1b47aa1cb2
so the lower half driver don't need include the specific board.h Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com> Change-Id: I2ff5c30049a5c5e8ee90baea56e9f4cb1a8a4f87
143 lines
4.9 KiB
C
143 lines
4.9 KiB
C
/****************************************************************************
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* boards/arm/samd2l2/samd21-xplained/src/sam_buttons.c
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*
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* Copyright (C) 2015, 2017 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 <errno.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 <nuttx/irq.h>
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#include <arch/board/board.h>
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#include "sam_port.h"
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#include "samd21-xplained.h"
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#ifdef CONFIG_ARCH_BUTTONS
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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.
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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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uint32_t board_button_initialize(void)
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{
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sam_configport(PORT_SW0);
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return NUM_BUTTONS;
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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,
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* board_buttons() may be called to collect the state of all buttons.
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* board_buttons() returns an 32-bit bit set with each bit
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* associated with a button.
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* See the BUTTON* definitions above for the meaning of each bit
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* in the returned value.
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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 sam_portread(PORT_SW0) ? 0 : BUTTON_SW0_BIT;
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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.
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*
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* Configuration Notes:
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* Configuration CONFIG_AVR32_PORTIRQ must be selected to enable the
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* overall PORT IRQ feature and CONFIG_AVR32_PORTIRQSETA and/or
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* CONFIG_AVR32_PORTIRQSETB must be enabled to select PORTs to support
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* interrupts on. For button support, bits 2 and 3 must be set in
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* CONFIG_AVR32_PORTIRQSETB (PB2 and PB3).
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*
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****************************************************************************/
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#if defined(CONFIG_PORTA_IRQ) && defined(CONFIG_ARCH_IRQBUTTONS)
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int board_button_irq(int id, xcpt_t irqhandler, FAR void *arg)
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{
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int ret = -EINVAL;
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if (id == BUTTON_SW0)
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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 = enter_critical_section();
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/* Configure the interrupt */
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sam_portirq(IRQ_SW0);
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irq_attach(IRQ_SW0, irqhandler, arg);
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sam_portirqenable(IRQ_SW0);
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leave_critical_section(flags);
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ret = OK;
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}
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return ret;
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}
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#endif
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#endif /* CONFIG_ARCH_BUTTONS */
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