How to monitor an analog signal real-time in Simulink?
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I am using Simulink (Embedded Coder) to program my LAUNCHXL-F28379D TI C2000 microcontroller.
I have created a model to detect the frequency of a signal and I want to use this model to detect the frequency of the encoder signal (in order to estimate the angular velocity of the motor). The model seems to be successfully identifying frequencies of different signals in the simulation environment.
Now, I want to test this model with the actual encoder signal. I have digital output GPIO pins (that can only output 0V and 3.3V.) Is there a way to monitor this signal real-time?
Note: I am using MATLAB 2017b and I have an oscilloscope.
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Antworten (2)
Mark McBroom
am 24 Mär. 2018
The F28379D device has input capture pins that can be used to measure the frequency of an input signal.
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Mark McBroom
am 1 Apr. 2018
You are limited by the speed of the communication channel. What is the frequency of the signal you are measuring? Why are you using an analog channel? If you only need to measure frequency, you should use an input capture pin. This is a better use of CPU resources than trying to sample a high frequency signal using an A/D.
4 Kommentare
Rahul Subrahmanian
am 28 Mär. 2022
Bearbeitet: Rahul Subrahmanian
am 28 Mär. 2022
Hi Mark,
I am not using input capture pin. I need to read a 25kHz sine wave and generate SPWM with respect to that sine wave.
I have created a thread for the issue I am facing.
No one has replied to it yet.
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