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At that time, CAN was the sole dominant system for in-vehicle networking. Vector played a key role in its release. The "X" stands for the variable and interchangeable transport layer. To satisfy needs for a universal communication solution in a wide variety of applications, the ASAM working group gave special attention to the following criteria:.
XCP is capable of utilizing the same protocol layer based on different transport layers. This protocol is a universal measurement and calibration protocol that operates independently of the type of network that is used.
The master and slave each communicate over the integrated XCP driver. There is an ECU description file in A2L format for each slave, which — among other things — specifies associations between symbolic variable names and their address ranges, physical meanings of the data and the checksum method used.
That is, in optimizing the control algorithms for the ECU, you can use one and the same tool, always performing similar work steps. This makes configurations, measurement data and description files usable and interchangeable throughout the development process. They include:. Request the printed version with pages in format x mm.
With full XCP supportVector offers you the right solution at every point of the development process. The XCP standard was developed with crucial input by Vector, whose extensive know-how and experience also flowed into comprehensive support of the measurement and calibration protocol:. The goal of this seminar is to explain the mechanisms and models that form the foundation of XCP.Several XETK data lines can be connected to a host computer through a network module.
This option is of interest in the calibration of systems which are either distributed across several ECUs or implemented by an ECU equipped with several processors. Search Portfolio. OEM-Specific Software. RTA Software Products. Hardware Products.
ASAM MCD-1 XCP
ES — Measurement Modules. ES — Prototyping and Interface Modules. Lambda Modules. Measurement Probes and Cables. Cables and Connectors. Engineering Services. Consulting Services. Security Solutions. Calibrating Automotive Electronics. Vehicle Testing. Process Integration. Test Bench Applications. Model-based Calibration. Electric and Hybrid Drive. Isolating Measurement Probes. Rapid Function Development.Kvaser reached out to me about writing a sponsored post to put on this site. I have used many Kvaser CAN interfaces in the past.
Since they work well and are reliable I agreed. This is my first time accepting a sponsored post and is the only post on this site that I did not write.
If you like or do not like this let me know in the comments below. It is because of this that the protocol is can be used for data collection and calibration across a variety of industries. CAN contains five different error checks throughout the communication protocol to ensure data are transmitted correctly. If an error is detected, CAN will retransmit the data until they are received without error. Partially because of the robustness of the system, CAN has become the standard within the automotive industry and a compelling choice for autonomous systems in robotics.
During transmission, messages are tested for errors by each CAN controller connected to the common bus line. Each message in a CAN bus is given a priority, with error messages ranking as the highest priority. If an error condition occurs, the CAN frame is interrupted to force retransmission as soon as possible. However, this protocol can be used in other industries, like robotics, for microcontroller development and similar functions.
CCP is used to support the following functions:. This connection will continue until a disconnect command or new slave node appears. The master controls all communication between the two. Every reply from slave to master will contain either data or an error code. After the configuration all exchange is a write and read of the memory. This function is used when programming the ECU or to read and write larger sections of the memory. By this function it is possible to read or write a number of parameters in a data structure that fits into a data-package 8 byte in CAN.
This function is used to set and get parameters without any knowledge about the actual location in a memory map. This is used to read back some internal parameters and adjust controllable parameters to calibrate the ECU to the best behavior.
This robot was considered revolutionary because of its ability to use verbal and non-verbal communication.The channel runs the executable file in real time and is created by the build and code generation process.
You can use the channel to:. This video shows how to use Simulink to tune and log data from a generated executable running on your PC or hardware using external mode. External mode simulation helps you establish a communication channel between the assembling model and the target hardware. It runs the executable file in real time created by the build and code generation process. The communication channel could be the universal measurement and calibration protocol.
That is, XCP. You can tune parameters in real time with dashboard blocks and monitor lock signal data from the executing target application. You can also stream data to the simulation data inspector or logic analyzer. Additionally, you can stream signals for reference model from within a model hierarchy. Now let us prepare this fault-tolerant fuel system model for external mode simulation. Let me start the preparation by opening the abstract on the Simulink tool strip.
Let me click Run on custom hardware. Over here, I can use the grt. OK, now let's go to the Solver pane. To specify the value for fixed-step size field, in the Optimization pane, make sure the default parameter behavior is set to tunable. XCP uses the static memory allocator on the target. This static memory buffer size value specifies the size of XCP slave memory that is allocated for signal logging.
Let's use the default value for the demo. OK, now we are all set with the configuration.
Let's save these settings and the model. Now build a target application using this button. Looks like building is done, along with the code generation. Now let's run the application on the target by clicking this Deploy button.
