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89 lines
1.7 KiB
C
89 lines
1.7 KiB
C
/*
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* Copyright (C) 2014 PHYTEC Messtechnik GmbH
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* Copyright (C) 2015 Eistec AB
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup cpu_kinetis
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* @ingroup drivers_periph_rtt
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*
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* @{
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*
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* @file
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* @author Johann Fischer <j.fischer@phytec.de>
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* @author Joakim Nohlgård <joakim.nohlgard@eistec.se>
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*
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* @}
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*/
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#include <time.h>
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#include "cpu.h"
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#include "bit.h"
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#include "periph/rtt.h"
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#include "periph/timer.h"
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#include "periph_conf.h"
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#define ENABLE_DEBUG 0
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#include "debug.h"
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static rtt_cb_t alarm_cb = NULL; /**< callback called from RTC alarm */
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static void *alarm_arg = NULL; /**< argument passed to the callback */
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static uint32_t alarm_value = 0;
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static void _rtt_cb(void *arg, int channel)
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{
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(void) arg;
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(void) channel;
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if (alarm_cb != NULL) {
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alarm_cb(alarm_arg);
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}
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}
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void rtt_init(void)
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{
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timer_init(RTT_DEV, RTT_FREQUENCY, _rtt_cb, NULL);
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}
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uint32_t rtt_get_counter(void)
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{
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return timer_read(RTT_DEV);
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}
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void rtt_set_alarm(uint32_t alarm, rtt_cb_t cb, void *arg)
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{
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unsigned state = irq_disable();
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alarm_arg = arg;
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alarm_cb = cb;
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alarm_value = alarm;
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timer_set_absolute(RTT_DEV, 0, alarm & RTT_MAX_VALUE);
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irq_restore(state);
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}
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uint32_t rtt_get_alarm(void)
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{
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return alarm_value;
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}
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void rtt_clear_alarm(void)
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{
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unsigned state = irq_disable();
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alarm_cb = NULL;
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alarm_arg = NULL;
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timer_clear(RTT_DEV, 0);
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irq_restore(state);
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}
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void rtt_poweron(void)
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{
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timer_start(RTT_DEV);
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}
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void rtt_poweroff(void)
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{
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timer_stop(RTT_DEV);
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}
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