mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-12-23 01:29:33 +00:00
82 lines
2.9 KiB
C
82 lines
2.9 KiB
C
/*
|
|
* Copyright (c) 2010, Loughborough University - Computer Science
|
|
* 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
|
|
* Hardware-dependent functions for the cc253x watchdog.
|
|
*
|
|
* This file contains an ISR and must reside in the HOME bank.
|
|
*
|
|
* \author
|
|
* George Oikonomou - <oikonomou@users.sourceforge.net>
|
|
*/
|
|
|
|
#include "cc253x.h"
|
|
#include "sfr-bits.h"
|
|
#include "contiki-conf.h"
|
|
|
|
#define WDT_TIMEOUT_MIN (WDCTL_INT1 | WDCTL_INT0)
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
watchdog_init(void)
|
|
{
|
|
WDCTL = 0; /* IDLE, Max Interval */
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
watchdog_start(void)
|
|
{
|
|
WDCTL |= WDCTL_MODE1; /* Start in Watchdog mode */
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
watchdog_periodic(void)
|
|
{
|
|
/* Write the 'clear' sequence while maintaining mode and interval setting */
|
|
WDCTL = (WDCTL & 0x0F) | WDCTL_CLR3 | WDCTL_CLR1;
|
|
WDCTL = (WDCTL & 0x0F) | WDCTL_CLR2 | WDCTL_CLR0;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void
|
|
watchdog_reboot(void)
|
|
{
|
|
WDCTL = WDT_TIMEOUT_MIN;
|
|
/* Dis-acknowledge all interrupts while we wait for the dog to bark */
|
|
DISABLE_INTERRUPTS();
|
|
|
|
WDCTL |= WDCTL_MODE1; /* Just in case it's not started... */
|
|
|
|
/* NOP till the dog barks... */
|
|
while(1) {
|
|
ASM(nop);
|
|
}
|
|
}
|