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100 lines
2.0 KiB
C
100 lines
2.0 KiB
C
/*
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* Copyright (C) 2014 Thomas Eichinger <thomas.eichinger@fu-berlin.de>
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*
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* This file is subject to the terms and conditions of the GNU Lesser General
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* Public License v2.1. See the file LICENSE in the top level directory for more
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* details.
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*/
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/**
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* @defgroup driver_periph_rtt RTT
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* @ingroup driver_periph
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* @{
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*
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* @file
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* @brief Low-level RTT (Real Time Timer) peripheral driver interface
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* definitions
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*
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* @author Thomas Eichinger <thomas.eichinger@fu-berlin.de>
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*/
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#ifndef __RTT_H
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#define __RTT_H
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#include "periph_conf.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* guard file in case no RTC device was specified */
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#if RTT_NUMOF
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/**
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* @brief Signature for alarm Callback
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*
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* @param[in] arg optional argument to put the callback in the right context
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*/
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typedef void(*rtt_alarm_cb_t)(void *arg);
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/**
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* @brief Initialize RTT module
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*/
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void rtt_init(void);
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/**
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* @brief Get the current RTT counter.
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*
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* @return Current value of the RTT counter.
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*/
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uint32_t rtt_get_counter(void);
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/**
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* @brief Set the RTT counter to a specified value.
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*
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* @param[in] counter The value to set the RTT to.
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*/
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void rtt_set_counter(uint32_t counter);
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/**
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* @brief Set an alarm for RTT to the specified value.
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*
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* @param[in] alarm The value to trigger an alarm when hit.
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* @param[in] cb Callback executed when alarm is hit.
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* @param[in] arg Argument passed to callback when alarm is hit.
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*/
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void rtt_set_alarm(uint32_t alarm, rtt_alarm_cb_t cb, void *arg);
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/**
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* @brief Get the value of a set alarm.
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*
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* If no alarm is set the return value is arbitrary.
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*
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* @return value the alarm is set to
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*/
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uint32_t rtt_get_alarm(void);
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/**
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* @brief Clear any set alarm, do nothing if nothing set
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*/
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void rtt_clear_alarm(void);
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/**
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* @brief Turns the RTC hardware module on
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*/
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void rtt_poweron(void);
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/**
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* @brief Turns the RTC hardware module off
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*/
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void rtt_poweroff(void);
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#endif /* RTT_NUMOF */
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#ifdef __cplusplus
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}
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#endif
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#endif /* __RTT_H */
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/** @} */
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