40cd67eee6
Gregory Nutt has submitted the SGA and we can migrate the licenses to Apache. Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
128 lines
4.1 KiB
C
128 lines
4.1 KiB
C
/****************************************************************************
|
|
* boards/arm/samd2l2/samd21-xplained/src/sam_buttons.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <stdint.h>
|
|
#include <errno.h>
|
|
|
|
#include <nuttx/arch.h>
|
|
#include <nuttx/board.h>
|
|
#include <nuttx/irq.h>
|
|
|
|
#include <nuttx/irq.h>
|
|
#include <arch/board/board.h>
|
|
|
|
#include "sam_port.h"
|
|
#include "samd21-xplained.h"
|
|
|
|
#ifdef CONFIG_ARCH_BUTTONS
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: board_button_initialize
|
|
*
|
|
* Description:
|
|
* board_button_initialize() must be called to initialize button resources.
|
|
* After that, board_buttons() may be called to collect the current state
|
|
* of all buttons or board_button_irq() may be called to register button
|
|
* interrupt handlers.
|
|
*
|
|
****************************************************************************/
|
|
|
|
uint32_t board_button_initialize(void)
|
|
{
|
|
sam_configport(PORT_SW0);
|
|
return NUM_BUTTONS;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: board_buttons
|
|
*
|
|
* Description:
|
|
* After board_button_initialize() has been called,
|
|
* board_buttons() may be called to collect the state of all buttons.
|
|
* board_buttons() returns an 32-bit bit set with each bit
|
|
* associated with a button.
|
|
* See the BUTTON* definitions above for the meaning of each bit
|
|
* in the returned value.
|
|
*
|
|
****************************************************************************/
|
|
|
|
uint32_t board_buttons(void)
|
|
{
|
|
return sam_portread(PORT_SW0) ? 0 : BUTTON_SW0_BIT;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: board_button_irq
|
|
*
|
|
* Description:
|
|
* This function may be called to register an interrupt handler that will
|
|
* be called when a button is depressed or released. The ID value is one
|
|
* of the BUTTON* definitions provided above.
|
|
*
|
|
* Configuration Notes:
|
|
* Configuration CONFIG_AVR32_PORTIRQ must be selected to enable the
|
|
* overall PORT IRQ feature and CONFIG_AVR32_PORTIRQSETA and/or
|
|
* CONFIG_AVR32_PORTIRQSETB must be enabled to select PORTs to support
|
|
* interrupts on. For button support, bits 2 and 3 must be set in
|
|
* CONFIG_AVR32_PORTIRQSETB (PB2 and PB3).
|
|
*
|
|
****************************************************************************/
|
|
|
|
#if defined(CONFIG_PORTA_IRQ) && defined(CONFIG_ARCH_IRQBUTTONS)
|
|
int board_button_irq(int id, xcpt_t irqhandler, FAR void *arg)
|
|
{
|
|
int ret = -EINVAL;
|
|
|
|
if (id == BUTTON_SW0)
|
|
{
|
|
irqstate_t flags;
|
|
|
|
/* Disable interrupts until we are done. This guarantees that the
|
|
* following operations are atomic.
|
|
*/
|
|
|
|
flags = enter_critical_section();
|
|
|
|
/* Configure the interrupt */
|
|
|
|
sam_portirq(IRQ_SW0);
|
|
irq_attach(IRQ_SW0, irqhandler, arg);
|
|
sam_portirqenable(IRQ_SW0);
|
|
|
|
leave_critical_section(flags);
|
|
ret = OK;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
#endif /* CONFIG_ARCH_BUTTONS */
|