Requirements on I/O Hardware Abstraction, No.75, 2021-11
AUTOSAR R21-11記事一覧はこちら。
AUTOSAR 21-11,160文書読んだ。2022年5月中に全部読み。
AUTOSAR 21-11, 62文書読んだ。2022年5月中に半分到達予定。
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用語(terms)
| Term | Description | Example |
|---|---|---|
| Class | A class represents a kind of electrical connection to the ECU. It could be for example an analogue, a discrete,… | Analogue Class, Discrete Class… |
| Electrical Signal | It is the electrical signal on the pin of the ECU | Physical input voltage at an ECUPin |
| ECU pin | It is an hardware electrical connection of the ECU with the rest of the electronic system | |
| ECU Signals | It is the software representation of an electrical signal. A signal has attributes and a symbolic name | Input voltage,Discrete Output, PWM Input … |
| ECU Signal group | It is the software representation of a group of electrical signals from the same Class | Only for discrete Inputs and discrete Outputs |
| Attributes | Characteristics that can be Software (SW) and Hardware (HW) for each kind of Signals existing in a ECU | Range, Lifetime / delay, … |
| Symbolic name | The symbolic name of a signal is used by the IO Hardware Abstraction module to make a link (function, pin) | |
| Data Type | Analogue: Datatype of the signal Discrete: either bool or AUTOSAR defined type (BoolType) | (VoltageType, CurrentType, ResistanceType, BoolType) Each DataType has a given size: 16 bits or 32 bits |
| Range | This is a functional range and not an electrical range.) For analogue signals [lowerLimit...upperLimit] (Voltage, current), [0...upperLimit] (resistance) For discrete signals [0,1] For timing signals [0…upperLimit] (period), [- 100…100%] (Duty Cycle) | [-12Volts...+12Volts] (voltage) |
| Resolution | This attribute for many Classes is dependent on the range and the Data Type. Example: (upperLimit - lowerLimit) / (2datatypelength -1) For the others is known and defined. | Voltagemin = -12 Volts Voltagemax = 12 Volts Data Type : 16 bits Resolution => 24 / 65535 |
| Hardware Resolution | This is the maximum possible resolution of the hardware (ADC) | ADC converter could have a 8/10/12/16 bits resolution |
| Hardware Accuracy | This is the accuracy of Hardware. It depends on hardware peripheral used for acquisition and/or generation | ADC converter could have an accuracy of +-3LSB |
| Accuracy | It depends of hardware peripheral used for acquisition and/or generation. | ADC converter could be a a 8/10/12/16 bits converter |
| Diagnosis | Diagnosis capability of the functionality | Diagnosis Not Supported (could be a static check) No valid information available Short to Power Supply Short to Ground Open Load Over Temperature Diagnosis OK |
| Synchronization | A signal could be synchronize with another signal or with an event like a trigger | If a discrete signal is “TRUE”, acquire an analogue signal |
| Access | Defines if the Signal is attached to a Get(Read) / Set(Write) feature. | |
| Inversion | Inversion between the physical value and the logical value. This attribute is not visible and not configurable by users of IO Hardware Abstraction. | Physical HighState -> (Signal=False) Physical LowState -> (Signal=True) |
| Lifetime | Only for Inputs: It is the maximum allowed age of the data (time is in microseconds). If Lifetime is 0, then the signal is directly get from the register. | Lifetime = 0 is a direct access Lifetime = 1000µs the value read is at maximum 1ms older |
| Delay | Only for Outputs: It is the maximum allowed time until an output is actually set (time is in microseconds) If Delay is 0, then the signal is set immediately | Delay = 0 is a direct access Delay = 100µs the command is set until 100µs elapse |
| Filtering /Debouncing | It defines if the Signal is provided as a raw value or if a filtering/debouncing method is included in the IO Hardware Abstraction module for this Signal. | Raw, Debounce 3 Samples, Wait 10ms, |
| Sampling Rate | Time period required to get a Signal value. | Sampling rate for a sampling windows (burst) |
| Report Changes | This attribute is only applicable to Discrete Inputs. It defines the capability (or not) of reporting level changes. | Enable or Disable |
| Pulse Test | This attribute means that the output shall be | tested thanks a dedicated pulse. If this attribute is not set, diagnosis will be done while using the output. |
英日
日本語は仮訳
T.B.D.
参考(reference)
[1] Layered Software Architecture
AUTOSAR_EXP_LayeredSoftwareArchitecture.pdf
[2] Software Standardization Template
AUTOSAR_TPS_StandardizationTemplate.pdfAUTOSAR 英語 単語帳 参考文献 AdventCalendar2022