After logging is complete, you can open MAT-files in MATLAB®, and use them for further analysis. Since the data points are stored in MAT files, you can directly open the files in MATLAB without converting them into any other format.
In your target hardware, go to the location specified in Simulation > Model Configuration Parameters > Hardware Implementation > Target hardware resources > Build options > Build directory. The default location where the MAT-files are saved is
The files are named as
The name of your Simulink® model is
runnumber is the number
of times the model is run.
runnumber starts with
1 and is incremented by one for every successive run.
indexnumber is the MAT-file number in a run.
indexnumber starts with
1 and is
incremented by one for every new file that is created in the same
Suppose that the name of the model is
sdcard. In the
first run, Simulink creates
sdcard_1_1.mat file and starts logging data in this
file. After the logging in the first file is completed, Simulink creates
sdcard_1_2.mat file and continues logging data in
this file. Likewise, the logging continues in mutiple MAT-files until the
Simulation stop time is elapsed. If the same model
is run again, the new files are named as
sdcard_2_2.mat, and so on.
Data loss occurs when:
The total file size exceeds the available SD card storage capacity.
The signal logging rate is faster than the SD card writing speed.
Create a raspberrypi object. In the MATLAB command window, type this command.
r = raspberrypi(<IPaddress>,<username>,<password>)
The parameters specified in this command must match the board parameters specified in Simulation > Model Configuration Parameters > Hardware Implementation > Hardware board settings > Target hardware resources > Board Parameters.
To copy a MAT-file from the target hardware to the computer, use the
r specifies the raspberrypi
modelname specifies the path and name of the
file on the target hardware.
To copy all the MAT-files from the target hardware to the computer specify
* in the
* copies all the files having names that start
<modelname> and ends with
After copying the files to the computer, you can use them like
conventional MAT-files. For example, you can load and plot data points using
plot commands in the
MATLAB command window.