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/*
* Copyright 2008-2010, Freie Universitaet Berlin (FUB). All rights reserved.
* Copyright 2014 INRIA
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
#include <sys/time.h>
#include <stdint.h>
#include <string.h>
#include "kernel_types.h"
/* cpu */
#include "periph/rtc.h"
#include "VIC.h"
#include "lpc2387.h"
#include "lpm.h"
#define ENABLE_DEBUG (0)
#include "debug.h"
/* Alarm callback */
static rtc_alarm_cb_t _cb;
/* Argument to alarm callback */
static void *_cb_arg;
/* internal function to set time based on time_t */
static void _rtc_set(time_t time);
void RTC_IRQHandler(void) __attribute__((interrupt("IRQ")));
void rtc_init(void)
{
PCONP |= BIT9;
RTC_AMR = 0xff; /* disable alarm irq */
RTC_CIIR = 0; /* disable increase irq */
RTC_CISS = 0; /* disable subsecond irq */
INTWAKE |= BIT15; /* rtc irq wakes up mcu from power down */
RTC_CCR = CCR_CLKSRC; /* Clock from external 32 kHz Osc. */
/* initialize clock with valid unix compatible values
* If RTC_YEAR contains an value larger unix time_t we must reset. */
if (RTC_YEAR > 2037) {
_rtc_set(0);
}
DEBUG("%2lu.%2lu.%4lu %2lu:%2lu:%2lu\n",
RTC_DOM, RTC_MONTH, RTC_YEAR, RTC_HOUR, RTC_MIN, RTC_SEC);
}
/**
* @brief Sets the current time in broken down format directly from to RTC
* @param[in] localt Pointer to structure with time to set
*/
int rtc_set_time(struct tm *localt)
{
if (localt == NULL) {
return -1;
}
/* set clock */
RTC_SEC = localt->tm_sec;
RTC_MIN = localt->tm_min;
RTC_HOUR = localt->tm_hour;
RTC_DOM = localt->tm_mday;
RTC_DOW = localt->tm_wday;
RTC_DOY = localt->tm_yday;
RTC_MONTH = localt->tm_mon + 1;
RTC_YEAR = localt->tm_year;
return 0;
}
int rtc_get_time(struct tm *localt)
{
if (localt != NULL) {
localt->tm_sec = RTC_SEC;
localt->tm_min = RTC_MIN;
localt->tm_hour = RTC_HOUR;
localt->tm_mday = RTC_DOM;
localt->tm_wday = RTC_DOW;
localt->tm_yday = RTC_DOY;
localt->tm_mon = RTC_MONTH - 1;
localt->tm_year = RTC_YEAR;
localt->tm_isdst = -1; /* not available */
return 0;
}
return -1;
}
int rtc_set_alarm(struct tm *localt, rtc_alarm_cb_t cb, void *arg)
{
(void) arg;
if (localt != NULL) {
RTC_ALSEC = localt->tm_sec;
RTC_ALMIN = localt->tm_min;
RTC_ALHOUR = localt->tm_hour;
RTC_ALDOM = localt->tm_mday;
RTC_ALDOW = localt->tm_wday;
RTC_ALDOY = localt->tm_yday;
RTC_ALMON = localt->tm_mon + 1;
RTC_ALYEAR = localt->tm_year;
RTC_AMR = 0; /* set wich alarm fields to check */
DEBUG("alarm set %2lu.%2lu.%4lu %2lu:%2lu:%2lu\n",
RTC_ALDOM, RTC_ALMON, RTC_ALYEAR, RTC_ALHOUR, RTC_ALMIN, RTC_ALSEC);
_cb = cb;
return 0;
}
else if (cb == NULL) {
return -1;
}
RTC_AMR = 0xff;
return -2;
}
int rtc_get_alarm(struct tm *localt)
{
if (localt != NULL) {
localt->tm_sec = RTC_ALSEC;
localt->tm_min = RTC_ALMIN;
localt->tm_hour = RTC_ALHOUR;
localt->tm_mday = RTC_ALDOM;
localt->tm_wday = RTC_ALDOW;
localt->tm_yday = RTC_ALDOY;
localt->tm_mon = RTC_ALMON - 1;
localt->tm_year = RTC_ALYEAR;
localt->tm_isdst = -1; /* not available */
return 0;
}
return -1;
}
void rtc_clear_alarm(void)
{
RTC_AMR = 0xff;
}
void rtc_poweron(void)
{
PCONP |= BIT9;
RTC_ILR = (ILR_RTSSF | ILR_RTCCIF | ILR_RTCALF); /* clear interrupt flags */
RTC_CCR |= CCR_CLKEN; /* enable clock */
install_irq(RTC_INT, &RTC_IRQHandler, IRQP_RTC); /* install interrupt handler */
}
void rtc_poweroff(void)
{
RTC_CCR &= ~CCR_CLKEN; /* disable clock */
install_irq(RTC_INT, NULL, 0);
RTC_ILR = 0;
PCONP &= ~BIT9;
}
void RTC_IRQHandler(void)
{
lpm_begin_awake();
if (RTC_ILR & ILR_RTSSF) {
/* sub second interrupt (does not need flag-clearing) */
}
else if (RTC_ILR & ILR_RTCCIF) {
/* counter increase interrupt */
}
else if (RTC_ILR & ILR_RTCALF) {
RTC_ILR |= ILR_RTCALF;
RTC_AMR = 0xff; /* disable alarm irq */
if (_cb) {
_cb(_cb_arg);
}
DEBUG("Ring\n");
lpm_end_awake();
}
VICVectAddr = 0; /* Acknowledge Interrupt */
}
static void _rtc_set(time_t time)
{
struct tm *localt;
localt = localtime(&time); /* convert seconds to broken-down time */
rtc_set_time(localt);
}
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