/* Copyright (c) 2002, 2004 Marek Michalkiewicz
Copyright (c) 2005, 2006, 2007 Eric B. Weddington
Copyright (c) 2016 Frank Holtz
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* 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.
* Neither the name of the copyright holders nor the names of
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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. */
/* $Id$ */
/*
avr/wdt.h - macros for AVR watchdog timer
*/
#ifndef _NRF5_WDT_H_
#define _NRF5_WDT_H_
#include <nrf.h>
#include <stdint.h>
/** \file */
/** \defgroup avr_watchdog <avr/wdt.h>: Watchdog timer handling
\code #include <avr/wdt.h> \endcode
@ingroup internals
This header file declares the interface to some inline macros
handling the watchdog timer like present in many AVR devices.
In order to prevent the watchdog timer configuration from being
accidentally altered by a crashing application, a special timed
sequence is required in order to change it. The macros within
this header file handle the required sequence automatically
before changing any value. Interrupts will be disabled during
the manipulation.
*/
/**
\ingroup avr_watchdog
Reset the watchdog timer. When the watchdog timer is enabled,
a call to this instruction is required before the timer expires,
otherwise a watchdog-initiated device reset will occur.
*/
#define wdt_reset() NRF_WDT->RR[0] = WDT_RR_RR_Reload
/**
\ingroup avr_watchdog
Enable the watchdog timer, configuring it for expiry after
\c timeout (ms).
The WDT is running in sleep mode.
See also the symbolic constants \c WDTO_15MS et al.
*/
#define wdt_enable(timeout) \
NRF_WDT->CONFIG = NRF_WDT->CONFIG = (WDT_CONFIG_HALT_Pause << WDT_CONFIG_HALT_Pos) | ( WDT_CONFIG_SLEEP_Run << WDT_CONFIG_SLEEP_Pos); \
NRF_WDT->CRV = (32768*timeout)/1000; \
NRF_WDT->RREN |= WDT_RREN_RR0_Msk; \
NRF_WDT->TASKS_START = 1
/**
\ingroup avr_watchdog
Disable the watchdog timer. On nRF5 the timer cannot disabled.
The period is set to 36h of CPU run time. The WDT is stopped in sleep mode.
*/
#define wdt_disable() \
NRF_WDT->CONFIG = NRF_WDT->CONFIG = (WDT_CONFIG_HALT_Pause << WDT_CONFIG_HALT_Pos) | ( WDT_CONFIG_SLEEP_Pause << WDT_CONFIG_SLEEP_Pos); \
NRF_WDT->CRV = 4294967295
/**
\ingroup avr_watchdog
Symbolic constants for the watchdog timeout.
Possible timeout values are: 15 ms, 30 ms, 60 ms, 120 ms, 250 ms,
500 ms, 1 s, 2 s, 4s, 8s. (Not all devices allow 4 s or 8 s.)
Symbolic constants are formed by the prefix
\c WDTO_, followed by the time.
Example that would select a watchdog timer expiry of approximately
500 ms:
\code
wdt_enable(WDTO_500MS);
\endcode
*/
#define WDTO_15MS 15
/** \ingroup avr_watchdog
See \c WDTO_15MS */
#define WDTO_30MS 30
/** \ingroup avr_watchdog
See \c WDTO_15MS */
#define WDTO_60MS 60
/** \ingroup avr_watchdog
See \c WDTO_15MS */
#define WDTO_120MS 120
/** \ingroup avr_watchdog
See \c WDTO_15MS */
#define WDTO_250MS 250
/** \ingroup avr_watchdog
See \c WDTO_15MS */
#define WDTO_500MS 500
/** \ingroup avr_watchdog
See \c WDTO_15MS */
#define WDTO_1S 1000
/** \ingroup avr_watchdog
See \c WDTO_15MS */
#define WDTO_2S 2000
/** \ingroup avr_watchdog
See \c WDTO_15MS
Note: This is only available on the
ATtiny2313,
ATtiny24, ATtiny44, ATtiny84, ATtiny84A,
ATtiny25, ATtiny45, ATtiny85,
ATtiny261, ATtiny461, ATtiny861,
ATmega48, ATmega88, ATmega168,
ATmega48P, ATmega88P, ATmega168P, ATmega328P,
ATmega164P, ATmega324P, ATmega644P, ATmega644,
ATmega640, ATmega1280, ATmega1281, ATmega2560, ATmega2561,
ATmega8HVA, ATmega16HVA, ATmega32HVB,
ATmega406, ATmega1284P,
AT90PWM1, AT90PWM2, AT90PWM2B, AT90PWM3, AT90PWM3B, AT90PWM216, AT90PWM316,
AT90PWM81, AT90PWM161,
AT90USB82, AT90USB162,
AT90USB646, AT90USB647, AT90USB1286, AT90USB1287,
ATtiny48, ATtiny88,
nRF51822, nRF52832
*/
#define WDTO_4S 4000
/** \ingroup avr_watchdog
See \c WDTO_15MS
Note: This is only available on the
ATtiny2313,
ATtiny24, ATtiny44, ATtiny84, ATtiny84A,
ATtiny25, ATtiny45, ATtiny85,
ATtiny261, ATtiny461, ATtiny861,
ATmega48, ATmega48A, ATmega48PA, ATmega88, ATmega168,
ATmega48P, ATmega88P, ATmega168P, ATmega328P,
ATmega164P, ATmega324P, ATmega644P, ATmega644,
ATmega640, ATmega1280, ATmega1281, ATmega2560, ATmega2561,
ATmega8HVA, ATmega16HVA, ATmega32HVB,
ATmega406, ATmega1284P,
ATmega2564RFR2, ATmega256RFR2, ATmega1284RFR2, ATmega128RFR2, ATmega644RFR2, ATmega64RFR2
AT90PWM1, AT90PWM2, AT90PWM2B, AT90PWM3, AT90PWM3B, AT90PWM216, AT90PWM316,
AT90PWM81, AT90PWM161,
AT90USB82, AT90USB162,
AT90USB646, AT90USB647, AT90USB1286, AT90USB1287,
ATtiny48, ATtiny88,
ATxmega16a4u, ATxmega32a4u,
ATxmega16c4, ATxmega32c4,
ATxmega128c3, ATxmega192c3, ATxmega256c3,
nRF51822, nRF52832
*/
#define WDTO_8S 8000
#endif /* _NRF5_WDT_H_ */