main.c
2.36 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
/*
* Copyright (C) 2016 Bas Stottelaar <basstottelaar@gmail.com>
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @ingroup tests
* @{
*
* @file
* @brief Test application for the Si7006/13/20/21 sensor driver
*
* @author Bas Stottelaar <basstottelaar@gmail.com>
*
* @}
*/
#ifndef TEST_I2C
#error "TEST_I2C not defined"
#endif
#ifndef TEST_I2C_ADDR
#error "TEST_I2C_ADDR not defined"
#endif
#ifndef TEST_PIN_EN
#error "TEST_PIN_EN not defined"
#endif
#include <stdio.h>
#include "periph/gpio.h"
#include "xtimer.h"
#include "si70xx.h"
int main(void)
{
si70xx_t dev;
puts("SI7021 temperature and humidity sensor test application\n");
/* enable the sensor if test pin given */
if (TEST_PIN_EN != GPIO_UNDEF) {
printf("Toggling enable pin...");
if (gpio_init(TEST_PIN_EN, GPIO_OUT) == 0) {
puts("[OK]\n");
}
else {
puts("[Failed]\n");
return 1;
}
gpio_set(TEST_PIN_EN);
}
/* initialize the sensor */
printf("Initializing sensor...");
if (si70xx_init(&dev, TEST_I2C, TEST_I2C_ADDR) == 0) {
puts("[OK]\n");
}
else {
puts("[Failed]");
return 1;
}
/* run sensor test */
printf("Testing sensor communication...");
if (si70xx_test(&dev) == 0) {
puts("[OK]\n");
}
else {
puts("[Failed]");
return 1;
}
/* print device id */
printf("Identified sensor as the Si70%02i\n", si70xx_get_id(&dev));
/* read temperature and humidity every 1 seconds */
bool both = false;
int16_t temperature;
uint16_t humidity;
while (1) {
/* rotate the way of getting the data */
if (both) {
si70xx_get_both(&dev, &humidity, &temperature);
}
else {
temperature = si70xx_get_temperature(&dev);
humidity = si70xx_get_relative_humidity(&dev);
}
both = !both;
/* display results */
printf("relative humidity: %d.%02d\n", humidity / 100, humidity % 100);
printf("temperature: %d.%02d C\n", temperature / 100, temperature % 100);
/* sleep between measurements */
xtimer_usleep(1000 * MS_IN_USEC);
}
return 0;
}