flight/pios/inc/pios_mpxv.h

   1 /**
   2  ******************************************************************************
   3  * @addtogroup PIOS PIOS Core hardware abstraction layer
   4  * @{
   5  * @addtogroup PIOS_MPXV MPXV* Functions
   6  * @brief Hardware functions to deal with the DIYDrones airspeed kit, using MPXV5004, 7002 or similar
   7  * @{
   8  *
   9  * @file       pios_mpxv.h
  10  * @author     The OpenPilot Team, http://www.openpilot.org Copyright (C) 2012.
  11  * @brief      ETASV3 Airspeed Sensor Driver
  12  * @see        The GNU Public License (GPL) Version 3
  13  *
  14  ******************************************************************************/
  15 /*
  16  * This program is free software; you can redistribute it and/or modify
  17  * it under the terms of the GNU General Public License as published by
  18  * the Free Software Foundation; either version 3 of the License, or
  19  * (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful, but
  22  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  23  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  24  * for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License along
  27  * with this program; if not, write to the Free Software Foundation, Inc.,
  28  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  29  */
  30
  31 #ifndef PIOS_MPXV_H
  32 #define PIOS_MPXV_H
  33
  34 typedef enum { PIOS_MPXV_UNKNOWN, PIOS_MPXV_5004, PIOS_MPXV_7002 } PIOS_MPXV_sensortype;
  35 typedef struct {
  36     PIOS_MPXV_sensortype type;
  37     uint8_t  airspeedADCPin;
  38     uint16_t calibrationCount;
  39     uint32_t calibrationSum;
  40     uint16_t zeroPoint;
  41     float    maxSpeed;
  42 } PIOS_MPXV_descriptor;
  43
  44 #define PIOS_MPXV_5004_DESC(pin) \
  45     (PIOS_MPXV_descriptor) { \
  46         .type     = PIOS_MPXV_5004, \
  47         .airspeedADCPin = pin, \
  48         .maxSpeed = 80.0f, \
  49         .calibrationCount = 0, \
  50         .calibrationSum = 0, \
  51     }
  52 #define PIOS_MPXV_7002_DESC(pin) \
  53     (PIOS_MPXV_descriptor) { \
  54         .type     = PIOS_MPXV_7002, \
  55         .airspeedADCPin = pin, \
  56         .maxSpeed = 56.0f, \
  57         .calibrationCount = 0, \
  58         .calibrationSum = 0, \
  59     }
  60
  61
  62 uint16_t PIOS_MPXV_Measure(PIOS_MPXV_descriptor *desc);
  63 uint16_t PIOS_MPXV_Calibrate(PIOS_MPXV_descriptor *desc, uint16_t measurement);
  64 float PIOS_MPXV_CalcAirspeed(PIOS_MPXV_descriptor *desc, uint16_t measurement);
  65
  66 #endif /* PIOS_MPXV_H */