nes-proj/arch/cpu/nrf52832/dev/watchdog.c

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2016-01-09 13:44:18 +00:00
/*
* Copyright (c) 2015, Nordic Semiconductor
* 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 Institute 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 INSTITUTE 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 INSTITUTE 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 nrf52832-dev Device drivers
* @{
*
* \addtogroup nrf52832-watchdog Watchdog driver
* @{
*
* \file
* Contiki compatible watchdog driver implementation.
* \author
* Wojciech Bober <wojciech.bober@nordicsemi.no>
*/
#include <nrf_drv_wdt.h>
#include "app_error.h"
#include "contiki.h"
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static nrf_drv_wdt_channel_id wdt_channel_id;
static uint8_t wdt_initialized = 0;
/**
* \brief WDT events handler.
*/
static void wdt_event_handler(void)
{
LEDS_OFF(LEDS_MASK);
}
/*---------------------------------------------------------------------------*/
void
watchdog_init(void)
{
ret_code_t err_code;
err_code = nrf_drv_wdt_init(NULL, &wdt_event_handler);
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_wdt_channel_alloc(&wdt_channel_id);
APP_ERROR_CHECK(err_code);
wdt_initialized = 1;
}
/*---------------------------------------------------------------------------*/
void
watchdog_start(void)
{
if(wdt_initialized) {
nrf_drv_wdt_enable();
}
}
/*---------------------------------------------------------------------------*/
void
watchdog_periodic(void)
{
if(wdt_initialized) {
nrf_drv_wdt_channel_feed(wdt_channel_id);
}
}
/*---------------------------------------------------------------------------*/
void
watchdog_reboot(void)
{
NVIC_SystemReset();
}
/**
* @}
* @}
*/