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
|
/*
* Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com>
* Contributions: Jon Trulson <jtlulson@ics.com>
* Copyright (c) 2014 Intel Corporation.
*
* Credits to Seeed Studeo.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <iostream>
#include <unistd.h>
#include <stdlib.h>
#include <stdexcept>
#include "th02.hpp"
using namespace std;
using namespace upm;
TH02::TH02 (int bus, uint8_t addr) : m_i2c(bus) {
m_addr = addr;
m_name = "TH02";
mraa::Result ret = m_i2c.address(m_addr);
if (ret != mraa::SUCCESS) {
throw std::invalid_argument(std::string(__FUNCTION__) +
": mraa_i2c_address() failed");
}
}
TH02::~TH02 () {
}
float
TH02::getTemperature () {
uint16_t temperature = 0;
/* Start a new temperature conversion */
if (m_i2c.writeReg(TH02_REG_CONFIG, TH02_CMD_MEASURE_TEMP)) {
throw std::runtime_error(std::string(__FUNCTION__) +
": I2c.writeReg() failed");
return 0.0;
}
/* Wait until conversion is done */
while (getStatus() == false);
temperature = m_i2c.readReg(TH02_REG_DATA_H) << 8;
temperature |= m_i2c.readReg(TH02_REG_DATA_L);
temperature >>= 2;
return ((float(temperature) / 32.0) - 50.0);
}
float
TH02::getHumidity () {
uint16_t humidity = 0;
/* Start a new humidity conversion */
if (m_i2c.writeReg(TH02_REG_CONFIG, TH02_CMD_MEASURE_HUMI)) {
throw std::runtime_error(std::string(__FUNCTION__) +
": I2c.writeReg() failed");
return 0.0;
}
/* Wait until conversion is done */
while (getStatus() == false);
humidity = m_i2c.readReg(TH02_REG_DATA_H) << 8;
humidity |= m_i2c.readReg(TH02_REG_DATA_L);
humidity >>= 4;
return ((float(humidity) / 16.0) - 24.0);
}
bool
TH02::getStatus () {
uint8_t status = m_i2c.readReg(TH02_REG_STATUS);
if (status & TH02_STATUS_RDY_MASK)
return false; // NOT ready
else
return true; // ready
}
|
