CAN FD Log
Log received CAN FD messages
Vehicle Network Toolbox / CAN FD Communication
The CAN FD Log block logs CAN FD messages from the CAN network, or messages
sent to the block input port, to a
.mat file. You can load the saved
messages into MATLAB® for further analysis or into another Simulink® model.
Configure your CAN FD Log block to log from the Simulink input port. For more information, see Log and Replay CAN Messages.
The CAN FD Log block appends the specified filename with the current date and time, creating unique log files for repeated logging.
If you want to use messages logged using Simulink blocks in the MATLAB Command window, use
convert messages to the correct format.
You need a license for both Vehicle Network Toolbox™ and Simulink software to use this block.
You cannot have more than one CAN FD Log block in a model using the same PEAK-System device channel.
Other Supported Features
The CAN FD Log block supports the use of Simulink Accelerator™ mode. Using this feature, you can speed up the execution of Simulink models. For more information on this feature, see Acceleration (Simulink).
The CAN FD Log block supports the use of code generation along with the packNGo function to group required source code and dependent shared libraries.
Vehicle Network Toolbox Simulink blocks allow you to generate code, enabling models containing these blocks to run in Accelerator, Rapid Accelerator, External, and Deployed modes.
You can use Vehicle Network Toolbox, Simulink Coder™, and Embedded Coder® software together to generate code on the host end that you can use to implement your model. For more information on code generation, see Build Process (Simulink Coder).
The block generates code with limited portability. The block uses
precompiled shared libraries, such as DLLs, to support I/O for
specific types of devices. With this block, you can use the
packNGo function supported by Simulink
Coder to set up and manage the build information for your
packNGo (Simulink Coder) function
allows you to package model code and dependent shared libraries into
a zip file for deployment. You do not need MATLAB installed on the target system, but the target system
needs to be supported by MATLAB.
To set up
In this example,
gcs is the current model that you
want to build. Building the model creates a zip file with the same
name as model name. You can move this zip file to another machine
and there build the source code in the zip file to create an
executable which can run independent of MATLAB and Simulink. The generated code compiles with both C and C++
compilers. For more information, see Build Process Customization (Simulink Coder).
On Linux® platforms, you need to add the folder where
you unzip the libraries to the environment variable
CAN Msg — CAN FD messages to log
The CAN Msg input port is available when the Log
messages from parameter is set to
Input port. Provide
an input from another block as a Simulink signal bus of type
If you are logging from the network, you need to configure your CAN channel with a CAN FD Configuration block.
File name — Log file location and name
untitled.mat (default) | file name
Enter the path and name of the MAT-file to log CAN messages to, or click Browse to browse to a file location.
The model appends the log file name with the current date and time in the format
YYYY-MMM-DD_hhmmss. Specify a unique name to differentiate between
your files for repeated logging.
Variable name — Variable name for CAN FD messages in log file
ans (default) | variable name
Specify the name for the variable saved in the MAT-file that holds the CAN message information.
Maximum number of messages to log — Limit quantity of messages
10000 (default) | numeric
Specify the maximum number of messages this block can log from the selected device
or port. The specified value must be a positive integer. The default value is
10000 messages. The log file saves the most recent messages up to
the specified maximum number.
Log messages from — Source of messages
CAN FD Bus (default) |
Select the source of the messages logged by the block. To log messages from the CAN
FD bus network, select
CAN FD Bus, then specify a
Device. To log messages from another block in the model, select
Input port, which adds an inport port to the block.
Device — CAN device and channel
Select the device on the CAN FD network that you want to log messages from. This
field is available only if you select
CAN FD Bus for the
Log messages from parameter.
Sample time — Block sampling time in simulation
0.01 (default) | numeric
Specify the sampling time of the block during simulation. This value defines the
frequency at which the CAN FD Log block runs during simulation. If the
block is inside a triggered subsystem or to inherit sample time, you can specify
–1 as the sample time. You can also specify a MATLAB variable for sample time. The default value is
simulation seconds. For more information, see Timing in Hardware Interface Models.
C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.
This block generates code with limited portability that runs only on the host computer. See Code Generation.
Introduced in R2018b