text: /*****************************************************************************
   *
   * \file
   *
   * \brief EIC driver for AVR32 UC3.
   *
   * AVR32 External Interrupt Controller driver module.
   *
   * Copyright (c) 2009-2014 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
   *
   ******************************************************************************/
   /**
   * Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
   */
  
  
  #include <avr32/io.h>
  #include "compiler.h"
  #include "preprocessor.h"
  #include "eic.h"
  
  
  
  void eic_init(volatile avr32_eic_t *eic, const eic_options_t *opt, uint32_t nb_lines)
  {
  	int i;
  	for (i = 0; i < nb_lines; i++)
  	{
  		// Set up mode level
  		eic->mode = (opt[i].eic_mode == 1)
  			? (eic->mode | (1 << opt[i].eic_line))
  			: (eic->mode & ~(1 << opt[i].eic_line));
  		// Set up edge type
  		eic->edge = (opt[i].eic_edge == 1)
  			? (eic->edge | (1 << opt[i].eic_line))
  			: (eic->edge & ~(1 << opt[i].eic_line));
  		// Set up level
  		eic->level = (opt[i].eic_level == 1)
  			? (eic->level | (1 << opt[i].eic_line))
  			: (eic->level & ~(1 << opt[i].eic_line));
  		// Set up if filter is used
  		eic->filter = (opt[i].eic_filter == 1)
  			? (eic->filter | (1 << opt[i].eic_line))
  			: (eic->filter & ~(1 << opt[i].eic_line));
  		// Set up which mode is used : asynchronous mode/ synchronous mode
  		eic->async = (opt[i].eic_async == 1)
  			? (eic->async | (1 << opt[i].eic_line))
  			: (eic->async & ~(1 << opt[i].eic_line));
  	}
  }
  
  void eic_enable_lines(volatile avr32_eic_t *eic, uint32_t mask_lines)
  {
  	eic->en = mask_lines;
  }
  
  void eic_enable_line(volatile avr32_eic_t *eic, uint32_t line_number)
  {
  	// Enable line line_number
  	eic->en = 1 << line_number;
  }
  
  void eic_disable_lines(volatile avr32_eic_t *eic, uint32_t mask_lines)
  {
  	eic->dis = mask_lines;
  }
  
  void eic_disable_line(volatile avr32_eic_t *eic, uint32_t line_number)
  {
  	// Disable line line_number
  	eic->dis = 1 << line_number;
  }
  
  bool eic_is_line_enabled(volatile avr32_eic_t *eic, uint32_t line_number)
  {
  	return (eic->ctrl & (1 << line_number)) != 0;
  }
  
  void eic_enable_interrupt_lines(volatile avr32_eic_t *eic, uint32_t mask_lines)
  {
  	eic->ier = mask_lines;
  }
  
  void eic_enable_interrupt_line(volatile avr32_eic_t *eic, uint32_t line_number)
  {
  	// Enable line line_number
  	eic->ier = 1 << line_number;
  }
  
  void eic_disable_interrupt_lines(volatile avr32_eic_t *eic, uint32_t mask_lines)
  {
  	irqflags_t flags;
  	flags = cpu_irq_save();
  	eic->idr = mask_lines;
  	eic->imr;
  	cpu_irq_restore(flags);
  }
  
  void eic_disable_interrupt_line(volatile avr32_eic_t *eic, uint32_t line_number)
  {
  	irqflags_t flags;
  	flags = cpu_irq_save();
  	eic->idr = 1 << line_number;
  	eic->imr;
  	cpu_irq_restore(flags);
  }
  
  bool eic_is_interrupt_line_enabled(volatile avr32_eic_t *eic, uint32_t line_number)
  {
  	return (eic->imr & (1 << line_number)) != 0;
  }
  
  void eic_clear_interrupt_lines(volatile avr32_eic_t *eic, uint32_t mask_lines)
  {
  	irqflags_t flags;
  	flags = cpu_irq_save();
  	eic->icr = mask_lines;
  	eic->isr;
  	cpu_irq_restore(flags);
  }
  
  void eic_clear_interrupt_line(volatile avr32_eic_t *eic, uint32_t line_number)
  {
  	irqflags_t flags;
  	flags = cpu_irq_save();
  	eic->icr = 1 << line_number;
  	eic->isr;
  	cpu_irq_restore(flags);
  }
  
  bool eic_is_interrupt_line_pending(volatile avr32_eic_t *eic, uint32_t line_number)
  {
  	return (eic->isr & (1 << line_number)) != 0;
  }
  
  #if !defined(AVR32_EIC_301_H_INCLUDED) && !defined(AVR32_EIC_302_H_INCLUDED)
  void eic_enable_interrupt_scan(volatile avr32_eic_t *eic, uint32_t presc)
  {
  	// Enable SCAN function with PRESC value
  	eic->scan |= (presc << AVR32_EIC_SCAN_PRESC_OFFSET) | (1 << AVR32_EIC_SCAN_EN_OFFSET);
  }
  
  void eic_disable_interrupt_scan(volatile avr32_eic_t *eic)
  {
  	// Disable SCAN function
  	eic->scan = 0 << AVR32_EIC_SCAN_EN_OFFSET;
  }
  
  uint32_t eic_get_interrupt_pad_scan(volatile avr32_eic_t *eic)
  {
  	// Return pad number that causes interrupt
  	return(eic->scan>>AVR32_EIC_SCAN_PIN_OFFSET);
  }
  #endif
  