text: /****************************************************************************
   * configs/sabre-6quad/include/imx_autoleds.c
   *
   *   Copyright (C) 2016 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.
   *
   ****************************************************************************/
  
  /* LEDs
   *
   * A single LED is available driven by USR_DEF_RED_LED.
   *
   * These LEDs are not used by the board port unless CONFIG_ARCH_LEDS is
   * defined.  In that case, the usage by the board port is defined in
   * include/board.h and src/imx_autoleds.c. The LEDs are used to encode
   * OS-related events as follows:
   *
   *   ------------------- ----------------------- ------
   *   SYMBOL              Meaning                 LED
   *   ------------------- ----------------------- ------
   *   LED_STARTED         NuttX has been started  OFF
   *   LED_HEAPALLOCATE    Heap has been allocated OFF
   *   LED_IRQSENABLED     Interrupts enabled      OFF
   *   LED_STACKCREATED    Idle stack created      ON
   *   LED_INIRQ           In an interrupt         N/C
   *   LED_SIGNAL          In a signal handler     N/C
   *   LED_ASSERTION       An assertion failed     N/C
   *   LED_PANIC           The system has crashed  FLASH
   *
   * Thus is LED is statically on, NuttX has successfully  booted and is,
   * apparently, running normally.  If LED is flashing at approximately
   * 2Hz, then a fatal error has been detected and the system has halted.
   */
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  #include <nuttx/config.h>
  
  #include <stdint.h>
  #include <stdbool.h>
  #include <debug.h>
  
  #include <nuttx/board.h>
  #include <arch/board/board.h>
  
  #include "up_arch.h"
  #include "imx_gpio.h"
  #include "sabre-6quad.h"
  
  #ifdef CONFIG_ARCH_LEDS
  
  /****************************************************************************
   * Pre-processor Definitions
   ****************************************************************************/
  
  /* CONFIG_DEBUG_LEDS enables debug output from this file (needs CONFIG_DEBUG_FEATURES
   * with CONFIG_DEBUG_INFO too)
   */
  
  #ifdef CONFIG_DEBUG_LEDS
  #  define lederr  llerr
  #  define ledinfo llinfo
  #else
  #  define lederr(x...)
  #  define ledinfo(x...)
  #endif
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Name: board_autoled_initialize
   ****************************************************************************/
  
  void board_autoled_initialize(void)
  {
    /* Configure LED PIOs for output */
  
    imx_config_gpio(GPIO_LED);
  }
  
  /****************************************************************************
   * Name: board_autoled_on
   ****************************************************************************/
  
  void board_autoled_on(int led)
  {
    if (led == 1 || led == 3)
      {
        imx_gpio_write(GPIO_LED, true); /* High illuminates */
      }
  }
  
  /****************************************************************************
   * Name: board_autoled_off
   ****************************************************************************/
  
  void board_autoled_off(int led)
  {
    if (led == 3)
      {
        imx_gpio_write(GPIO_LED, false);  /* Low extinguishes */
      }
  }
  
  #endif /* CONFIG_ARCH_LEDS */
  