* TB_EN */
|
|
|
|
/* enable timer interrupt */
|
|
INTMSK |= (1 << 7);
|
|
}
|
|
|