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63 lines
2.2 KiB
C
63 lines
2.2 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_SDP3x SDP3x Differential pressure sensors
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* @brief Hardware functions to deal with the Eagle Tree Airspeed MicroSensor V3
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* @{
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*
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* @file pios_sdp3x.h
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* @author The LibrePilot Team, http://www.librepilot.org Copyright (C) 2021.
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* @brief SDP3x 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_SDP3X_H
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#define PIOS_SDP3X_H
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#define SDP3X_I2C_ADDR1 0x21
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#define SDP3X_I2C_ADDR2 0x22
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#define SDP3X_I2C_ADDR3 0x23
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#define SDP3X_SCALE_TEMPERATURE 200.0f
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#define SDP3X_RESET_ADDR 0x00
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#define SDP3X_RESET_CMD 0x06
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#define SDP3X_CONT_MEAS_AVG_MODE 0x3615
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#define SDP3X_CONT_MODE_STOP 0x3FF9
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#define SDP3X_SCALE_PRESSURE_SDP31 60
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#define SDP3X_SCALE_PRESSURE_SDP32 240
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#define SDP3X_SCALE_PRESSURE_SDP33 20
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#define SDP3X_CRC_INIT 0xff
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#define SDP3X_CRC_POLY 0x31
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#define SDP3X_CONVERSION_INTERVAL (1000000 / SDP3X_MEAS_RATE) /* microseconds */
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#define PIOS_SDP3X_RETRY_LIMIT 3
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struct PIOS_SDP3X_STATE {
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enum { SDP3X_STATUS_NOTFOUND, SDP3X_STATUS_CONFIGURED, SDP3X_STATUS_READY } status;
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int16_t pressure;
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int16_t temperature;
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int16_t scale;
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};
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void PIOS_SDP3X_ReadAirspeed(volatile struct PIOS_SDP3X_STATE *state);
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#endif /* PIOS_SDP3X_H */
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