110 lines
3.6 KiB
C
110 lines
3.6 KiB
C
/*
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* Copyright (c) 2015 Nordic Semiconductor. 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 nrf52832
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* @{
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*
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* \file
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* Implementation of the architecture dependent rtimer functions for the nRF52
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*
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* \author
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* Wojciech Bober <wojciech.bober@nordicsemi.no>
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*/
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/*---------------------------------------------------------------------------*/
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#include <stdint.h>
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#include <stddef.h>
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#include "nrf.h"
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#include "nrf_drv_timer.h"
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#include "app_error.h"
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#include "contiki.h"
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static const nrf_drv_timer_t timer = NRF_DRV_TIMER_INSTANCE(PLATFORM_TIMER_INSTANCE_ID); /**< Timer instance used for rtimer */
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/**
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* \brief Handler for timer events.
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*
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* \param event_type type of an event that should be handled
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* \param p_context opaque data pointer passed from nrf_drv_timer_init()
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*/
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static void
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timer_event_handler(nrf_timer_event_t event_type, void* p_context)
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{
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switch (event_type) {
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case NRF_TIMER_EVENT_COMPARE1:
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rtimer_run_next();
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break;
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default:
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//Do nothing.
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break;
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}
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}
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/*---------------------------------------------------------------------------*/
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/**
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* \brief Initialize platform rtimer
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*/
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void
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rtimer_arch_init(void)
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{
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ret_code_t err_code = nrf_drv_timer_init(&timer, NULL, timer_event_handler);
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APP_ERROR_CHECK(err_code);
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nrf_drv_timer_enable(&timer);
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}
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/*---------------------------------------------------------------------------*/
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/**
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* \brief Schedules an rtimer task to be triggered at time t
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* \param t The time when the task will need executed.
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*
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* \e t is an absolute time, in other words the task will be executed AT
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* time \e t, not IN \e t rtimer ticks.
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*
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* This function schedules a one-shot event with the nRF RTC.
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*/
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void
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rtimer_arch_schedule(rtimer_clock_t t)
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{
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nrf_drv_timer_compare(&timer, NRF_TIMER_CC_CHANNEL1, t, true);
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}
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/*---------------------------------------------------------------------------*/
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/**
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* \brief Returns the current real-time clock time
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* \return The current rtimer time in ticks
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*
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*/
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rtimer_clock_t
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rtimer_arch_now()
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{
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return nrf_drv_timer_capture(&timer, NRF_TIMER_CC_CHANNEL0);
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}
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/*---------------------------------------------------------------------------*/
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/**
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* @}
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*/
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