text: /****************************************************************************
   *
   *   Copyright (c) 2015-2018 PX4 Development Team. All rights reserved.
   *
   * 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 PX4 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.
   *
   ****************************************************************************/
  
  /**
   * @file px4io_params.c
   *
   * Parameters defined by the PX4IO driver
   *
   * @author Lorenz Meier <lorenz@px4.io>
   */
  
  #include <px4_config.h>
  #include <parameters/param.h>
  
  /**
   * Set usage of IO board
   *
   * Can be used to use a standard startup script but with a FMU only set-up. Set to 0 to force the FMU only set-up.
   *
   * @boolean
   * @min 0
   * @max 1
   * @reboot_required true
   * @group System
   */
  PARAM_DEFINE_INT32(SYS_USE_IO, 1);
  
  /**
   * S.BUS out
   *
   * Set to 1 to enable S.BUS version 1 output instead of RSSI.
   *
   * @boolean
   * @group PWM Outputs
   */
  PARAM_DEFINE_INT32(PWM_SBUS_MODE, 0);
  
  /**
   * PWM input channel that provides RSSI.
   *
   * 0: do not read RSSI from input channel
   * 1-18: read RSSI from specified input channel
   *
   * Specify the range for RSSI input with RC_RSSI_PWM_MIN and RC_RSSI_PWM_MAX parameters.
   *
   * @min 0
   * @max 18
   * @value 0 Unassigned
   * @value 1 Channel 1
   * @value 2 Channel 2
   * @value 3 Channel 3
   * @value 4 Channel 4
   * @value 5 Channel 5
   * @value 6 Channel 6
   * @value 7 Channel 7
   * @value 8 Channel 8
   * @value 9 Channel 9
   * @value 10 Channel 10
   * @value 11 Channel 11
   * @value 12 Channel 12
   * @value 13 Channel 13
   * @value 14 Channel 14
   * @value 15 Channel 15
   * @value 16 Channel 16
   * @value 17 Channel 17
   * @value 18 Channel 18
   * @group Radio Calibration
   *
   */
  PARAM_DEFINE_INT32(RC_RSSI_PWM_CHAN, 0);
  
  /**
   * Max input value for RSSI reading.
   *
   * Only used if RC_RSSI_PWM_CHAN > 0
   *
   * @min 0
   * @max 2000
   * @group Radio Calibration
   *
   */
  PARAM_DEFINE_INT32(RC_RSSI_PWM_MAX, 1000);
  
  /**
   * Min input value for RSSI reading.
   *
   * Only used if RC_RSSI_PWM_CHAN > 0
   *
   * @min 0
   * @max 2000
   * @group Radio Calibration
   *
   */
  PARAM_DEFINE_INT32(RC_RSSI_PWM_MIN, 2000);
  