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RIOT/drivers/lis3dh/lis3dh_saul.c 1.11 KB
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  /*
   * Copyright (C) 2016 Eistec AB
   *
   * This file is subject to the terms and conditions of the GNU Lesser
   * General Public License v2.1. See the file LICENSE in the top level
   * directory for more details.
   */
  
  /**
   * @ingroup   driver_lis3dh
   * @{
   *
   * @file
   * @brief     LIS3DH adaption to the RIOT actuator/sensor interface
   *
   * @author    Joakim Nohlgård <joakim.nohlgard@eistec.se>
   *
   * @}
   */
  
  #include <string.h>
  #include <stdio.h>
  
  #include "saul.h"
  #include "lis3dh.h"
  
  static int read_acc(void *dev, phydat_t *res)
  {
      lis3dh_data_t xyz;
  
      lis3dh_t *d = (lis3dh_t *)dev;
      int err = lis3dh_read_xyz(d, &xyz);
      if (err != 0) {
          /* Something went wrong in the LIS3DH driver */
          return -ECANCELED;
      }
  
      res->val[0] = xyz.acc_x;
      res->val[1] = xyz.acc_y;
      res->val[2] = xyz.acc_z;
      /* unit: milli-G */
      res->scale = -3;
      res->unit = UNIT_G;
  
      return 3;
  }
  
  static int write(void *dev, phydat_t *state)
  {
      (void) dev;
      (void) state;
      return -ENOTSUP;
  }
  
  const saul_driver_t lis3dh_saul_driver = {
      .read = read_acc,
      .write = write,
      .type = SAUL_SENSE_ACCEL,
  };