8cc0bb8a1e
Since avr-libc 1.8.0 MCUSR is marked as poison as it was replaced by the correct name MCUCSR. Thus code still using the old MCUSR name does not compile anymore. This commit replaces usages of former MCUSR by its new name MCUCSR and modifies the alias fallback accordingly.
140 lines
4.5 KiB
C
140 lines
4.5 KiB
C
/*
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* Copyright (c) 2005, Swedish Institute of Computer Science
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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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* This file is part of the Contiki operating system.
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*
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*/
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/* Watchdog routines for the AVR */
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/* The default timeout of 2 seconds works on most MCUs.
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* It should be disabled during sleep (unless used for wakeup) since
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* it draws significant current (~5 uamp on 1284p, 20x the MCU consumption).
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*
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* Note the wdt is not properly simulated in AVR Studio 4 Simulator 1:
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* On many devices calls to wdt_reset will have no effect, and a wdt reboot will occur.
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* The MCUSR will not show the cause of a wdt reboot.
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* A 1MHz clock is assumed; at 8MHz timeout occurs 8x faster than it should.
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* Simulator 2 is supposed to work on supported devices (not atmega128rfa1),
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* but neither it nor Studio 5 beta do any resets on the 1284p.
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*
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* Setting WATCHDOG_CONF_TIMEOUT -1 will disable the WDT.
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*/
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//#define WATCHDOG_CONF_TIMEOUT -1
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#ifndef WATCHDOG_CONF_TIMEOUT
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#define WATCHDOG_CONF_TIMEOUT WDTO_2S
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#endif
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/* While balancing start and stop calls is a good idea, an imbalance will cause
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* resets that can take a lot of time to track down.
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* Some low power protocols may cause this.
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* The default is no balance; define WATCHDOG_CONF_BALANCE 1 to override.
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*/
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#ifndef WATCHDOG_CONF_BALANCE
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#define WATCHDOG_CONF_BALANCE 0
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#endif
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#include "dev/watchdog.h"
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#include <avr/wdt.h>
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#include <avr/interrupt.h>
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/* MCUSR is a deprecated name but older avr-libc versions may define it */
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#if !defined (MCUCSR)
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# if defined (MCUSR)
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# warning *** MCUCSR not defined, using MCUSR instead ***
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# define MCUCSR MCUSR
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# endif
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#endif
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#if WATCHDOG_CONF_BALANCE && WATCHDOG_CONF_TIMEOUT >= 0
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static int stopped = 0;
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#endif
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/*---------------------------------------------------------------------------*/
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void
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watchdog_init(void)
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{
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/* Clear startup bit and disable the wdt, whether or not it will be used.
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Random code may have caused the last reset.
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*/
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MCUCSR&=~(1<<WDRF);
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wdt_disable();
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#if WATCHDOG_CONF_BALANCE && WATCHDOG_CONF_TIMEOUT >= 0
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stopped = 1;
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#endif
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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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#if WATCHDOG_CONF_TIMEOUT >= 0
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#if WATCHDOG_CONF_BALANCE
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stopped--;
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if(!stopped)
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#endif
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wdt_enable(WATCHDOG_CONF_TIMEOUT);
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#endif
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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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#if WATCHDOG_CONF_TIMEOUT >= 0
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#if WATCHDOG_CONF_BALANCE
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if(!stopped)
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#endif
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wdt_reset();
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#endif
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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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#if WATCHDOG_CONF_TIMEOUT >= 0
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#if WATCHDOG_CONF_BALANCE
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stopped++;
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#endif
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wdt_disable();
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#endif
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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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cli();
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wdt_enable(WDTO_15MS); //wd on,250ms
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while(1); //loop
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}
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/*---------------------------------------------------------------------------*/
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#if 0
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/* Not all AVRs implement the wdt interrupt */
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ISR(WDT_vect)
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{
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}
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#endif
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