/*****************************************************************************
 *
 * \file
 *
 * \brief EIC driver for AVR32 UC3.
 *
 * AVR32 External Interrupt Controller driver module.
 *
 * Copyright (c) 2009-2011 Atmel Corporation. All rights reserved.
 *
 * \asf_license_start
 *
 * \page License
 *
 * 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. The name of Atmel may not be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * 4. This software may only be redistributed and used in connection with an
 *    Atmel microcontroller product.
 *
 * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
 * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL 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.
 *
 * \asf_license_stop
 *
 ******************************************************************************/


#ifndef _EIC_H_
#define _EIC_H_

/**
 * \defgroup group_avr32_drivers_eic MEMORY - EIC - External Interrupt Controller
 *
 * EIC allows pins to be configured as external interrupts.
 *
 * \{
 */

#include "compiler.h"

/*! \name External Interrupt lines
 */
//! @{
#if (UC3A || UC3B)
#define EXT_INT0    AVR32_EIC_INT0 //!< Line 0
#define EXT_INT1    AVR32_EIC_INT1 //!< Line 1
#define EXT_INT2    AVR32_EIC_INT2 //!< Line 2
#define EXT_INT3    AVR32_EIC_INT3 //!< Line 3
#define EXT_INT4    AVR32_EIC_INT4 //!< Line 4
#define EXT_INT5    AVR32_EIC_INT5 //!< Line 5
#define EXT_INT6    AVR32_EIC_INT6 //!< Line 6
#define EXT_INT7    AVR32_EIC_INT7 //!< Line 7
#define EXT_NMI     AVR32_EIC_NMI  //!< Line 8
#else
#define EXT_INT0    AVR32_EIC_INT1  //!< Line 0
#define EXT_INT1    AVR32_EIC_INT2 //!< Line 1
#define EXT_INT2    AVR32_EIC_INT3 //!< Line 2
#define EXT_INT3    AVR32_EIC_INT4 //!< Line 3
#define EXT_INT4    AVR32_EIC_INT5 //!< Line 4
#define EXT_INT5    AVR32_EIC_INT6 //!< Line 5
#define EXT_INT6    AVR32_EIC_INT7 //!< Line 6
#define EXT_INT7    AVR32_EIC_INT8 //!< Line 7
#define EXT_NMI     AVR32_EIC_NMI  //!< Line 8

#endif


//! @}

/*! \name Mode Trigger Options
 */
//! @{
#define EIC_MODE_EDGE_TRIGGERED   AVR32_EIC_EDGE_IRQ //!<
#define EIC_MODE_LEVEL_TRIGGERED  AVR32_EIC_LEVEL_IRQ //!<
//! @}

/*! \name Edge level Options
 */
//! @{
#define EIC_EDGE_FALLING_EDGE     AVR32_EIC_FALLING_EDGE //!<
#define EIC_EDGE_RISING_EDGE      AVR32_EIC_RISING_EDGE //!<
//! @}

/*! \name Level Options
 */
//! @{
#define EIC_LEVEL_LOW_LEVEL       AVR32_EIC_LOW_LEVEL //!<
#define EIC_LEVEL_HIGH_LEVEL      AVR32_EIC_HIGH_LEVEL //!<
//! @}

/*! \name Filter Options
 */
//! @{
#define EIC_FILTER_ENABLED        AVR32_EIC_FILTER_ON //!<
#define EIC_FILTER_DISABLED       AVR32_EIC_FILTER_OFF //!<
//! @}

/*! \name Synch Mode Options
 */
//! @{
#define EIC_SYNCH_MODE            AVR32_EIC_SYNC //!<
#define EIC_ASYNCH_MODE           AVR32_EIC_USE_ASYNC //!<
//! @}

//! Configuration parameters of the EIC module.
typedef struct
{
  //!Line
  unsigned char eic_line;

  //! Mode : EDGE_LEVEL or TRIGGER_LEVEL
  unsigned char eic_mode;

  //! Edge : FALLING_EDGE or RISING_EDGE
  unsigned char eic_edge;

  //! Level :  LOW_LEVEL or HIGH_LEVEL
  unsigned char eic_level;

  //! Filter:  NOT_FILTERED or FILTERED
  unsigned char eic_filter;

  //! Async:  SYNC mode or ASYNC
  unsigned char eic_async;

} eic_options_t;


/*! \brief Init the EIC driver.
 *
 * \param eic Base address of the EIC module
 * \param opt Configuration parameters of the EIC module (see \ref eic_options_t)
 * \param nb_lines Number of lines to consider, equal to size of opt buffer
 */
extern void eic_init(volatile avr32_eic_t *eic, const eic_options_t *opt, uint32_t nb_lines);

