/*
   * 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     drivers_saul
   * @{
   *
   * @file
   * @brief       SAUL wrapper for direct access to analog pins
   *
   * @author      Joakim Nohlgård <joakim.nohlgard@eistec.se>
   *
   * @}
   */
  
  #include <string.h>
  
  #include "saul.h"
  #include "saul/periph.h"
  #include "phydat.h"
  #include "periph/adc.h"
  
  
  static int read_adc(const void *dev, phydat_t *res)
  {
      const saul_adc_params_t *params = *((const saul_adc_params_t **)dev);
      res->val[0] = adc_sample(params->line, params->res);
      memset(&(res->val[1]), 0, 2 * sizeof(res->val[1]));
      /* Raw ADC reading has no unit */
      res->unit = UNIT_NONE;
      res->scale = 0;
      return 1;
  }
  
  const saul_driver_t adc_saul_driver = {
      .read = read_adc,
      .write = saul_notsup,
      .type = SAUL_SENSE_ANALOG,
  };