nes-proj/cpu/cc26xx/rtimer-arch.c

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2015-02-25 12:09:56 +00:00
/*
* Copyright (c) 2014, Texas Instruments Incorporated - http://www.ti.com/
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*---------------------------------------------------------------------------*/
/**
* \addtogroup cc26xx-rtimer
* @{
*
* \file
* Implementation of the arch-specific rtimer functions for the cc26xx
*
*/
/*---------------------------------------------------------------------------*/
#include "contiki.h"
#include "sys/energest.h"
#include "sys/rtimer.h"
#include "cpu.h"
#include "dev/cc26xx-rtc.h"
#include "ti-lib.h"
#include <stdint.h>
/*---------------------------------------------------------------------------*/
/**
* \brief We don't need to do anything special here. The RTC is initialised
* elsewhere
*/
void
rtimer_arch_init(void)
{
return;
}
/*---------------------------------------------------------------------------*/
/**
* \brief Schedules an rtimer task to be triggered at time t
* \param t The time when the task will need executed.
*
* \e t is an absolute time, in other words the task will be executed AT
* time \e t, not IN \e t rtimer ticks.
*
* This function schedules a one-shot event with the AON RTC.
*
* This functions converts \e to a value suitable for the AON RTC.
*/
void
rtimer_arch_schedule(rtimer_clock_t t)
{
/* Convert the rtimer tick value to a value suitable for the AON RTC */
cc26xx_rtc_schedule_one_shot(t);
}
/*---------------------------------------------------------------------------*/
/**
* \brief Returns the current real-time clock time
* \return The current rtimer time in ticks
*
* The value is read from the AON RTC counter and converted to a number of
* rtimer ticks
*
*/
rtimer_clock_t
rtimer_arch_now()
{
return ti_lib_aon_rtc_current_compare_value_get();
}
/*---------------------------------------------------------------------------*/
/** @} */