123 lines
4.1 KiB
C
123 lines
4.1 KiB
C
/****************************************************************************
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* boards/arm/stm32/stm32f4discovery/src/stm32_pmbuttons.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <stdbool.h>
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#include <debug.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 "arm_internal.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 Function Prototypes
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****************************************************************************/
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#ifdef CONFIG_ARCH_IRQBUTTONS
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static int button_handler(int irq, void *context, void *arg);
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#endif /* CONFIG_ARCH_IRQBUTTONS */
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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, void *context, void *arg)
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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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board_button_irq(0, button_handler, NULL);
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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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