101 lines
3.8 KiB
C
101 lines
3.8 KiB
C
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/*
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* Copyright (c) 2014, Texas Instruments Incorporated - http://www.ti.com/
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \addtogroup cc26xx
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* @{
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*
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* \defgroup cc26xx-clocks CC26xx clock and timer subsystem
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*
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* For the CC26xx cpu we use the AON RTC as the basis for all clocks and timers
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*
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* We configure the AON RTC's channel 2 to run in continuous mode, generating
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* 128 interrupts / second. In continuous mode, the next compare event is
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* scheduled by the hardware automatically; the events are equidistant and
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* this also means we don't need the overhead of re-scheduling within the
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* interrupt handler
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*
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* For rtimers, we use the RTC's channel 0 in one-shot compare mode. When the
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* compare event fires, we call rtimer_run_next
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*
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* The RTC runs in all power modes except 'shutdown'
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*
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* \sa cpu/cc26xx/clock.c cpu/cc26xx/rtimer-arch.c
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* @{
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*
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* \defgroup cc26xx-rtc CC26xx AON RTC driver
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*
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* Underpins the platform's software clocks and timers
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*
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* @{
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* \file
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* Header file for the CC26XX AON RTC driver
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*/
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#ifndef CC26XX_RTC_H_
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#define CC26XX_RTC_H_
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/*---------------------------------------------------------------------------*/
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#include "contiki.h"
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#include "rtimer.h"
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#include <stdint.h>
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/*---------------------------------------------------------------------------*/
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/**
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* \brief Initialise the CC26XX AON RTC module
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*
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* This timer configures the AON RTC's channel 2 to run in continuous mode
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* This function must be called before clock_init() and rtimer_init()
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*/
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void cc26xx_rtc_init(void);
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/**
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* \brief Return the time of the next scheduled rtimer event
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* \return The time at which the next rtimer event is due to fire
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*
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* This function will check both AON RTC channels and will only take CH0's
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* compare into account if the channel is actually enabled
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*/
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rtimer_clock_t cc26xx_rtc_get_next_trigger(void);
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/**
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* \brief Schedule an AON RTC channel 0 one-shot compare event
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* \param t The time when the event will be fired. This is an absolute
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* time, in other words the event will fire AT time \e t,
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* not IN \e t ticks
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*/
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void cc26xx_rtc_schedule_one_shot(uint32_t t);
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/*---------------------------------------------------------------------------*/
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#endif /* CC26XX_RTC_H_ */
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/*---------------------------------------------------------------------------*/
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/**
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* @}
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* @}
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* @}
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*/
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