nes-proj/arch/cpu/simplelink-cc13xx-cc26xx/dev/rtimer-arch.h
2018-08-31 11:06:31 +02:00

87 lines
3.5 KiB
C

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