171 lines
4.7 KiB
C
171 lines
4.7 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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* \addtogroup nrf52832-dev Device drivers
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* @{
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*
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* \addtogroup nrf52832-clock Clock driver
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* @{
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*
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* \file
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* Software clock implementation for the nRF52.
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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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/*---------------------------------------------------------------------------*/
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#include <stdint.h>
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#include <stdbool.h>
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#include "nrf.h"
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#include "nrf_drv_config.h"
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#include "nrf_drv_rtc.h"
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#include "nrf_drv_clock.h"
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#include "nrf_delay.h"
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#include "app_error.h"
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#include "contiki.h"
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/*---------------------------------------------------------------------------*/
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const nrf_drv_rtc_t rtc = NRF_DRV_RTC_INSTANCE(PLATFORM_RTC_INSTANCE_ID); /**< RTC instance used for platform clock */
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/*---------------------------------------------------------------------------*/
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static volatile uint32_t ticks;
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void clock_update(void);
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#define TICKS (RTC1_CONFIG_FREQUENCY/CLOCK_CONF_SECOND)
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/**
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* \brief Function for handling the RTC0 interrupts
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* \param int_type Type of interrupt to be handled
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*/
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static void
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rtc_handler(nrf_drv_rtc_int_type_t int_type)
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{
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if (int_type == NRF_DRV_RTC_INT_TICK) {
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clock_update();
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}
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}
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#ifndef SOFTDEVICE_PRESENT
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/** \brief Function starting the internal LFCLK XTAL oscillator.
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*/
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static void
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lfclk_config(void)
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{
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ret_code_t err_code = nrf_drv_clock_init(NULL);
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APP_ERROR_CHECK(err_code);
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nrf_drv_clock_lfclk_request();
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}
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#endif
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/**
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* \brief Function initialization and configuration of RTC driver instance.
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*/
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static void
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rtc_config(void)
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{
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uint32_t err_code;
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//Initialize RTC instance
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err_code = nrf_drv_rtc_init(&rtc, NULL, rtc_handler);
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APP_ERROR_CHECK(err_code);
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//Enable tick event & interrupt
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nrf_drv_rtc_tick_enable(&rtc, true);
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//Power on RTC instance
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nrf_drv_rtc_enable(&rtc);
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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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ticks = 0;
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#ifndef SOFTDEVICE_PRESENT
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lfclk_config();
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#endif
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rtc_config();
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}
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/*---------------------------------------------------------------------------*/
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CCIF clock_time_t
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clock_time(void)
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{
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return (clock_time_t)(ticks & 0xFFFFFFFF);
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}
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/*---------------------------------------------------------------------------*/
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void
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clock_update(void)
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{
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ticks++;
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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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CCIF unsigned long
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clock_seconds(void)
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{
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return (unsigned long)ticks/CLOCK_CONF_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 < (clock_time_t)i) {
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__WFE();
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}
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}
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/*---------------------------------------------------------------------------*/
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void
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clock_delay_usec(uint16_t dt)
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{
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nrf_delay_us(dt);
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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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*/
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