Now we can connect Simulink to our waiting or running target application. At last, let's start real time execution of the generated code in this target environment. Here you can queue in the parameters using these dashboard blocks.
Let me open the assimilation data inspector to view the stream signals. You can also view the same signals using Logic Analyzer as well.
You can also do the simulation by a single click on this Monitor and Tune button. Then enable ASAP2 interface option.Tests with ECU hardware and software in the loop are carried out.
ECU internal variables and external sensor data is recorded and analyzed. The values of internal ECU parameters are determined as a result of this process. The first version 1. The latest and current version 2. Since then, the protocol has widely spread and is supported by many tools on the market. Basically all leading tools in the The process of recording data from internal ECU memory and external sensors. Over the years, only extensions were added, which do not break the compatibility to earlier versions.
Essentially, the protocol supports all typical The process of ECU parameter tuning. Two typical customer-supplier collaboration scenarios are supported:. Besides The process of recording data from internal ECU memory and external sensors. Read access, commonly called " The process of recording data from internal ECU memory and external sensors. ECUs are systems with discrete time behavior, whose variables only change at specific time intervals.
This time or event driven access, commonly called "event-synchronous The process of recording data from internal ECU memory and external sensors. The access is address-oriented meaning the communication between master i. So, the The process of recording data from internal ECU memory and external sensors. Write access, commonly called " The process of ECU parameter tuning. The The process of ECU parameter tuning. This means that access to a specific parameter does not need to be hardcoded into the ECU application.
Different The process of ECU parameter tuning. A slave may only communicate with one master at any given time. On the other hand, the master can simultaneously communicate with many slaves. For example, the master initiates contact in this direction.
The Universal Measurement and Calibration Protocol ASAM Standard XCP A public specification, which has been developed by experts in a defined consensus-driven development process and was released by officials that represent a significant share of the industry for which it is targeted, giving the specification the necessary legitimacy to be called a 'Standard'.
In order to speed up memory downloads, the The process of ECU parameter tuning.It enables read and write access to variables and memory contents of microcontroller systems at runtime. Entire datasets can be acquired or stimulated synchronous to events triggered by timers or operating conditions. In addition, XCP also supports programming of flash memory. The first letter X in XCP expresses the fact that the protocol is designed for a variety of bus systems.
At that time, CAN was the dominant networking system in the automobile industry. In addition, XCP supports synchronous and asynchronous serial interfaces.
Due to its broad range of use, a primary goal in the development of XCP was to achieve as lean an implementation in the ECU as possible and high scalability of features and resource utilization. XCP always uses the same protocol layer independent of the transport layer. In addition to supporting other transport layers, the successor to the CCP protocol contains many functional improvements such as: .
Because the A2L format file contains all the information to access the information, the ECU code does not have to be recompiled to access different measurements or calibrations.
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In an external mode simulation, you can tune parameters in real time and monitor target application signals. Using the Run on Custom Hardware app, you can set up and run on your development computer or custom hardware external mode simulations that use an XCP communication channel. Configure and run an external mode simulation that uses the XCP communication protocol.
During the simulation:. Create a folder for this example. Open Simulink and create a simple model, xcpExamplewhich contains these blocks:. Double-click the Sine Wave block.
Set Sample time to 0. Double-click the Gain block. Set Gain to 2, and then click OK. Connect the Gain block to the Scope block and name the connection, for example, Output Signal. On the Signal tab, in the Monitor section, select Log Signals.CAN Bus Explained - A Simple Intro (2020)
Configure the Half Gauge block to monitor the value of Test Signal :. In the Maximum field, enter a value, for example, 1. Configure the Knob block to tune the Amplitude parameter of the Sine Wave block:. Connect the block to the Amplitude parameter of the Sine Wave block. In the Minimum and Maximum fields, enter values, for example, 0.
On the Run on Custom Hardware pop-up dialog box, click Finish. In the Hardware section, specify the system target file.
For this example, use the default, grt. The Configuration Parameters dialog box opens, displaying Hardware Implementation settings that are determined by the system target file. In the Type field, specify Fixed-step.
Under Solver detailsin the Fixed-step size field, specify a value, for example, 0. You cannot disable the Static memory allocation check box.
The Static memory buffer size value specifies the size of XCP slave memory that is allocated for signal logging. For this example, use the default value. If System target file is ert. Select the Generate an example main program check box. Set Target operating system to BareBoardExample. To specify a nondefault value for the simulation stop time, in the Stop Time field, specify your value, for example, inf.
The software:. Runs the target application as separate process on your development computer.