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/* Periodic Interval Timer Implementation for OpenPCD
* (C) 2006 by Harald Welte <hwelte@hmw-consulting.de>
*
* 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 program 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <errno.h>
#include <sys/types.h>
#include <lib_AT91SAM7.h>
#include <AT91SAM7.h>
#include "../openpcd.h"
/* PIT runs at MCK/16 (= 3MHz) */
#define PIV_MS(x) (x * 3000)
static void pit_irq(void)
{
/* FIXME: do something */
}
void pit_mdelay(u_int32_t ms)
{
u_int32_t end;
end = (AT91F_PITGetPIIR(AT91C_BASE_PITC) + ms) % 20;
while (end < AT91F_PITGetPIIR(AT91C_BASE_PITC)) { }
}
void pit_init(void)
{
AT91F_PITC_CfgPMC();
AT91F_PITInit(AT91C_BASE_PITC, 1000 /* uS */, 48 /* MHz */);
AT91F_AIC_ConfigureIt(AT91C_BASE_AIC, AT91C_ID_SYS,
OPENPCD_IRQ_PRIO_PIT,
AT91C_AIC_SRCTYPE_INT_POSITIVE_EDGE,
&pit_irq);
//AT91F_PITEnableInt(AT91C_BASE_PITC);
}
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