nes-proj/arch/cpu/simplelink-cc13xx-cc26xx/dev/clock-arch.c

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