BMP280_I2C.cpp
3.54 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
/****************************************************************************
*
* Copyright (c) 2016-2019 PX4 Development Team. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name PX4 nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/**
* @file bmp280_spi.cpp
*
* SPI interface for BMP280
*/
#include "bmp280.h"
#include <px4_platform_common/px4_config.h>
#include <drivers/device/i2c.h>
class BMP280_I2C: public device::I2C, public bmp280::IBMP280
{
public:
BMP280_I2C(uint8_t bus, uint32_t device, int bus_frequency);
virtual ~BMP280_I2C() override = default;
int init() override { return I2C::init(); }
uint8_t get_reg(uint8_t addr) override;
int set_reg(uint8_t value, uint8_t addr) override;
bmp280::data_s *get_data(uint8_t addr) override;
bmp280::calibration_s *get_calibration(uint8_t addr) override;
uint32_t get_device_id() const override { return device::I2C::get_device_id(); }
uint8_t get_device_address() const override { return device::I2C::get_device_address(); }
private:
bmp280::calibration_s _cal{};
bmp280::data_s _data{};
};
bmp280::IBMP280 *bmp280_i2c_interface(uint8_t busnum, uint32_t device, int bus_frequency)
{
return new BMP280_I2C(busnum, device, bus_frequency);
}
BMP280_I2C::BMP280_I2C(uint8_t bus, uint32_t device, int bus_frequency) :
I2C(DRV_BARO_DEVTYPE_BMP280, MODULE_NAME, bus, device, bus_frequency)
{
}
uint8_t
BMP280_I2C::get_reg(uint8_t addr)
{
uint8_t cmd[2] = { (uint8_t)(addr), 0};
transfer(&cmd[0], 1, &cmd[1], 1);
return cmd[1];
}
int
BMP280_I2C::set_reg(uint8_t value, uint8_t addr)
{
uint8_t cmd[2] = { (uint8_t)(addr), value};
return transfer(cmd, sizeof(cmd), nullptr, 0);
}
bmp280::data_s *
BMP280_I2C::get_data(uint8_t addr)
{
const uint8_t cmd = addr;
if (transfer(&cmd, sizeof(cmd), (uint8_t *)&_data, sizeof(bmp280::data_s)) == OK) {
return (&_data);
} else {
return nullptr;
}
}
bmp280::calibration_s *
BMP280_I2C::get_calibration(uint8_t addr)
{
const uint8_t cmd = addr;
if (transfer(&cmd, sizeof(cmd), (uint8_t *)&_cal, sizeof(bmp280::calibration_s)) == OK) {
return &(_cal);
} else {
return nullptr;
}
}