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63 lines
2.0 KiB
C
63 lines
2.0 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_ETASV3 ETASV3 Functions
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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_etasv3.c
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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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#include "pios.h"
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#ifdef PIOS_INCLUDE_ETASV3
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static bool PIOS_ETASV3_Read(uint8_t *buffer, uint8_t len)
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{
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const struct pios_i2c_txn txn_list[] = {
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{
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.info = __func__,
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.addr = ETASV3_I2C_ADDR,
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.rw = PIOS_I2C_TXN_READ,
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.len = len,
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.buf = buffer,
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}
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};
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return PIOS_I2C_Transfer(PIOS_I2C_ETASV3_ADAPTER, txn_list, NELEMENTS(txn_list));
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}
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int16_t PIOS_ETASV3_ReadAirspeed(void)
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{
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uint8_t airspeed_raw[2];
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if (PIOS_ETASV3_Read(airspeed_raw, sizeof(airspeed_raw)) != 0) {
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/* Failed to read airspeed */
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return -1;
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}
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return airspeed_raw[0] | (airspeed_raw[1] << 8);
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}
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#endif /* PIOS_INCLUDE_ETASV3 */
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