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/*
* Copyright (c) 2016 embedded brains GmbH. All rights reserved.
*
* embedded brains GmbH
* Dornierstr. 4
* 82178 Puchheim
* Germany
* <rtems@embedded-brains.de>
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#include <bsp.h>
#include <bsp/power.h>
#include <bsp/irq.h>
#include <libchip/chip.h>
#define ATSAM_ENABLE_ALARM_INTERRUPT (1u << 1)
static void set_rtc_alarm_interrupt(uint8_t interval)
{
Rtc *rtc = RTC;
rtems_time_of_day tod;
/* Clear current status register */
RTC_ClearSCCR(rtc, 0x3F);
atsam_rtc_get_time(&tod);
tod.second = (tod.second + interval) % 60;
tod.second = (((tod.second / 10) << 4) | (tod.second % 10));
rtc->RTC_TIMALR &= ~RTC_TIMALR_SECEN;
rtc->RTC_TIMALR = tod.second;
rtc->RTC_TIMALR |= RTC_TIMALR_SECEN;
RTC_EnableIt(rtc, ATSAM_ENABLE_ALARM_INTERRUPT);
}
static void rtc_interrupt_handler(void *arg)
{
atsam_power_data_rtc_driver *rtc_data;
rtc_data = (atsam_power_data_rtc_driver *)arg;
set_rtc_alarm_interrupt(rtc_data->interval);
}
static void rtc_alarm_handler(void *arg)
{
Rtc *rtc = RTC;
rtems_status_code sc;
/* Clear current status register */
RTC_ClearSCCR(rtc, 0x3F);
/* Switch off all RTC interrupts */
RTC_DisableIt(rtc, 0x1F);
/* Install RTC interrupt handler */
sc = rtems_interrupt_handler_install(RTC_IRQn,
"RTC",
RTEMS_INTERRUPT_UNIQUE,
rtc_interrupt_handler,
arg
);
assert(sc == RTEMS_SUCCESSFUL);
}
static void set_time(void)
{
rtems_time_of_day tod;
rtems_status_code sc;
atsam_rtc_get_time(&tod);
sc = rtems_clock_set(&tod);
assert(sc == RTEMS_SUCCESSFUL);
}
void atsam_power_handler_rtc_driver(
const atsam_power_control *control,
atsam_power_state state
)
{
atsam_power_data_rtc_driver *rtc_data;
Rtc *rtc = RTC;
rtc_data = (atsam_power_data_rtc_driver *)control->data.arg;
switch (state) {
case ATSAM_POWER_ON:
RTC_DisableIt(rtc, ATSAM_ENABLE_ALARM_INTERRUPT);
set_time();
break;
case ATSAM_POWER_OFF:
set_rtc_alarm_interrupt(rtc_data->interval);
break;
case ATSAM_POWER_INIT:
rtc_alarm_handler(rtc_data);
break;
default:
break;
}
}
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