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
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136 | -- TMP102 temperature sensor services
-- Copyright (C)2016-2023, Philip Munts dba Munts Technologies.
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions are met:
--
-- * Redistributions of source code must retain the above copyright notice,
-- this list of conditions and the following disclaimer.
--
-- 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 HOLDER 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.
WITH Ada.Unchecked_Conversion;
WITH Temperature;
USE TYPE Temperature.Celsius;
PACKAGE BODY TMP102 IS
-- Conversions between RegisterData and Celsius require an
-- intermediate signed integer step
TYPE SignedRegisterData IS RANGE -32768 .. 32767;
FOR SignedRegisterData'Size USE 16;
FUNCTION ToSigned IS NEW
Ada.Unchecked_Conversion
(Source => RegisterData,
Target => SignedRegisterData);
FUNCTION ToUnsigned IS NEW
Ada.Unchecked_Conversion
(Source => SignedRegisterData,
Target => RegisterData);
-- Object constructor
FUNCTION Create
(bus : NOT NULL I2C.Bus;
addr : I2C.Address) RETURN Device IS
d : Device;
BEGIN
d := NEW DeviceSubclass'(bus, addr);
d.WriteRegister(ConfigReg, CONFIG_FAULTS_1 OR CONFIG_1HZ);
RETURN d;
END Create;
-- Read TMP102 register
PROCEDURE ReadRegister
(Self : DeviceSubclass;
reg : RegisterName;
data : OUT RegisterData) IS
cmd : I2C.Command(0 .. 0);
resp : I2C.Response(0 .. 1);
BEGIN
cmd(0) := I2C.Byte(RegisterName'Pos(reg));
Self.bus.Transaction(Self.address, cmd, 1, resp, 2);
data := RegisterData(resp(0))*256 + RegisterData(resp(1));
END ReadRegister;
-- Write TMP102 register
PROCEDURE WriteRegister
(Self : DeviceSubclass;
reg : RegisterName;
data : RegisterData) IS
cmd : I2C.Command(0 .. 2);
BEGIN
cmd(0) := I2C.Byte(RegisterName'Pos(reg));
cmd(1) := I2C.Byte(data / 256);
cmd(2) := I2C.Byte(data MOD 256);
Self.bus.Write(Self.address, cmd, 3);
END WriteRegister;
-- Configure the alert output pin
PROCEDURE ConfigureAlert
(Self : DeviceSubclass;
mode : AlertMode;
polarity : AlertPolarity;
lowtemp : Temperature.Celsius;
hightemp : Temperature.Celsius) IS
config : RegisterData;
BEGIN
Self.ReadRegister(ConfigReg, config);
IF mode = Interrupt THEN
config := config OR CONFIG_TM;
ELSE
config := config AND NOT CONFIG_TM;
END IF;
IF polarity = ActiveHigh THEN
config := config OR CONFIG_POL;
ELSE
config := config AND NOT CONFIG_POL;
END IF;
Self.WriteRegister(ConfigReg, config);
Self.WriteRegister(LowLimit, RegisterData(ToUnsigned(SignedRegisterData(lowtemp/SCALE_FACTOR))));
Self.WriteRegister(HighLimit, RegisterData(ToUnsigned(SignedRegisterData(hightemp/SCALE_FACTOR))));
END ConfigureAlert;
-- Sample TMP102 temperature
FUNCTION Get(Self : IN OUT DeviceSubclass) RETURN Temperature.Celsius IS
rawtemp : RegisterData;
BEGIN
Self.ReadRegister(TempReg, rawtemp);
RETURN Temperature.Celsius(ToSigned(rawtemp))*SCALE_FACTOR;
END Get;
END TMP102;
|