contiki/cpu/pic32/watchdog.c

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/*
* Contiki PIC32 Port project
*
* Copyright (c) 2012,
* Scuola Superiore Sant'Anna (http://www.sssup.it) and
* Consorzio Nazionale Interuniversitario per le Telecomunicazioni
* (http://www.cnit.it).
*
* 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 pic32 PIC32 Contiki Port
*
* @{
*/
/**
* \file watchdog.c
* \brief PIC32MX Watchdog routines
* \author Giovanni Pellerano <giovanni.pellerano@evilaliv3.org>
* \date 2012-03-23
*/
#include "dev/watchdog.h"
#include <pic32_irq.h>
#include <p32xxxx.h>
/*---------------------------------------------------------------------------*/
void
watchdog_init(void)
{
WDTCON = 0;
OSCCONSET = 0x10; /* Set power mode saving to Idle */
}
/*---------------------------------------------------------------------------*/
void
watchdog_start(void)
{
WDTCONSET = _WDTCON_ON_MASK;
}
/*---------------------------------------------------------------------------*/
void
watchdog_periodic(void)
{
WDTCONSET = _WDTCON_WDTCLR_MASK;
}
/*---------------------------------------------------------------------------*/
void
watchdog_stop(void)
{
WDTCONCLR = _WDTCON_ON_MASK;
}
/*---------------------------------------------------------------------------*/
void
watchdog_reboot(void)
{
volatile int *p = (int *)&RSWRST;
/* Unlock sequence */
ASM_DIS_INT;
if(!(DMACONbits.SUSPEND)){
DMACONSET=_DMACON_SUSPEND_MASK; // suspend
while((DMACONbits.DMABUSY)) {
; // wait to be actually suspended
}
}
SYSKEY = 0;
SYSKEY = 0xaa996655;
SYSKEY = 0x556699aa;
RSWRSTSET=_RSWRST_SWRST_MASK;
*p;
while(1) {
;
}
}
/*---------------------------------------------------------------------------*/
/** @} */