DRIVERS/EIC/eic.c

/* This source file is part of the ATMEL AVR-UC3-SoftwareFramework-1.7.0 Release */

/*This file is prepared for Doxygen automatic documentation generation.*/
/*! \file *********************************************************************
 *
 * \brief EIC driver for AVR32 UC3.
 *
 * AVR32 External Interrupt Controller driver module.
 *
 * - Compiler:           IAR EWAVR32 and GNU GCC for AVR32
 * - Supported devices:  All AVR32 devices with an EIC module can be used.
 * - AppNote:
 *
 * \author               Atmel Corporation: http://www.atmel.com \n
 *                       Support and FAQ: http://support.atmel.no/
 *
 ******************************************************************************/

/* Copyright (c) 2009 Atmel Corporation. All rights reserved.
 *
 * 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
 * AVR 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
 *
 */

#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, unsigned int 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, unsigned int mask_lines)
{
  eic->en = mask_lines;
}

void eic_enable_line(volatile avr32_eic_t *eic, unsigned int line_number)
{
  // Enable line line_number
  eic->en = 1 << line_number;
}

void eic_disable_lines(volatile avr32_eic_t *eic, unsigned int mask_lines)
{
  eic->dis = mask_lines;
}

void eic_disable_line(volatile avr32_eic_t *eic, unsigned int line_number)
{
  // Disable line line_number
  eic->dis = 1 << line_number;
}

Bool eic_is_line_enabled(volatile avr32_eic_t *eic, unsigned int line_number)
{
  return (eic->ctrl & (1 << line_number)) != 0;
}

void eic_enable_interrupt_lines(volatile avr32_eic_t *eic, unsigned int mask_lines)
{
  eic->ier = mask_lines;
}

void eic_enable_interrupt_line(volatile avr32_eic_t *eic, unsigned int line_number)
{
  // Enable line line_number
  eic->ier = 1 << line_number;
}

void eic_disable_interrupt_lines(volatile avr32_eic_t *eic, unsigned int mask_lines)
{
  Bool global_interrupt_enabled = Is_global_interrupt_enabled();

  if (global_interrupt_enabled) Disable_global_interrupt();
  eic->idr = mask_lines;
  eic->imr;
  if (global_interrupt_enabled) Enable_global_interrupt();
}

void eic_disable_interrupt_line(volatile avr32_eic_t *eic, unsigned int line_number)
{
  Bool global_interrupt_enabled = Is_global_interrupt_enabled();

  // Disable line line_number
  if (global_interrupt_enabled) Disable_global_interrupt();
  eic->idr = 1 << line_number;
  eic->imr;
  if (global_interrupt_enabled) Enable_global_interrupt();
}

Bool eic_is_interrupt_line_enabled(volatile avr32_eic_t *eic, unsigned int line_number)
{
  return (eic->imr & (1 << line_number)) != 0;
}

void eic_clear_interrupt_lines(volatile avr32_eic_t *eic, unsigned int mask_lines)
{
  Bool global_interrupt_enabled = Is_global_interrupt_enabled();

  if (global_interrupt_enabled) Disable_global_interrupt();
  eic->icr = mask_lines;
  eic->isr;
  if (global_interrupt_enabled) Enable_global_interrupt();
}

void eic_clear_interrupt_line(volatile avr32_eic_t *eic, unsigned int line_number)
{
  Bool global_interrupt_enabled = Is_global_interrupt_enabled();

  // Clear line line_number
  if (global_interrupt_enabled) Disable_global_interrupt();
  eic->icr = 1 << line_number;
  eic->isr;
  if (global_interrupt_enabled) Enable_global_interrupt();
}

Bool eic_is_interrupt_line_pending(volatile avr32_eic_t *eic, unsigned int line_number)
{
  return (eic->isr & (1 << line_number)) != 0;
}

#if !defined(AVR32_EIC_301_H_INCLUDED)
void eic_enable_interrupt_scan(volatile avr32_eic_t *eic,unsigned int 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;
}

unsigned long 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