text: /****************************************************************************
   * configs/samd20-xplained/src/sam_userleds.c
   *
   *   Copyright (C) 2014-2015 Gregory Nutt. All rights reserved.
   *   Author: Gregory Nutt <gnutt@nuttx.org>
   *
   * 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.
   *
   ****************************************************************************/
  /* There are three LEDs on board the SAMD20 Xplained Pro board:  The EDBG
   * controls two of the LEDs, a power LED and a status LED.  There is only
   * one user controllable LED, a yellow LED labeled STATUS near the SAMD20 USB
   * connector.
   *
   * This LED is controlled by PA14 and the LED can be activated by driving PA14
   * to GND.
   *
   * When CONFIG_ARCH_LEDS is defined in the NuttX configuration, NuttX will
   * control the LED.  Otherwise, the LED can be controlled from user applications
   * using the logic in this file.
   */
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  #include <nuttx/config.h>
  
  #include <stdint.h>
  #include <stdbool.h>
  #include <debug.h>
  
  #include <arch/board/board.h>
  
  #include "sam_port.h"
  #include "samd20-xplained.h"
  
  #ifndef CONFIG_ARCH_LEDS
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Name: board_userled_initialize
   *
   * Description:
   *   If CONFIG_ARCH_LEDS is defined, then NuttX will control the on-board
   *   LEDs.  If CONFIG_ARCH_LEDS is not defined, then the
   *   board_userled_initialize() is available to initialize the LED from user
   *   application logic.
   *
   ****************************************************************************/
  
  void board_userled_initialize(void)
  {
    (void)sam_configport(PORT_STATUS_LED);
  }
  
  /****************************************************************************
   * Name: board_userled
   *
   * Description:
   *   If CONFIG_ARCH_LEDS is defined, then NuttX will control the on-board
   *  LEDs.  If CONFIG_ARCH_LEDS is not defined, then the board_userled() is
   *  available to control the LED from user application logic.
   *
   ****************************************************************************/
  
  void board_userled(int led, bool ledon)
  {
    if (led == BOARD_STATUS_LED)
      {
        sam_portwrite(PORT_STATUS_LED, !ledon);
      }
  }
  
  /****************************************************************************
   * Name: board_userled_all
   *
   * Description:
   *   If CONFIG_ARCH_LEDS is defined, then NuttX will control the on-board
   *   LEDs.  If CONFIG_ARCH_LEDS is not defined, then the board_userled_all() is
   *   available to control the LED from user application logic.  NOTE:  since
   *   there is only a single LED on-board, this is function is not very useful.
   *
   ****************************************************************************/
  
  void board_userled_all(uint8_t ledset)
  {
    board_userled(BOARD_STATUS_LED, (ledset & BOARD_STATUS_LED_BIT) != 0);
  }
  
  #endif /* !CONFIG_ARCH_LEDS */
  