109 lines
3.1 KiB
C
109 lines
3.1 KiB
C
/*
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* Contiki PIC32 Port project
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*
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* Copyright (c) 2012,
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* Scuola Superiore Sant'Anna (http://www.sssup.it) and
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* Consorzio Nazionale Interuniversitario per le Telecomunicazioni
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* (http://www.cnit.it).
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*
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* 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 Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR 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, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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/**
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* \addtogroup pic32 PIC32 Contiki Port
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*
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* @{
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*/
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/**
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* \file cpu/pic32/watchdog.c
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* \brief PIC32MX Watchdog routines
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* \author Giovanni Pellerano <giovanni.pellerano@evilaliv3.org>
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* \date 2012-03-23
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*/
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#include "dev/watchdog.h"
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#include <pic32_irq.h>
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#include <p32xxxx.h>
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/*---------------------------------------------------------------------------*/
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void
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watchdog_init(void)
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{
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WDTCON = 0;
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OSCCONSET = 0x10; /* Set power mode saving to Idle */
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}
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/*---------------------------------------------------------------------------*/
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void
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watchdog_start(void)
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{
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WDTCONSET = _WDTCON_ON_MASK;
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}
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/*---------------------------------------------------------------------------*/
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void
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watchdog_periodic(void)
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{
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WDTCONSET = _WDTCON_WDTCLR_MASK;
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}
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/*---------------------------------------------------------------------------*/
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void
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watchdog_stop(void)
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{
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WDTCONCLR = _WDTCON_ON_MASK;
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}
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/*---------------------------------------------------------------------------*/
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void
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watchdog_reboot(void)
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{
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volatile int *p = (int *)&RSWRST;
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/* Unlock sequence */
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ASM_DIS_INT;
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if(!(DMACONbits.SUSPEND)){
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DMACONSET=_DMACON_SUSPEND_MASK; // suspend
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while((DMACONbits.DMABUSY)) {
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; // wait to be actually suspended
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}
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}
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SYSKEY = 0;
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SYSKEY = 0xaa996655;
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SYSKEY = 0x556699aa;
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RSWRSTSET=_RSWRST_SWRST_MASK;
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*p;
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while(1) {
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;
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}
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}
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/*---------------------------------------------------------------------------*/
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/** @} */
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