153 lines
5.5 KiB
C
153 lines
5.5 KiB
C
/****************************************************************************
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* configs/stm32f4discovery/src/stm32_pm_buttons.c
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*
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* Copyright (C) 2012, 2015-2016 Gregory Nutt. All rights reserved.
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* Authors: Gregory Nutt <gnutt@nuttx.org>
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* Diego Sanchez <dsanchez@nx-engineering.com>
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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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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* 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 COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <arch/board/board.h>
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#include <nuttx/config.h>
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#include <nuttx/board.h>
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#include <nuttx/power/pm.h>
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#include <arch/irq.h>
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#include <stdbool.h>
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#include <debug.h>
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#include "up_arch.h"
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#include "nvic.h"
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#include "stm32_pwr.h"
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#include "stm32_pm.h"
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#include "stm32f4discovery.h"
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#if defined(CONFIG_PM) && defined(CONFIG_ARCH_IDLE_CUSTOM) && defined(CONFIG_PM_BUTTONS)
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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#ifndef CONFIG_ARCH_BUTTONS
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# error "CONFIG_ARCH_BUTTONS is not defined in the configuration"
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#endif
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#ifndef CONFIG_ARCH_IRQBUTTONS
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# warning "CONFIG_ARCH_IRQBUTTONS is not defined in the configuration"
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#endif
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#ifndef CONFIG_PM_BUTTON_ACTIVITY
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# define CONFIG_PM_BUTTON_ACTIVITY 10
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#endif
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#define PM_IDLE_DOMAIN 0 /* Revisit */
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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#ifdef CONFIG_ARCH_IRQBUTTONS
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static int button_handler(int irq, FAR void *context);
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#endif /* CONFIG_ARCH_IRQBUTTONS */
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: button_handler
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*
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* Description:
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* Handle a button wake-up interrupt
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*
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****************************************************************************/
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#ifdef CONFIG_ARCH_IRQBUTTONS
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static int button_handler(int irq, FAR void *context)
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{
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/* At this point the MCU should have already awakened. The state
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* change will be handled in the IDLE loop when the system is re-awakened
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* The button interrupt handler should be totally ignorant of the PM
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* activities and should report button activity as if nothing
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* special happened.
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*/
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pm_activity(PM_IDLE_DOMAIN, CONFIG_PM_BUTTON_ACTIVITY);
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return OK;
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}
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#endif /* CONFIG_ARCH_IRQBUTTONS */
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: stm32_pm_buttons
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*
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* Description:
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* Configure the user button of the STM32f4discovery board as EXTI,
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* so it is able to wakeup the MCU from the PM_STANDBY mode
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*
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****************************************************************************/
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void stm32_pm_buttons(void)
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{
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/* Initialize the button GPIOs */
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board_button_initialize();
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#ifdef CONFIG_ARCH_IRQBUTTONS
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xcpt_t oldhandler = board_button_irq(0, button_handler);
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if (oldhandler != NULL)
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{
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lowsyslog(LOG_WARNING, "WARNING: oldhandler:%p is not NULL! "
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"Button events may be lost or aliased!\n",
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oldhandler);
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}
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#endif
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}
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#endif /* CONFIG_PM && CONFIG_ARCH_IDLE_CUSTOM && CONFIG_PM_BUTTONS)*/
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