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154 lines
5.9 KiB
C
154 lines
5.9 KiB
C
/****************************************************************************
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*
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* Copyright (c) 2012-2015 PX4 Development Team. All rights reserved.
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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 PX4 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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* @file px4cannode_buttons.c
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*
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* PX4CANNODE- Buttons
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*/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <px4_config.h>
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#include <stdint.h>
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#include <nuttx/arch.h>
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#include <nuttx/board.h>
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#include <arch/board/board.h>
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#include "board_config.h"
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#ifdef CONFIG_ARCH_BUTTONS
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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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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* Public Functions
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****************************************************************************/
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void board_button_initialize(void);
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xcpt_t board_button_irq(int id, xcpt_t irqhandler);
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/****************************************************************************
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* Button support.
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*
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* Description:
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* board_button_initialize() must be called to initialize button resources.
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*
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* After board_button_initialize() has been called, board_buttons() may be
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* called to collect the state of all buttons. board_buttons() returns an
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* 8-bit bit set with each bit associated with a button.
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* See the BUTTON_*_BIT definitions in board.h for the meaning of each bit.
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*
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* board_button_irq() may be called to register an interrupt handler that
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* will be called when a button is depressed or released. The ID value is
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* a button enumeration value that uniquely identifies a button resource.
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* See the BUTTON_* definitions in board.h for the meaning of enumeration
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* value. The previous interrupt handler address is returned
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* (so that it may restored, if so desired).
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*
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****************************************************************************/
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/****************************************************************************
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* Name: board_button_initialize
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*
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* Description:
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* board_button_initialize() must be called to initialize button resources.
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* After that, board_buttons() may be called to collect the current state of
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* all buttons or board_button_irq() may be called to register button
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* interrupt handlers.
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*
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****************************************************************************/
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void board_button_initialize(void)
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{
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stm32_configgpio(BUTTON_BOOT0n);
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}
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/****************************************************************************
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* Name: board_buttons
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*
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* Description:
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*
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* After board_button_initialize() has been called, board_buttons() may be
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* called to collect the state of all buttons. board_buttons() returns an
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* 8-bit bit set with each bit associated with a button.
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* See the BUTTON_*_BIT definitions in board.h for the meaning of each bit.
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*
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****************************************************************************/
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uint32_t board_buttons(void)
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{
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return stm32_gpioread(BUTTON_BOOT0n) ? 0 : BUTTON_BOOT0_MASK;
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}
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/****************************************************************************
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* Name: board_button_irq
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*
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* Description:
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*
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* board_button_irq() may be called to register an interrupt handler that
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* will be called when a button is depressed or released. The ID value is
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* a button enumeration value that uniquely identifies a button resource.
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* See the BUTTON_* definitions in board.h for the meaning of enumeration
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* value. The previous interrupt handler address is returned
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* (so that it may restored, if so desired).
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*
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****************************************************************************/
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#ifdef CONFIG_ARCH_IRQBUTTONS
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xcpt_t board_button_irq(int id, xcpt_t irqhandler)
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{
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xcpt_t oldhandler = NULL;
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/* The following should be atomic */
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if (id == IRQBUTTON) {
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oldhandler = stm32_gpiosetevent(BUTTON_BOOT0n, true, true, true, irqhandler);
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}
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return oldhandler;
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}
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#endif
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#endif /* CONFIG_ARCH_BUTTONS */
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