nes-proj/arch/cpu/simplelink-cc13xx-cc26xx/dev/watchdog-arch.c
2018-08-31 11:06:31 +02:00

145 lines
4.3 KiB
C

/*
* Copyright (c) 2018, Texas Instruments Incorporated - http://www.ti.com/
* 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 copyright holder 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 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 HOLDER 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 cc13xx-cc26xx-cpu
* @{
*
* \defgroup cc13xx-cc26xx-watchdog CC13xx/CC26xx watchdog timer driver
*
* Driver for the CC13xx/CC26xx Watchdog Timer
*
* This file is not called watchdog.c because the filename is in use by
* TI CC26xxware/CC13xxware
* @{
*
* \file
* Implementation of the CC13xx/CC26xx watchdog driver.
*/
/*---------------------------------------------------------------------------*/
#include "contiki.h"
#include "dev/watchdog.h"
/*---------------------------------------------------------------------------*/
#include <Board.h>
#include <ti/drivers/Watchdog.h>
/*---------------------------------------------------------------------------*/
#include <stdbool.h>
#include <stdint.h>
/*---------------------------------------------------------------------------*/
#define WATCHDOG_DISABLE WATCHDOG_CONF_DISABLE
#define WATCHDOG_TIMER_TOP WATCHDOG_CONF_TIMER_TOP
/*---------------------------------------------------------------------------*/
static Watchdog_Handle wdt_handle;
/*---------------------------------------------------------------------------*/
/**
* \brief Initialises the Watchdog module.
*
* Simply sets the reload counter to a default value. The WDT is not
* started yet. To start it, watchdog_start() must be called.
*/
void
watchdog_init(void)
{
if(WATCHDOG_DISABLE) {
return;
}
Watchdog_init();
Watchdog_Params wdt_params;
Watchdog_Params_init(&wdt_params);
wdt_params.resetMode = Watchdog_RESET_ON;
wdt_params.debugStallMode = Watchdog_DEBUG_STALL_ON;
wdt_handle = Watchdog_open(Board_WATCHDOG0, &wdt_params);
}
/*---------------------------------------------------------------------------*/
/**
* \brief Start the Watchdog.
*/
void
watchdog_start(void)
{
if(WATCHDOG_DISABLE) {
return;
}
watchdog_periodic();
}
/*---------------------------------------------------------------------------*/
/**
* \brief Refresh (feed) the Watchdog.
*/
void
watchdog_periodic(void)
{
if(WATCHDOG_DISABLE) {
return;
}
Watchdog_setReload(wdt_handle, WATCHDOG_TIMER_TOP);
}
/*---------------------------------------------------------------------------*/
/**
* \brief Stop the Watchdog such that it won't timeout and cause a
* system reset.
*/
void
watchdog_stop(void)
{
if(WATCHDOG_DISABLE) {
return;
}
Watchdog_clear(wdt_handle);
}
/*---------------------------------------------------------------------------*/
/**
* \brief Manually trigger a Watchdog timeout.
*/
void
watchdog_reboot(void)
{
if(WATCHDOG_DISABLE) {
return;
}
watchdog_start();
/* Busy loop until watchdog times out */
for (;;) { /* hang */ }
}
/*---------------------------------------------------------------------------*/
/**
* @}
* @}
*/