MATLAB takes few seconds for processing the code and start the serial communication, wait until MATLAB shows âBUSYâ message at the bottom left corner of the software screen, as shown in below image.
Send data to Serial Port in MATLAB
tep=serial(âCOM1â, âBaudRateâ, 9600);
fopen(tep); fprintf(tep,âaâ); fclose(tep);
clc
clear all close all disp(â Welcome to TEP!!!â); disp(â â); disp(â www.TheEngineeringProjects.comâ); disp(â â); tep=serial(âCOM1â); % assign serial port object set(tep, âBaudRateâ, 9600); % set BaudRate to 9600 set(tep, âParityâ, ânoneâ); % set Parity Bit to None set(tep, âDataBitsâ, 8); % set DataBits to 8 set(tep, âStopBitâ, 1); % set StopBit to 1 %display the properties of serial port object in MATLAB Window disp(get(tep,{âTypeâ,âNameâ,âPortâ,âBaudRateâ,âParityâ,âDataBitsâ,âStopBitsâ})); fopen(tep); % Open Serial Port Object fprintf(tep,âaâ); %Print character âaâ to the serial port disp(âCharater sent to Serial Port is âaâ.â); fclose(tep); %Close Serial Port Object
clc
clear all close all disp(â Welcome to TEP!!!â); disp(â â); disp(â www.TheEngineeringProjects.comâ); disp(â â); tep=serial(âCOM1â); % assign serial port object set(tep, âBaudRateâ, 9600); % set BaudRate to 9600 set(tep, âParityâ, ânoneâ); % set Parity Bit to None set(tep, âDataBitsâ, 8); % set DataBits to 8 set(tep, âStopBitâ, 1); % set StopBit to 1 %display the properties of serial port object in MATLAB Window disp(get(tep,{âTypeâ,âNameâ,âPortâ,âBaudRateâ,âParityâ,âDataBitsâ,âStopBitsâ})); fopen(tep); % Open Serial Port Object data = input(âEnter character: â, âsâ); %Ask user to Enter character fprintf(tep,data); %Print character âaâ to the serial port disp(âCharater sent to Serial Port is:â); disp(data); fclose(tep); %Close Serial Port Object Data becker complete home designer 8.
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Update 2: Turns out adding a
pause(2) after opening the serial port was all it needed.
Update: I am able to manually enter the Matlab code into the Matlab command window and it will update the LEDs as expected, but I cannot call my function that does so. I will try adding time delays, perhaps the Arduino buffer cannot keep up.
Serial Port Communication Matlab Code For Finite Numbers
I am using an Arduino Uno with the Sparkfun PWM shield to control 3 LEDs. I have written an Arduino sketch that looks for serial input to set the LED values, and Matlab code that prepares and sends the serial output. See all the code below.
For some reason this code, which was working several months ago, has stopped working. I am using 2011b version of Matlab now, and was using 2013a before. Nothing else has changed.
I believe the issue is with the serial communication, as I can get it to work by having Matlab and Arduino IDE running at the same time, opening the serial monitor in Arduino IDE, then issuing the Matlab command. It sets the LED values as desired. In order to send another command I need to first close, and re-open the Arduino serial monitor.
Matlab code:
Matlab Code For Finite Difference Method
Arduino code:
dsolimano
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AlexAlex
2 Answers
In order to engage the Arduino over the serial port through Matlab it seems to need a time delay of ~2 seconds. Adding a delay before starting to send data over the serial line did the trick.
Matlab Code Examples
AlexAlex
I solved that problem by setting my own serial terminator (I used
! as terminator). And when I send a serial command, I use ! as terminator.
then in my code:
I think that the problem is that matlab is waiting for a terminator. Than if there's not fullfilling, timeout is executed and set to 2sec. That's why execution is possible after a delay bigger than timeout.
Tristan
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Matlab Code For Newton's Method
GabrielGabriel
Basic Matlab Code ExamplesNot the answer you're looking for? Browse other questions tagged matlabserial-portarduinoarduino-ide or ask your own question.Comments are closed.
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