text: /****************************************************************************
   * boards/arm/stm32l4/stm32l476vg-disco/src/stm32_autoleds.c
   *
   *   Copyright (C) 2016 Gregory Nutt. All rights reserved.
   *   Author: dev@ziggurat29.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.
   *
   ****************************************************************************/
  
  /****************************************************************************
   * 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 "chip.h"
  #include "up_arch.h"
  #include "up_internal.h"
  #include "stm32l4.h"
  #include "stm32l476vg-disco.h"
  
  #ifdef CONFIG_ARCH_LEDS
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Name: board_autoled_initialize
   ****************************************************************************/
  
  void board_autoled_initialize(void)
  {
    /* Configure LD4,5 GPIO for output */
  
    stm32l4_configgpio(GPIO_LED_RED);
    stm32l4_configgpio(GPIO_LED_GRN);
  }
  
  /****************************************************************************
   * Name: board_autoled_on
   ****************************************************************************/
  
  void board_autoled_on(int led)
  {
    switch (led)
      {
        /* 0: LED_STARTED, LED_HEAPALLOCATE, LED_IRQSENABLED
         *
         * Since the LEDs were initially all OFF and since this state only
         * occurs one time, nothing need be done.
         */
  
        default:
        case LED_STARTED:
        case LED_HEAPALLOCATE:
        case LED_IRQSENABLED:
          break;
  
        /* 1: LED_STACKCREATED
         *
         * This case will also occur only once.
         */
  
        case LED_STACKCREATED:
          break;
  
        /* 2: LED_INIRQ, LED_SIGNAL, LED_ASSERTION
         *
         * This case will occur many times.
         */
  
        case LED_INIRQ:
        case LED_SIGNAL:
        case LED_ASSERTION:
          stm32l4_gpiowrite(GPIO_LED_RED, true);
          break;
  
        /* 3: LED_PANIC: GPIO_LED_GRN=OFF RX=ON
         *
         * This case will also occur many times.
         */
  
        case LED_PANIC:
          stm32l4_gpiowrite(GPIO_LED_GRN, false);
          stm32l4_gpiowrite(GPIO_LED_RED, true);
          break;
  
        case LED_IDLE:
          stm32l4_gpiowrite(GPIO_LED_GRN, true);
          stm32l4_gpiowrite(GPIO_LED_RED, false);
          break;
      }
  }
  
  /****************************************************************************
   * Name: board_autoled_off
   ****************************************************************************/
  
  void board_autoled_off(int led)
  {
    switch (led)
      {
        /* 0: LED_STARTED, LED_HEAPALLOCATE, LED_IRQSENABLED:
         * 1: LED_STACKCREATED:
         *
         * These cases should never happen.
         */
  
        default:
        case LED_STARTED:
        case LED_HEAPALLOCATE:
        case LED_IRQSENABLED:
        case LED_STACKCREATED:
          break;
  
        /* 2: LED_INIRQ, LED_SIGNAL, LED_ASSERTION:
         *
         * This case will occur many times.
         */
  
        case LED_INIRQ:
        case LED_SIGNAL:
        case LED_ASSERTION:
          stm32l4_gpiowrite(GPIO_LED_RED, false);
          break;
  
        /* 3: LED_PANIC: GPIO_LED_GRN=OFF RX=OFF
         *
         * This case will also occur many times.
         */
  
        case LED_PANIC:
          stm32l4_gpiowrite(GPIO_LED_GRN, false);
          stm32l4_gpiowrite(GPIO_LED_RED, false);
          break;
  
        case LED_IDLE:
          stm32l4_gpiowrite(GPIO_LED_GRN, false);
          stm32l4_gpiowrite(GPIO_LED_RED, false);
          break;
      }
  }
  
  #endif /* CONFIG_ARCH_LEDS */
  