157 lines
5.4 KiB
C
157 lines
5.4 KiB
C
/****************************************************************************
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* configs/pcduino-a10/src/a1x_buttons.c
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*
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* Copyright (C) 2013-2015 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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 <nuttx/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 <nuttx/irq.h>
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#include <arch/irq.h>
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#include <arch/board/board.h>
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#include "pcduino_a10.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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#ifdef CONFIG_ARCH_IRQBUTTONS
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static xcpt_t g_irqbutton[BOARD_NBUTTONS];
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#endif
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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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/****************************************************************************
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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. After
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* that, board_buttons() may be called to collect the current state of all
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* buttons or board_button_irq() may be called to register button interrupt
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* 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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# warning Missing logic
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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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* After board_button_initialize() has been called, board_buttons() may be called to
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* collect the state of all buttons. board_buttons() returns an 8-bit bit set
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* with each bit associated with a button. See the BUTTON* definitions
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* above for the meaning of each bit in the returned value.
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*
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****************************************************************************/
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uint8_t board_buttons(void)
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{
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# warning Missing logic
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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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* This function may be called to register an interrupt handler that will
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* be called when a button is depressed or released. The ID value is one
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* of the BUTTON* definitions provided above. The previous interrupt
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* handler address isreturned (so that it may restored, if so desired).
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*
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* Configuration Notes:
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* Configuration CONFIG_ARCH_IRQBUTTONS must be selected to enable the
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* overall GPIO IRQ feature.
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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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if (id < BOARD_NBUTTONS)
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{
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irqstate_t flags;
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/* Disable interrupts until we are done. This guarantees that the
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* following operations are atomic.
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*/
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flags = irqsave();
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/* Get the old button interrupt handler and save the new one */
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oldhandler = g_irqbutton[id];
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g_irqbutton[id] = irqhandler;
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/* Configure the interrupt */
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a1x_pioirq(xxx);
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(void)irq_attach(xxx, irqhandler);
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a1x_pioirqenable(xxx);
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irqrestore(flags);
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}
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/* Return the old button handler (so that it can be restored) */
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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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