text: /****************************************************************************
   * arch/arm/src/samd2l2/sam_eic.h
   *
   *   Copyright (C) 2018 Gregory Nutt. All rights reserved.
   *   Author: Matt Thompson <matt@extent3d.com>
   *
   * 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.
   *
   ****************************************************************************/
  
  #ifndef __ARCH_ARM_SRC_SAMD2L2_SAM_EIC_H
  #define __ARCH_ARM_SRC_SAMD2L2_SAM_EIC_H
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  #include <nuttx/config.h>
  
  #include <stdint.h>
  #include <stdbool.h>
  
  #include "sam_config.h"
  #include "sam_port.h"
  
  #if defined(CONFIG_ARCH_FAMILY_SAMD20) || defined(CONFIG_ARCH_FAMILY_SAMD21)
  #  include "hardware/samd_eic.h"
  #elif defined(CONFIG_ARCH_FAMILY_SAML21)
  #  include "hardware/saml_eic.h"
  #else
  #  error Unrecognized SAMD/L architecture
  #endif
  
  /****************************************************************************
   * Public Function Prototypes
   ****************************************************************************/
  
  #undef EXTERN
  #if defined(__cplusplus)
  #define EXTERN extern "C"
  extern "C"
  {
  #else
  #define EXTERN extern
  #endif
  
  /****************************************************************************
   * Name: sam_eic_initialize
   *
   * Description:
   *   Initialize the EIC
   *
   * Input Parameters:
   *   gclkgen - GCLK Generator
   *
   * Returned Value:
   *   None
   *
   ****************************************************************************/
  
  int sam_eic_initialize(uint8_t gclkgen);
  
  /****************************************************************************
   * Name: sam_eic_initialize
   *
   * Description:
   *   Enable a external interrupt.
   *
   * Input Parameters:
   *   irq - SAM_IRQ_EXTINTn IRQ to be enabled
   *
   * Returned Value:
   *   None
   *
   ****************************************************************************/
  
  int sam_eic_irq_enable(int irq);
  
  /****************************************************************************
   * Name: sam_eic_config
   *
   * Description:
   *   Configure the interrupt edge sensitivity in CONFIGn register of the EIC
   *
   * Input Parameters:
   *   eirq    - Pin to be configured
   *   pinset  - Configuration of the pin
   *
   * Returned Value:
   *   None
   *
   ****************************************************************************/
  
  int sam_eic_config(uint8_t eirq, port_pinset_t pinset);
  
  #undef EXTERN
  #if defined(__cplusplus)
  }
  #endif
  #endif /* __ARCH_ARM_SRC_SAMD2L2_SAM_EIC_H */
  