2 /// Copyright (C) 2015, 2016 "IoT.bzh"
3 /// Author "Romain Forlot" <romain.forlot@iot.bzh>
5 /// Licensed under the Apache License, Version 2.0 (the "License");
6 /// you may not use this file except in compliance with the License.
7 /// You may obtain a copy of the License at
9 /// http://www.apache.org/licenses/LICENSE-2.0
11 /// Unless required by applicable law or agreed to in writing, software
12 /// distributed under the License is distributed on an "AS IS" BASIS,
13 /// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 /// See the License for the specific language governing permissions and
15 /// limitations under the License.
26 #include "openxc.pb.h"
27 #include "message-definition.hpp"
28 #include "../utils/timer.hpp"
29 #include "../diagnostic/diagnostic-message.hpp"
31 #define MESSAGE_SET_ID 0
35 /// @brief The type signature for a CAN signal decoder.
37 /// A signal_decoder transforms a raw floating point CAN signal into a number,
38 /// string or boolean.
40 /// @param[in] signal - The CAN signal that we are decoding.
41 /// @param[in] message - The message with data to decode.
42 /// @param[out] send - An output parameter. If decoding fails or CAN signal is
43 /// not sending, this should be flipped to false.
45 /// @return a decoded value in an openxc_DynamicField struct.
47 typedef openxc_DynamicField (*signal_decoder)(signal_t& signal, std::shared_ptr<message_t> message, bool* send);
50 /// @brief: The type signature for a CAN signal encoder.
52 /// A signal_encoder transforms a number, string or boolean into a raw floating
53 /// point value that fits in the CAN signal.
55 /// @param[in] signal - The CAN signal to encode.
56 /// @param[in] value - The dynamic field to encode.
57 /// @param[out] send - An output parameter. If the encoding failed or the CAN signal should
58 /// not be encoded for some other reason, this will be flipped to false.
60 typedef uint64_t (*signal_encoder)(signal_t& signal,
61 const openxc_DynamicField& field, bool* send);
67 std::shared_ptr<message_definition_t> parent_; /*!< parent_ - pointer to the parent message definition holding this signal*/
68 std::string generic_name_; /*!< generic_name_ - The name of the signal to be output.*/
69 static std::string prefix_; /*!< prefix_ - generic_name_ will be prefixed with it. It has to reflect the used protocol.
70 * which make easier to sort message when the come in.*/
71 uint32_t bit_position_; /*!< bitPosition_ - The starting bit of the signal in its CAN message (assuming
72 * non-inverted bit numbering, i.e. the most significant bit of
74 uint32_t bit_size_; /*!< bit_size_ - The width of the bit field in the CAN message. */
75 float factor_; /*!< factor_ - The final value will be multiplied by this factor. Use 1 if you
76 * don't need a factor. */
77 float offset_; /*!< offset_ - The final value will be added to this offset. Use 0 if you
78 * don't need an offset. */
79 float min_value_; /*!< min_value_ - The minimum value for the processed signal.*/
80 float max_value_; /*!< max_value_ - The maximum value for the processed signal. */
81 frequency_clock_t frequency_; /*!< frequency_ - A frequency_clock_t struct to control the maximum frequency to
82 * process and send this signal. To process every value, set the
83 * clock's frequency to 0. */
84 bool send_same_; /*!< send_same_ - If true, will re-send even if the value hasn't changed.*/
85 bool force_send_changed_; /*!< force_send_changed_ - If true, regardless of the frequency, it will send the
86 * value if it has changed. */
87 std::map<uint8_t, std::string> states_; /*!< states_ - A map of CAN signal state describing the mapping
88 * between numerical and string values for valid states. */
89 bool writable_; /*!< writable - True if the signal is allowed to be written from the USB host
90 * back to CAN. Defaults to false.*/
91 signal_decoder decoder_; /*!< decoder_ - An optional function to decode a signal from the bus to a human
92 * readable value. If NULL, the default numerical decoder is used. */
93 signal_encoder encoder_; /*!< encoder_ - An optional function to encode a signal value to be written to
94 * CAN into a byte array. If NULL, the default numerical encoder
96 bool received_; /*!< received_ - True if this signal has ever been received.*/
97 float last_value_; /*!< lastValue_ - The last received value of the signal. If 'received' is false,
98 * this value is undefined. */
99 std::pair<bool,int> multiplex_; /*!< multiplex_ - If bool is false and int is 0 is not a multiplex signal
100 If bool is true, that indicate that is a multiplexor
101 If int is different of 0, that indicate the link with a multiplexor */
102 bool is_big_endian_; /*!< is_big_endian - True if the signal's data are meant to be read as a big_endian */
103 bool is_signed_; /* !< is_signed_ - True if the data is signed */
104 std::string unit_; /* !< unit_ - The unit of the data */
109 std::string generic_name,
110 uint32_t bit_position,
116 frequency_clock_t frequency,
118 bool force_send_changed,
119 std::map<uint8_t, std::string> states,
121 signal_decoder decoder,
122 signal_encoder encoder,
124 std::pair<bool,int> multiplex,
131 std::string generic_name,
132 uint32_t bit_position,
138 frequency_clock_t frequency,
140 bool force_send_changed,
141 std::map<uint8_t, std::string> states,
143 signal_decoder decoder,
144 signal_encoder encoder,
148 std::shared_ptr<message_definition_t> get_message() const;
149 const std::string get_generic_name() const;
150 const std::string get_name() const;
151 uint32_t get_bit_position() const;
152 uint32_t get_bit_size() const;
153 float get_factor() const;
154 float get_offset() const;
155 frequency_clock_t& get_frequency();
156 bool get_send_same() const;
157 const std::string get_states(uint8_t value);
158 uint64_t get_states(const std::string& value) const;
159 bool get_writable() const;
160 signal_decoder& get_decoder();
161 signal_encoder& get_encoder();
162 bool get_received() const;
163 float get_last_value() const;
164 std::pair<float, uint64_t> get_last_value_with_timestamp() const;
165 std::pair<bool,int> get_multiplex() const;
166 bool get_is_big_endian() const;
167 bool get_is_signed() const;
168 const std::string get_unit() const;
170 void set_parent(std::shared_ptr<message_definition_t> parent);
171 void set_received(bool r);
172 void set_last_value(float val);
173 void set_timestamp(uint64_t timestamp);