text: /****************************************************************************
   * boards/arm/stm32/omnibusf4/src/stm32_userleds.c
   *
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.  The
   * ASF licenses this file to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance with the
   * License.  You may obtain a copy of the License at
   *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
   * License for the specific language governing permissions and limitations
   * under the License.
   *
   ****************************************************************************/
  
  /****************************************************************************
   * Included Files
   ****************************************************************************/
  
  #include <nuttx/config.h>
  
  #include <stdint.h>
  #include <stdbool.h>
  #include <debug.h>
  
  #include <nuttx/board.h>
  #include <nuttx/power/pm.h>
  #include <arch/board/board.h>
  
  #include "chip.h"
  #include "arm_internal.h"
  #include "stm32.h"
  #include "omnibusf4.h"
  
  #ifndef CONFIG_ARCH_LEDS
  
  /****************************************************************************
   * Private Data
   ****************************************************************************/
  
  /* This array maps an LED number to GPIO pin configuration */
  
  static uint32_t g_ledcfg[BOARD_NLEDS] =
  {
    GPIO_LED1,
    GPIO_BEEPER1
  };
  
  /****************************************************************************
   * Private Function Protototypes
   ****************************************************************************/
  
  /* LED Power Management */
  
  #ifdef CONFIG_PM
  static void led_pm_notify(struct pm_callback_s *cb, int domain,
                            enum pm_state_e pmstate);
  static int led_pm_prepare(struct pm_callback_s *cb, int domain,
                            enum pm_state_e pmstate);
  #endif
  
  /****************************************************************************
   * Private Data
   ****************************************************************************/
  
  #ifdef CONFIG_PM
  static struct pm_callback_s g_ledscb =
  {
    .notify  = led_pm_notify,
    .prepare = led_pm_prepare,
  };
  #endif
  
  /****************************************************************************
   * Private Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Name: led_pm_notify
   *
   * Description:
   *   Notify the driver of new power state. This callback is called after
   *   all drivers have had the opportunity to prepare for the new power state.
   *
   ****************************************************************************/
  
  #ifdef CONFIG_PM
  static void led_pm_notify(struct pm_callback_s *cb, int domain,
                            enum pm_state_e pmstate)
  {
    switch (pmstate)
      {
        case(PM_NORMAL):
          {
            /* Restore normal LEDs operation */
          }
          break;
  
        case(PM_IDLE):
          {
            /* Entering IDLE mode - Turn leds off */
          }
          break;
  
        case(PM_STANDBY):
          {
            /* Entering STANDBY mode - Logic for PM_STANDBY goes here */
          }
          break;
  
        case(PM_SLEEP):
          {
            /* Entering SLEEP mode - Logic for PM_SLEEP goes here */
          }
          break;
  
        default:
          {
            /* Should not get here */
          }
          break;
      }
  }
  #endif
  
  /****************************************************************************
   * Name: led_pm_prepare
   *
   * Description:
   *   Request the driver to prepare for a new power state. This is a warning
   *   that the system is about to enter into a new power state. The driver
   *   should begin whatever operations that may be required to enter power
   *   state. The driver may abort the state change mode by returning a
   *   non-zero value from the callback function.
   *
   ****************************************************************************/
  
  #ifdef CONFIG_PM
  static int led_pm_prepare(struct pm_callback_s *cb, int domain,
                            enum pm_state_e pmstate)
  {
    /* No preparation to change power modes is required by the LEDs driver.
     * We always accept the state change by returning OK.
     */
  
    return OK;
  }
  #endif
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Name: board_userled_initialize
   ****************************************************************************/
  
  uint32_t board_userled_initialize(void)
  {
    for (unsigned wled = 0; wled < BOARD_NLEDS; wled++)
      {
        stm32_configgpio(g_ledcfg[wled]);
      }
  
    return BOARD_NLEDS;
  }
  
  /****************************************************************************
   * Name: board_userled
   ****************************************************************************/
  
  void board_userled(int led, bool ledon)
  {
    if ((unsigned)led < BOARD_NLEDS)
      {
        stm32_gpiowrite(g_ledcfg[led], ledon);
      }
  }
  
  /****************************************************************************
   * Name: board_userled_all
   ****************************************************************************/
  
  void board_userled_all(uint32_t ledset)
  {
    for (unsigned wled = 0; wled < BOARD_NLEDS; wled++)
      {
        stm32_gpiowrite(g_ledcfg[wled],
                       (ledset & (1 << wled)) == 0 ? 1 : 0);
      }
  }
  
  /****************************************************************************
   * Name: stm32_led_pminitialize
   ****************************************************************************/
  
  #ifdef CONFIG_PM
  void stm32_led_pminitialize(void)
  {
    /* Register to receive power management callbacks */
  
    int ret = pm_register(&g_ledscb);
    if (ret != OK)
      {
        board_autoled_on(LED_ASSERTION);
      }
  }
  #endif /* CONFIG_PM */
  
  #endif /* !CONFIG_ARCH_LEDS */
  