forked from Imagelibrary/rtems
118 lines
2.5 KiB
C
118 lines
2.5 KiB
C
/*
|
|
* Copyright (c) 2016 embedded brains GmbH. All rights reserved.
|
|
*
|
|
* 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 RTC_IER_ALREN
|
|
|
|
static void set_rtc_alarm_interrupt(uint32_t interval)
|
|
{
|
|
Rtc *rtc = RTC;
|
|
uint8_t hour;
|
|
uint8_t minute;
|
|
uint8_t second;
|
|
uint32_t time;
|
|
|
|
/* Clear current status register */
|
|
RTC_ClearSCCR(rtc, 0x3F);
|
|
|
|
RTC_GetTime(rtc, &hour, &minute, &second);
|
|
|
|
time = UINT32_C(3600) * hour + UINT32_C(60) * minute + second;
|
|
time = (time + interval) % (UINT32_C(24) * 3600);
|
|
|
|
second = (uint8_t) (time % 60);
|
|
minute = (uint8_t) ((time / 60) % 60);
|
|
hour = (uint8_t) (time / 3600);
|
|
|
|
if (interval < 60) {
|
|
RTC_SetTimeAlarm(rtc, NULL, NULL, &second);
|
|
} else if (interval < 3600) {
|
|
RTC_SetTimeAlarm(rtc, NULL, &minute, &second);
|
|
} else {
|
|
RTC_SetTimeAlarm(rtc, &hour, &minute, &second);
|
|
}
|
|
|
|
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;
|
|
rtems_interrupt_level level;
|
|
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:
|
|
/* Enable fast startup via RTC alarm */
|
|
rtems_interrupt_disable(level);
|
|
PMC->PMC_FSMR |= PMC_FSMR_RTCAL;
|
|
rtems_interrupt_enable(level);
|
|
|
|
rtc_alarm_handler(rtc_data);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|