145 lines
4.6 KiB
C
145 lines
4.6 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-clock CC13xx/CC26xx clock library
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*
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* @{
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* \file
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* Implementation of the clock libary 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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#include "contiki.h"
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#include "sys/etimer.h"
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/*---------------------------------------------------------------------------*/
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#include <ti/devices/DeviceFamily.h>
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#include DeviceFamily_constructPath(driverlib/aon_rtc.h)
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#include DeviceFamily_constructPath(driverlib/cpu.h)
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#include DeviceFamily_constructPath(driverlib/interrupt.h)
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#include DeviceFamily_constructPath(driverlib/prcm.h)
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#include DeviceFamily_constructPath(driverlib/timer.h)
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#include <ti/drivers/dpl/ClockP.h>
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#include <ti/drivers/dpl/HwiP.h>
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#include <ti/drivers/power/PowerCC26XX.h>
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/*---------------------------------------------------------------------------*/
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static volatile clock_time_t count;
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static ClockP_Struct etimer_clock;
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/*---------------------------------------------------------------------------*/
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static void
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clock_update_cb(void)
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{
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const uintptr_t key = HwiP_disable();
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count += 1;
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HwiP_restore(key);
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/* Notify the etimer system. */
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if(etimer_pending()) {
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etimer_request_poll();
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}
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}
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/*---------------------------------------------------------------------------*/
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static inline clock_time_t
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get_count(void)
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{
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clock_time_t count_read;
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const uintptr_t key = HwiP_disable();
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count_read = count;
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HwiP_restore(key);
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return count_read;
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}
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/*---------------------------------------------------------------------------*/
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void
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clock_init(void)
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{
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/* ClockP_getSystemTickPeriod() returns ticks per us. */
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const uint32_t clockp_ticks_second =
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(uint32_t)(1000 * 1000) / (CLOCK_SECOND) / ClockP_getSystemTickPeriod();
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count = 0;
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ClockP_Params params;
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ClockP_Params_init(¶ms);
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params.period = clockp_ticks_second;
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params.startFlag = true;
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ClockP_construct(&etimer_clock, (ClockP_Fxn)clock_update_cb,
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clockp_ticks_second, ¶ms);
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}
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/*---------------------------------------------------------------------------*/
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clock_time_t
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clock_time(void)
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{
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return get_count();
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}
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/*---------------------------------------------------------------------------*/
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unsigned long
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clock_seconds(void)
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{
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return (unsigned long)get_count() / CLOCK_SECOND;
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}
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/*---------------------------------------------------------------------------*/
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void
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clock_wait(clock_time_t i)
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{
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clock_time_t start;
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start = clock_time();
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while(clock_time() - start < i);
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}
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/*---------------------------------------------------------------------------*/
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void
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clock_delay_usec(uint16_t usec)
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{
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ClockP_usleep(usec);
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}
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/*---------------------------------------------------------------------------*/
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/**
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* \brief Obsolete delay function but we implement it here since some code
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* still uses it.
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*/
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void
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clock_delay(unsigned int i)
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{
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clock_delay_usec(i);
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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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