/*! \brief Enable the EIC driver.
 *
 * \param eic Base address of the EIC module
 * \param mask_lines Mask for current selected lines
 */
extern void eic_enable_lines(volatile avr32_eic_t *eic, uint32_t mask_lines);

/*! \brief Enable the EIC driver.
 *
 * \param eic Base address of the EIC module
 * \param line_number Line number to enable
 */
extern void eic_enable_line(volatile avr32_eic_t *eic, uint32_t line_number);

/*! \brief Disable the EIC driver.
 *
 * \param eic Base address of the EIC module
 * \param mask_lines Mask for current selected lines
 */
extern void eic_disable_lines(volatile avr32_eic_t *eic, uint32_t mask_lines);

/*! \brief Disable the EIC driver.
 *
 * \param eic Base address of the EIC module
 * \param line_number Line number to disable
 */
extern void eic_disable_line(volatile avr32_eic_t *eic, uint32_t line_number);

/*! \brief Tells whether an EIC line is enabled.
 *
 * \param eic Base address of the EIC module
 * \param line_number Line number to test
 *
 * \return Whether an EIC line is enabled.
 */
extern bool eic_is_line_enabled(volatile avr32_eic_t *eic, uint32_t line_number);

/*! \name Interrupt Control Functions
 */
//! @{

/*! \brief Enable the interrupt feature of the EIC.
 *
 * \param eic Base address of the EIC (i.e. &AVR32_EIC).
 * \param mask_lines Mask for current selected lines
 */
extern void eic_enable_interrupt_lines(volatile avr32_eic_t *eic, uint32_t mask_lines);

/*! \brief Enable the interrupt feature of the EIC.
 *
 * \param eic Base address of the EIC (i.e. &AVR32_EIC).
 * \param line_number Line number to enable
 */
extern void eic_enable_interrupt_line(volatile avr32_eic_t *eic, uint32_t line_number);

/*! \brief Disable the interrupt feature of the EIC.
 *
 * \param eic Base address of the EIC (i.e. &AVR32_EIC).
 * \param mask_lines Mask for current selected lines
 */
extern void eic_disable_interrupt_lines(volatile avr32_eic_t *eic, uint32_t mask_lines);

/*! \brief Disable the interrupt feature of the EIC.
 *
 * \param eic Base address of the EIC (i.e. &AVR32_EIC).
 * \param line_number Line number to disable
 */
extern void eic_disable_interrupt_line(volatile avr32_eic_t *eic, uint32_t line_number);

/*! \brief Tells whether an EIC interrupt line is enabled.
 *
 * \param eic Base address of the EIC module
 * \param line_number Line number to test
 *
 * \return Whether an EIC interrupt line is enabled.
 */
extern bool eic_is_interrupt_line_enabled(volatile avr32_eic_t *eic, uint32_t line_number);

/*! \brief Clear the interrupt flag.
 *         Call this function once you've handled the interrupt.
 *
 * \param eic Base address of the EIC (i.e. &AVR32_EIC).
 * \param mask_lines Mask for current selected lines
 */
extern void eic_clear_interrupt_lines(volatile avr32_eic_t *eic, uint32_t mask_lines);

/*! \brief Clear the interrupt flag.
 *         Call this function once you've handled the interrupt.
 *
 * \param eic Base address of the EIC (i.e. &AVR32_EIC).
 * \param line_number Line number to clear
 */
extern void eic_clear_interrupt_line(volatile avr32_eic_t *eic, uint32_t line_number);

/*! \brief Tells whether an EIC interrupt line is pending.
 *
 * \param eic Base address of the EIC module
 * \param line_number Line number to test
 *
 * \return Whether an EIC interrupt line is pending.
 */
extern bool eic_is_interrupt_line_pending(volatile avr32_eic_t *eic, uint32_t line_number);

/*! \brief Enable the interrupt scan feature of the EIC.
 *
 * \param eic Base address of the EIC (i.e. &AVR32_EIC).
 * \param presc Prescale select for the keypad scan rate in the range [0,31].
 */
extern void eic_enable_interrupt_scan(volatile avr32_eic_t *eic, uint32_t presc);

/*! \brief Disable the interrupt scan feature of the EIC.
 *
 * \param eic Base address of the EIC (i.e. &AVR32_EIC).
 */
extern void eic_disable_interrupt_scan(volatile avr32_eic_t *eic);

/*! \brief Return scan pad number that causes interrupt.
 *
 * \param eic Base address of the EIC (i.e. &AVR32_EIC).
 */
extern uint32_t eic_get_interrupt_pad_scan(volatile avr32_eic_t *eic);

//! @}

/**
 * \}
 */

#endif  // _EIC_H_
