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https://gitee.com/mirrors_PX4/PX4-Autopilot.git
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129 lines
3.6 KiB
C++
129 lines
3.6 KiB
C++
/****************************************************************************
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*
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* Copyright (c) 2016 PX4 Development Team. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name PX4 nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/**
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* @file bmp280_spi.cpp
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*
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* SPI interface for BMP280
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*/
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#include <px4_config.h>
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#include "bmp280.h"
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#include <drivers/device/i2c.h>
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#include "board_config.h"
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#if defined(PX4_I2C_OBDEV_BMP280) || defined(PX4_I2C_EXT_OBDEV_BMP280)
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class BMP280_I2C: public device::I2C, public bmp280::IBMP280
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{
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public:
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BMP280_I2C(uint8_t bus, uint32_t device, bool external);
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virtual ~BMP280_I2C() = default;
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bool is_external();
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int init();
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uint8_t get_reg(uint8_t addr);
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int set_reg(uint8_t value, uint8_t addr);
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bmp280::data_s *get_data(uint8_t addr);
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bmp280::calibration_s *get_calibration(uint8_t addr);
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private:
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struct bmp280::calibration_s _cal;
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struct bmp280::data_s _data;
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bool _external;
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};
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bmp280::IBMP280 *bmp280_i2c_interface(uint8_t busnum, uint32_t device, bool external)
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{
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return new BMP280_I2C(busnum, device, external);
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}
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BMP280_I2C::BMP280_I2C(uint8_t bus, uint32_t device, bool external) :
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I2C("BMP280_I2C", nullptr, bus, device, 100 * 1000)
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{
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_external = external;
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}
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bool BMP280_I2C::is_external()
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{
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return _external;
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}
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int BMP280_I2C::init()
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{
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return I2C::init();
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}
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uint8_t BMP280_I2C::get_reg(uint8_t addr)
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{
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uint8_t cmd[2] = { (uint8_t)(addr), 0};
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transfer(&cmd[0], 1, &cmd[1], 1);
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return cmd[1];
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}
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int BMP280_I2C::set_reg(uint8_t value, uint8_t addr)
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{
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uint8_t cmd[2] = { (uint8_t)(addr), value};
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return transfer(cmd, sizeof(cmd), nullptr, 0);
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}
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bmp280::data_s *BMP280_I2C::get_data(uint8_t addr)
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{
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const uint8_t cmd = (uint8_t)(addr);
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if (transfer(&cmd, sizeof(cmd), (uint8_t *)&_data, sizeof(struct bmp280::data_s)) == OK) {
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return (&_data);
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} else {
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return nullptr;
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}
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}
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bmp280::calibration_s *BMP280_I2C::get_calibration(uint8_t addr)
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{
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const uint8_t cmd = (uint8_t)(addr) ;
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if (transfer(&cmd, sizeof(cmd), (uint8_t *)&_cal, sizeof(struct bmp280::calibration_s)) == OK) {
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return &(_cal);
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} else {
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return nullptr;
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}
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}
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#endif /* PX4_I2C_OBDEV_BMP280 || PX4_I2C_EXT_OBDEV_BMP280 */
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