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43 lines
1.8 KiB
C
43 lines
1.8 KiB
C
/**
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******************************************************************************
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* @addtogroup PIOS PIOS Core hardware abstraction layer
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* @{
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* @addtogroup PIOS_MPXV7002 MPXV7002 Functions
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* @brief Hardware functions to deal with the DIYDrones airspeed kit, using MPXV7002
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* @{
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*
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* @file pios_mpxv7002.h
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* @author The OpenPilot Team, http://www.openpilot.org Copyright (C) 2012.
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* @brief ETASV3 Airspeed Sensor Driver
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* @see The GNU Public License (GPL) Version 3
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*
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******************************************************************************/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef PIOS_MPXV7002_H__
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#define A0 340.27f //speed of sound at standard sea level in [m/s]
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#define P0 101.325f //static air pressure at standard sea level in kPa
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#define VCC 5.0f //Supply voltage in V
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#define POWER (2.0f/7.0f)
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uint16_t PIOS_MPXV7002_Measure(uint8_t airspeedADCPin);
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uint16_t PIOS_MPXV7002_Calibrate(uint8_t airspeedADCPin, uint16_t calibrationCount);
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void PIOS_MPXV7002_UpdateCalibration(uint16_t zeroPoint);
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float PIOS_MPXV7002_ReadAirspeed (uint8_t airspeedADCPin);
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#endif // PIOS_MPXV7002_H__
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