text: /****************************************************************************
   * boards/arm/stm32l4/nucleo-l432kc/src/stm32_qencoder.c
   *
   *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
   *   Author: Gregory Nutt <gnutt@nuttx.org>
   *
   *   Copyright (C) 2016 Sebastien Lorquet. All rights reserved.
   *   Author: Sebastien Lorquet <sebastien@lorquet.fr>
   *
   * 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 <errno.h>
  #include <debug.h>
  
  #include <nuttx/sensors/qencoder.h>
  #include <arch/board/board.h>
  
  #include "chip.h"
  #include "arm_arch.h"
  #include "stm32l4_qencoder.h"
  #include "nucleo-l432kc.h"
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Name: qe_devinit
   *
   * Description:
   *   All STM32L4 architectures must provide the following interface to work
   *   with examples/qencoder.
   *
   ****************************************************************************/
  
  int stm32l4_qencoder_initialize(FAR const char *devpath, int timer)
  {
    int ret;
  
    /* Initialize a quadrature encoder interface. */
  
    sninfo("Initializing the quadrature encoder using TIM%d\n", timer);
    ret = stm32l4_qeinitialize(devpath, timer);
    if (ret < 0)
      {
        snerr("ERROR: stm32l4_qeinitialize failed: %d\n", ret);
      }
  
    return ret;
  }
  