Simulink run internal and external modes simultaneously

Hi,

I have two questions:

1. Is there a UDP receive simulink block which can be used without toolbox? Presntly I am using DSP udp receive blockset to receive data through wifi (through trial version which would soon expire) on my laptop.
2. How can I use this data to rotate the servo motor connected to arduino? Blocks for 1. is internal mode and running arduino is external?

Thanks

Answer 1

[Amish]

Hi Judah,

Unfortunately, Simulink's built-in UDP blocks, such as those in the DSP System Toolbox, require the toolbox for full functionality.

However, you can use a MATLAB Function block in Simulink to write custom UDP receive code using MATLAB's built-in UDP functions. This approach involves using udpport (introduced in R2020b) to create a UDP object and read data.

Here is a sample code demostrating its basic usage, which you may use to build-up on further:

function data = udpReceiveFunction()
    persistent udpObj
    if isempty(udpObj)
        udpObj = udpport("LocalPort", 12345); % Specify your port number
    end
    data = read(udpObj, 512, "uint8"); % Adjust buffer size and data type as needed
end

More information about 'udpport' can be found here: https://www.mathworks.com/help/instrument/udpport.html

As for your second question, to control a servo motor with Arduino from Simulink, you typically run Simulink in External Mode, which allows real-time interaction with the hardware. For this, you will need to have the Arduino Support Package installed. This package provides the necessary blocks to interface with Arduino hardware. You can then use the Arduino Servo Write block from the Arduino Support Package to send the control signal to the servo motor.

I hope this helps in resolving your query.