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/************************************************************************************
* configs/stm3210e-eval/src/stm32_watchdog.c
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 NuttX 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 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.
*
************************************************************************************/
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/config.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/timers/watchdog.h>
#include <arch/board/board.h>
#include "stm32_wdg.h"
#ifdef CONFIG_WATCHDOG
/************************************************************************************
* Pre-processor Definitions
************************************************************************************/
/* Configuration *******************************************************************/
/* Wathdog hardware should be enabled */
#if !defined(CONFIG_STM32_WWDG) && !defined(CONFIG_STM32_IWDG)
# warning "One of CONFIG_STM32_WWDG or CONFIG_STM32_IWDG must be defined"
#endif
/* Select the path to the registered watchdog timer device */
#ifndef CONFIG_STM32_WDG_DEVPATH
# ifdef CONFIG_EXAMPLES_WATCHDOG_DEVPATH
# define CONFIG_STM32_WDG_DEVPATH CONFIG_EXAMPLES_WATCHDOG_DEVPATH
# else
# define CONFIG_STM32_WDG_DEVPATH "/dev/watchdog0"
# endif
#endif
/* Use the un-calibrated LSI frequency if we have nothing better */
#if defined(CONFIG_STM32_IWDG) && !defined(CONFIG_STM32_LSIFREQ)
# define CONFIG_STM32_LSIFREQ STM32_LSI_FREQUENCY
#endif
/* Debug ***************************************************************************/
/* Non-standard debug that may be enabled just for testing the watchdog timer */
#ifndef CONFIG_DEBUG
# undef CONFIG_DEBUG_WATCHDOG
#endif
#ifdef CONFIG_DEBUG_WATCHDOG
# define wdgdbg dbg
# define wdglldbg lldbg
# ifdef CONFIG_DEBUG_VERBOSE
# define wdgvdbg vdbg
# define wdgllvdbg llvdbg
# else
# define wdgvdbg(x...)
# define wdgllvdbg(x...)
# endif
#else
# define wdgdbg(x...)
# define wdglldbg(x...)
# define wdgvdbg(x...)
# define wdgllvdbg(x...)
#endif
/************************************************************************************
* Private Functions
************************************************************************************/
/************************************************************************************
* Public Functions
************************************************************************************/
/****************************************************************************
* Name: up_wdginitialize()
*
* Description:
* Perform architecuture-specific initialization of the Watchdog hardware.
* This interface must be provided by all configurations using
* apps/examples/watchdog
*
****************************************************************************/
int up_wdginitialize(void)
{
/* Initialize tha register the watchdog timer device */
#if defined(CONFIG_STM32_WWDG)
stm32_wwdginitialize(CONFIG_STM32_WDG_DEVPATH);
return OK;
#elif defined(CONFIG_STM32_IWDG)
stm32_iwdginitialize(CONFIG_STM32_WDG_DEVPATH, CONFIG_STM32_LSIFREQ);
return OK;
#else
return -ENODEV;
#endif
}
#endif /* CONFIG_WATCHDOG */
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