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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
///
/// Copyright (C) 2015, 2016 "IoT.bzh"
/// Author "Romain Forlot" <romain.forlot@iot.bzh>
///
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///
/// http://www.apache.org/licenses/LICENSE-2.0
///
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
///
#pragma once
#include <map>
#include <mutex>
#include <vector>
#include <string>
#include <memory>
#include "openxc.pb.h"
#include "message-definition.hpp"
#include "../utils/timer.hpp"
#include "../diagnostic/diagnostic-message.hpp"
#define MESSAGE_SET_ID 0
class signal_t;
///
/// @brief The type signature for a CAN signal decoder.
///
/// A signal_decoder transforms a raw floating point CAN signal into a number,
/// string or boolean.
///
/// @param[in] signal - The CAN signal that we are decoding.
/// @param[in] message - The message with data to decode.
/// @param[out] send - An output parameter. If decoding fails or CAN signal is
/// not sending, this should be flipped to false.
///
/// @return a decoded value in an openxc_DynamicField struct.
///
typedef openxc_DynamicField (*signal_decoder)(signal_t& signal, std::shared_ptr<message_t> message, bool* send);
///
/// @brief: The type signature for a CAN signal encoder.
///
/// A signal_encoder transforms a number, string or boolean into a raw floating
/// point value that fits in the CAN signal.
///
/// @param[in] signal - The CAN signal to encode.
/// @param[in] value - The dynamic field to encode.
/// @param[out] send - An output parameter. If the encoding failed or the CAN signal should
/// not be encoded for some other reason, this will be flipped to false.
///
typedef uint64_t (*signal_encoder)(signal_t& signal,
const openxc_DynamicField& field, bool* send);
enum sign_t
{
UNSIGNED = 0,
SIGN_BIT = 1,
ONES_COMPLEMENT = 2,
TWOS_COMPLEMENT = 3,
SIGN_BIT_EXTERN = 4
};
class signal_t
{
private:
std::shared_ptr<message_definition_t> parent_; /*!< parent_ - pointer to the parent message definition holding this signal*/
std::string generic_name_; /*!< generic_name_ - The name of the signal to be output.*/
static std::string prefix_; /*!< prefix_ - generic_name_ will be prefixed with it. It has to reflect the used protocol.
* which make easier to sort message when the come in.*/
uint32_t bit_position_; /*!< bitPosition_ - The starting bit of the signal in its CAN message (assuming
* non-inverted bit numbering, i.e. the most significant bit of
* each byte is 0) */
uint32_t bit_size_; /*!< bit_size_ - The width of the bit field in the CAN message. */
float factor_; /*!< factor_ - The final value will be multiplied by this factor. Use 1 if you
* don't need a factor. */
float offset_; /*!< offset_ - The final value will be added to this offset. Use 0 if you
* don't need an offset. */
float min_value_; /*!< min_value_ - The minimum value for the processed signal.*/
float max_value_; /*!< max_value_ - The maximum value for the processed signal. */
frequency_clock_t frequency_; /*!< frequency_ - A frequency_clock_t struct to control the maximum frequency to
* process and send this signal. To process every value, set the
* clock's frequency to 0. */
bool send_same_; /*!< send_same_ - If true, will re-send even if the value hasn't changed.*/
bool force_send_changed_; /*!< force_send_changed_ - If true, regardless of the frequency, it will send the
* value if it has changed. */
std::map<uint8_t, std::string> states_; /*!< states_ - A map of CAN signal state describing the mapping
* between numerical and string values for valid states. */
bool writable_; /*!< writable - True if the signal is allowed to be written from the USB host
* back to CAN. Defaults to false.*/
signal_decoder decoder_; /*!< decoder_ - An optional function to decode a signal from the bus to a human
* readable value. If NULL, the default numerical decoder is used. */
signal_encoder encoder_; /*!< encoder_ - An optional function to encode a signal value to be written to
* CAN into a byte array. If NULL, the default numerical encoder
* is used. */
bool received_; /*!< received_ - True if this signal has ever been received.*/
float last_value_; /*!< lastValue_ - The last received value of the signal. If 'received' is false,
* this value is undefined. */
std::pair<bool, int> multiplex_; /*!< multiplex_ - If bool is false and int is 0 is not a multiplex signal
If bool is true, that indicate that is a multiplexor
If int is different of 0, that indicate the link with a multiplexor */
bool is_big_endian_; /*!< is_big_endian - True if the signal's data are meant to be read as a big_endian */
sign_t sign_; /* !< sign_ - if the data is signed it indicates the encode */
int32_t bit_sign_position_; /*!< bit_sign_position_ - The bit that indicates the sign of the signal in its CAN message*/
std::string unit_; /* !< unit_ - The unit of the data */
bool bit_position_is_swapped_; /* !<bit_position_is_swapped_- True if the signal's bit position has been
swapped (refer to converter_t::bit_position_swap()). Default is false.*/
public:
signal_t(
std::string generic_name,
uint32_t bit_position,
uint32_t bit_size,
float factor,
float offset,
float min_value,
float max_value,
frequency_clock_t frequency,
bool send_same,
bool force_send_changed,
std::map<uint8_t, std::string> states,
bool writable,
signal_decoder decoder,
signal_encoder encoder,
bool received,
std::pair<bool, int> multiplex,
bool is_big_endian,
sign_t sign,
int32_t bit_sign_position,
std::string unit);
signal_t(
std::string generic_name,
uint32_t bit_position,
uint32_t bit_size,
float factor,
float offset,
float min_value,
float max_value,
frequency_clock_t frequency,
bool send_same,
bool force_send_changed,
std::map<uint8_t, std::string> states,
bool writable,
signal_decoder decoder,
signal_encoder encoder,
bool received);
std::shared_ptr<message_definition_t> get_message() const;
const std::string get_generic_name() const;
const std::string get_name() const;
uint32_t get_bit_position() const;
uint32_t get_bit_size() const;
float get_factor() const;
float get_offset() const;
frequency_clock_t& get_frequency();
bool get_send_same() const;
const std::string get_states(uint8_t value);
uint64_t get_states(const std::string& value) const;
bool get_writable() const;
signal_decoder& get_decoder();
signal_encoder& get_encoder();
bool get_received() const;
float get_last_value() const;
std::pair<float, uint64_t> get_last_value_with_timestamp() const;
std::pair<bool, int> get_multiplex() const;
bool get_is_big_endian() const;
sign_t get_sign() const;
int32_t get_bit_sign_position() const;
const std::string get_unit() const;
bool bit_position_is_swapped() const;
void set_parent(std::shared_ptr<message_definition_t> parent);
void set_received(bool r);
void set_last_value(float val);
void set_timestamp(uint64_t timestamp);
void set_bit_position(uint32_t bit_position);
void bit_position_is_swapped_reverse();
};
|
