summaryrefslogtreecommitdiff
path: root/src/driver/lm75.cc
blob: 8aab05d8595c58b4b6f38a3a11172d97e3c1273c (plain)
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
/*
 * Copyright 2020 Daniel Friesel
 *
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Driver for LM75B Digital Temperature Sensor and Thermal Watchdog.
 */
#include "driver/lm75.h"
#if defined(MULTIPASS_ARCH_HAS_I2C) && !defined(CONFIG_driver_softi2c)
#include "driver/i2c.h"
#else
#include "driver/soft_i2c.h"
#endif

#include <stdint.h>

float LM75::getTemp()
{
	txbuf[0] = 0;
	rxbuf[0] = 0;
	rxbuf[1] = 0;
	i2c.xmit(address, 1, txbuf, 2, rxbuf);

	return (int8_t)rxbuf[0] + (rxbuf[1] / 256.0);
}

unsigned int LM75::getOS()
{
	txbuf[0] = 0x03;
	rxbuf[0] = 0;
	rxbuf[1] = 0;
	i2c.xmit(address, 1, txbuf, 2, rxbuf);
	return rxbuf[0];
}

unsigned int LM75::getHyst()
{
	txbuf[0] = 0x02;
	rxbuf[0] = 0;
	rxbuf[1] = 0;
	i2c.xmit(address, 1, txbuf, 2, rxbuf);
	return rxbuf[0];
}

void LM75::setOS(signed char os)
{
	txbuf[0] = 0x03;
	txbuf[1] = os;
	txbuf[2] = 0;
	i2c.xmit(address, 3, txbuf, 0, rxbuf);
}

void LM75::setHyst(signed char hyst)
{
	txbuf[0] = 0x02;
	txbuf[1] = hyst;
	txbuf[2] = 0;
	i2c.xmit(address, 3, txbuf, 0, rxbuf);
}

void LM75::init()
{
	txbuf[0] = 0x01;
	txbuf[1] = 0x00;
	i2c.xmit(address, 2, txbuf, 0, rxbuf);
}

void LM75::shutdown()
{
	txbuf[0] = 0x01;
	txbuf[1] = 0x01;
	i2c.xmit(address, 2, txbuf, 0, rxbuf);
}

LM75 lm75(0x48);