87 lines
3.5 KiB
C
87 lines
3.5 KiB
C
/*
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* Copyright (c) 2018, 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 cc13xx-cc26xx-cpu
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* @{
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*
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* \defgroup cc13xx-cc26xx-rtimer The CC13xx/CC26xx rtimer
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*
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* Implementation of the rtimer module for CC13xx/CC26xx. This header
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* is included by os/sys/rtimer.h.
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*
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* RTIMER_ARCH_SECOND is defined in cc13xx-cc26xx-def.h.
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* @{
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*
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* \file
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* Header file of the rtimer driver for CC13xx/CC26xx.
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* \author
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* Edvard Pettersen <e.pettersen@ti.com>
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*/
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/*---------------------------------------------------------------------------*/
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#ifndef RTIMER_ARCH_H_
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#define RTIMER_ARCH_H_
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/*---------------------------------------------------------------------------*/
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#include "contiki.h"
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/*---------------------------------------------------------------------------*/
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rtimer_clock_t rtimer_arch_now(void);
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/*---------------------------------------------------------------------------*/
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/*
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* HW oscillator frequency is 32 kHz, not 64 kHz. And, RTIMER_NOW() never
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* returns an odd value; US_TO_RTIMERTICKS always rounds to the nearest
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* even number.
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*/
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#define US_TO_RTIMERTICKS(us) ( \
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(((us) >= 0) \
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? (((int32_t)(us) * (RTIMER_ARCH_SECOND / 2) + 500000) / 1000000L) \
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: (((int32_t)(us) * (RTIMER_ARCH_SECOND / 2) - 500000) / 1000000L) \
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) * 2)
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#define RTIMERTICKS_TO_US(rt) ( \
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((rt) >= 0) \
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? (((int32_t)(rt) * 1000000L + (RTIMER_ARCH_SECOND / 2)) / RTIMER_ARCH_SECOND) \
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: (((int32_t)(rt) * 1000000L - (RTIMER_ARCH_SECOND / 2)) / RTIMER_ARCH_SECOND) \
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)
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/*
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* A 64-bit version because the 32-bit one cannot handle T >= 4295 ticks.
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* Intended only for positive values of T.
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*/
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#define RTIMERTICKS_TO_US_64(rt) ( \
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(uint32_t)( \
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((uint64_t)(rt) * 1000000 + (RTIMER_ARCH_SECOND / 2)) / RTIMER_ARCH_SECOND \
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))
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/*---------------------------------------------------------------------------*/
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#endif /* RTIMER_ARCH_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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