I receive the following error:
>> a = arduino('/dev/cu.usbmodem11201','uno','libraries','ExampleLCD/LCDAddon');
Cannot program board Uno (/dev/cu.usbmodem11201). Please make sure the board is supported and
the port and board type are correct. For more information, see Arduino Hardware Troubleshooting.
I am using MacbookPro 2021 and I created LCD library as per the instructions on MATLAB Help Centre
.But I don't receive an error if I execute:
>> a = arduino('/dev/cu.usbmodem11201','uno');
Related
I am using an Arduino MEGA with MATLAB for the first time to try and control a servo motor, the issue is that the default PWM frequency for the pin I am trying to use is at 976Hz, while I need it to be around 50Hz. I found code for changing the timer 0 B register that affects this frequency but only for use in the Arudino IDE.
So basically, I need to send the following command to the Arduino:
TCCR0B = TCCR0B & B11111000 | B00000101;
Does anyone know how to do this while using the Arduino MEGA through MATLAB? Is there not a way to have straight up Arudino code in the .m file through some function/syntax? Or is there another way to manipulate the TCCR0B register via MATLAB? I know I could do this on the Arduino IDE but I really need to use MATLAB for the rest of this project.
Thank you for your time.
I am sending accelerometer data via bluetooth into Matlab where I will process it and build a GUI.
I am currently working on getting the bluetooth data into Matlab. I'm using a dongle which gets data into port COM18. This is the code I'm using:
s= serial ('COM18');
set(s,'DataBits',8);
set(s,'StopBits',1);
set(s,'BaudRate',9600);
set(s,'Parity','none');
fopen(s);
When I start from scratch (disconnect and connect bluetooth and dongle, reopen matlab etc) The port successfully opens and allows me to read data. However, if I close and then try to open, it will give me an error:
Error using serial/fopen (Line 72)
Open failed: Port COM 18 is not available. Available ports: COM6, COM7, COM19.
use INSTRFIND to determine if other instrument objects are connected
to the requested device.
I know that my device isn't connected to anything else. So I then have to disconnect my bluetooth, dongle, and restart matlab.
Is there a more efficient way to do this?
Also, I am able to get values from my accelerometer into Matlab, but I don't know how to make them continuous. Each time 512 bytes are sent and if my ValuesReceived exceeds 12000, I once again have to restart my bluetooth device to get more values. I've tried flushoutput, but it hasn't worked. Any ideas on how to get continuous data into Matlab so I can process it in my GUI?
I figured out the problem. In order to not get this error anymore I simply had to follow the sequence
fclose(s);
delete(s);
clear s;
and then when I do
s= serial ('COM18');
set(s,'DataBits',8);
set(s,'StopBits',1);
set(s,'BaudRate',9600);
set(s,'Parity','none');
fopen(s);
I am no longer getting the error. It was just the order of operation to close the serial.
MATLAB released a Support Package for Arduino® Hardware this September and I am using it with MATLAB r2014a. I am having problems concerning the speed of the communication between MATLAB and Arduino. Does anyone know how can I increase the baud rate? I tried changing it in the arduino.m file but I get the following error :
Updating server code on Arduino Uno (COM3). Please wait.
Error using arduino_real_time_plotter (line 1)
Internal error: The initialization of the server code is
incorrect.
According to Mathworks this is no longer possible in the new MATLAB Support Package for Arduino® Hardware!
I have successfully connected MATLAB with my Arduino. So far, I have only sent simple tasks to the Arduino such as digitalWrite and such.
The code I have been using is as follows:
%-- connect to the board
a = arduino('COM9')
%-- specify pin mode
a.pinMode(9,'output');
%-- write 0 (off) to pin 9
a.digitalWrite(9,0);
%-- dummy variable
on = false;
%-- simple loop to make LED flash 5 times
for m in 1:5
if on
a.digitalWrite(9,0); % turn LED off
on = false;
else
a.digitalWrite(9,1); % turn LED on
on = true;
end
%-- close session
delete(a)
Now that this basic test successfully passed, I wanted to get the SPI Arduino library to work with MATLAB. Is it possible to call a function from the Arduino SPI library in my MATLAB code? Specifically, I want to get SPI.begin(); and SPI.end(); to work from MATLAB, but a.SPI.begin() is not working. Is there some step I am missing?
To get the SPI library into an Arduino program, one must use #include <SPI.h>, but how can we make sure MATLAB knows all of the functions available in the SPI library? Hopefully it is not a problem that the Arduino SPI Library code is written in a different language than what MATLAB files are written in.
References:
MATLAB Support Package for Arduino (aka ArduinoIO Package)
Arduino SPI Library
The library "ArduinoIO" does not support SPI.
That library is just a serial port listener, and every matlab/arduino instruction send a code by serial, that is readed in the sketch on the arduino, translated in the corresponding arduino's instruction, and then executed.
You can create your own block that send some your-choise-spi-command, you'll also have to edit the arduino's sketch to execure the corrisponding SPI command. But you'll have to understand how the library works, change it's code, and so on.
It is way more faster (in execution speed, as serial comunication really is slow, and coding time) to code a "specialized" arduino sketch, that send back to Serial just the value you need, and then read serial and to pc-side computation.
To communicate with SPI device using Matlab support package you can use the following code:
a = arduino();
Spi_Device = spidev(a, 'D5'); % D5 is the pin number that you want to use for chip select
writeRead(Spi_Device,[hex2dec('00'), 100]); % 100 is the value that you want to send to the device
% When you done clear the spi object
clear Spi_Device
The Legacy MATLAB and Simulink Support for Arduino is no longer supported. I would recommend using the MATLAB Support Package for Arduino Hardware as that has built-in support for basic SPI communication.
There are getting started type of examples that comes with the support package and one of them shows how to use SPI.
Disclaimer: Even though I work for MathWorks, these posts are based on my experience with the software as a user. For actual Technical Support, please contact Mathworks' TS.
I am facing some problems while trying to send data from Matlab To DSPIC30f4011 through USB to UART Converter. