nes-proj/arch/platform/jn516x/dev/watchdog.c

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2015-09-21 08:57:54 +00:00
/*
* Copyright (c) 2014, SICS Swedish ICT.
* 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.
*
* This file is part of the Contiki operating system.
*
*/
/**
* \file
* JN516X watchdog support.
* \author
* Beshr Al Nahas <beshr@sics.se>
*
*/
#include "dev/watchdog.h"
#include "AppHardwareApi.h"
/*---------------------------------------------------------------------------*/
static int counter = 0;
/*---------------------------------------------------------------------------*/
void
watchdog_init(void)
{
counter = 0;
watchdog_stop();
/* enable WDT interrupt */
vAHI_WatchdogException(1);
}
/*---------------------------------------------------------------------------*/
void
watchdog_start(void)
{
/* We setup the watchdog to reset the device after two seconds,
unless watchdog_periodic() is called. */
counter--;
if(counter == 0) {
vAHI_WatchdogStart(9); /* about 8*2^(9-1)ms=2.048s timeout */
}
}
/*---------------------------------------------------------------------------*/
void
watchdog_periodic(void)
{
/* This function is called periodically to restart the watchdog
timer. */
vAHI_WatchdogRestart();
}
/*---------------------------------------------------------------------------*/
void
watchdog_stop(void)
{
counter++;
if(counter == 1) {
vAHI_WatchdogStop();
}
}
/*---------------------------------------------------------------------------*/
void
watchdog_reboot(void)
{
vAHI_SwReset();
}
/*---------------------------------------------------------------------------*/