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/****************************************************************************
* configs/sam3u-ek/src/up_leds.c
*
* Copyright (C) 2010 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <nuttx/irq.h>
#include <arch/irq.h>
#include <arch/board/board.h>
#include "sam3u_internal.h"
#include "sam3uek_internal.h"
#ifdef CONFIG_ARCH_BUTTONS
/****************************************************************************
* Definitions
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
static xcpt_t g_irqbutton1;
static xcpt_t g_irqbutton2;
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: up_buttoninit
****************************************************************************/
void up_buttoninit(void)
{
(void)sam3u_configgpio(GPIO_BUTTON1);
(void)sam3u_configgpio(GPIO_BUTTON2);
}
/****************************************************************************
* Name: up_buttons
****************************************************************************/
uint8_t up_buttons(void)
{
uint8_t retval;
retval = sam3u_gpioread(GPIO_BUTTON1) ? 0 : GPIO_BUTTON1;
retval |= sam3u_gpioread(GPIO_BUTTON2) ? 0 : GPIO_BUTTON2;
return retval;
}
/****************************************************************************
* Name: up_irqbutton1
****************************************************************************/
#ifdef CONFIG_GPIOA_IRQ
xcpt_t up_irqbutton1(xcpt_t irqhandler)
{
xcpt_t oldhandler;
irqstate_t flags;
/* Disable interrupts until we are done */
flags = irqsave();
/* Get the old button interrupt handler and save the new one */
oldhandler = g_irqbutton1;
g_irqbutton1 = irqhandler;
/* Configure the interrupt */
sam3u_gpioirq(IRQ_BUTTON1);
(void)irq_attach(IRQ_BUTTON1, irqhandler);
sam3u_gpioirqenable(IRQ_BUTTON1);
irqrestore(flags);
/* Return the old button handler (so that it can be restored) */
return oldhandler;
}
#endif
/****************************************************************************
* Name: up_irqbutton2
****************************************************************************/
#ifdef CONFIG_GPIOA_IRQ
xcpt_t up_irqbutton2(xcpt_t irqhandler)
{
xcpt_t oldhandler;
irqstate_t flags;
/* Disable interrupts until we are done */
flags = irqsave();
/* Get the old button interrupt handler and save the new one */
oldhandler = g_irqbutton2;
g_irqbutton2 = irqhandler;
/* Configure the interrupt */
sam3u_gpioirq(IRQ_BUTTON2);
(void)irq_attach(IRQ_BUTTON2, irqhandler);
sam3u_gpioirqenable(IRQ_BUTTON2);
irqrestore(flags);
/* Return the old button handler (so that it can be restored) */
return oldhandler;
}
#endif
#endif /* CONFIG_ARCH_BUTTONS */
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