contiki/cpu/cc26xx-cc13xx/rtimer-arch.h
2016-06-14 00:54:32 +03:00

75 lines
3.5 KiB
C

/*
* 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-clocks
* @{
*
* \defgroup cc26xx-rtimer CC13xx/CC26xx rtimer
*
* Implementation of the rtimer module for the CC13xx/CC26xx
* @{
*/
/**
* \file
* Header file for the CC13xx/CC26xx rtimer driver
*/
/*---------------------------------------------------------------------------*/
#ifndef RTIMER_ARCH_H_
#define RTIMER_ARCH_H_
/*---------------------------------------------------------------------------*/
#include "contiki.h"
/*---------------------------------------------------------------------------*/
#define RTIMER_ARCH_SECOND 65536
/*---------------------------------------------------------------------------*/
rtimer_clock_t rtimer_arch_now(void);
/* HW oscillator frequency is 32 kHz, not 64 kHz and RTIMER_NOW() never returns
* an odd value; so US_TO_RTIMERTICKS always rounds to the nearest even number.
*/
#define US_TO_RTIMERTICKS(US) (2 * ((US) >= 0 ? \
(((int32_t)(US) * (RTIMER_ARCH_SECOND / 2) + 500000) / 1000000L) : \
((int32_t)(US) * (RTIMER_ARCH_SECOND / 2) - 500000) / 1000000L))
#define RTIMERTICKS_TO_US(T) ((T) >= 0 ? \
(((int32_t)(T) * 1000000L + ((RTIMER_ARCH_SECOND) / 2)) / (RTIMER_ARCH_SECOND)) : \
((int32_t)(T) * 1000000L - ((RTIMER_ARCH_SECOND) / 2)) / (RTIMER_ARCH_SECOND))
/* A 64-bit version because the 32-bit one cannot handle T >= 4295 ticks.
Intended only for positive values of T. */
#define RTIMERTICKS_TO_US_64(T) ((uint32_t)(((uint64_t)(T) * 1000000 + ((RTIMER_ARCH_SECOND) / 2)) / (RTIMER_ARCH_SECOND)))
/*---------------------------------------------------------------------------*/
#endif /* RTIMER_ARCH_H_ */
/*---------------------------------------------------------------------------*/
/**
* @}
* @}
*/