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/****************************************************************************
* configs/stm32f4discovery/src/up_pmbuttons.c
* arch/arm/src/board/up_pmbuttons.c
*
* Copyright (C) 2012 Gregory Nutt. All rights reserved.
* Authors: Gregory Nutt <gnutt@nuttx.org>
* Diego Sanchez <dsanchez@nx-engineering.com>
*
* 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 <arch/board/board.h>
#include <nuttx/config.h>
#include <nuttx/power/pm.h>
#include <arch/irq.h>
#include <stdbool.h>
#include <debug.h>
#include "up_arch.h"
#include "nvic.h"
#include "stm32_pwr.h"
#include "stm32_pm.h"
#include "stm32f4discovery-internal.h"
#if defined(CONFIG_PM) && defined(CONFIG_IDLE_CUSTOM) && defined(CONFIG_PM_BUTTONS)
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
#ifndef CONFIG_ARCH_BUTTONS
# error "CONFIG_ARCH_BUTTONS is not defined in the configuration"
#endif
#ifndef CONFIG_ARCH_IRQBUTTONS
# warning "CONFIG_ARCH_IRQBUTTONS is not defined in the configuration"
#endif
#ifndef CONFIG_PM_BUTTON_ACTIVITY
# define CONFIG_PM_BUTTON_ACTIVITY 10
#endif
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
#ifdef CONFIG_ARCH_IRQBUTTONS
static int button_handler(int irq, FAR void *context);
#endif /* CONFIG_ARCH_IRQBUTTONS */
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: button_handler
*
* Description:
* Handle a button wake-up interrupt
*
****************************************************************************/
#ifdef CONFIG_ARCH_IRQBUTTONS
static int button_handler(int irq, FAR void *context)
{
/* At this point the MCU should have already awakened. The state
* change will be handled in the IDLE loop when the system is re-awakened
* The button interrupt handler should be totally ignorant of the PM
* activities and should report button activity as if nothing
* special happened.
*/
pm_activity(CONFIG_PM_BUTTON_ACTIVITY);
return OK;
}
#endif /* CONFIG_ARCH_IRQBUTTONS */
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: up_pmbuttons
*
* Description:
* Configure the user button of the STM32f4discovery board as EXTI,
* so it is able to wakeup the MCU from the PM_STANDBY mode
*
****************************************************************************/
void up_pmbuttons(void)
{
/* Initialize the button GPIOs */
up_buttoninit();
#ifdef CONFIG_ARCH_IRQBUTTONS
xcpt_t oldhandler = up_irqbutton(0, button_handler);
if (oldhandler != NULL)
{
lib_lowprintf("WARNING: oldhandler:%p is not NULL! "
"Button events may be lost or aliased!\n",
oldhandler);
}
#endif
}
#endif /* CONFIG_PM && CONFIG_IDLE_CUSTOM && CONFIG_PM_BUTTONS)*/
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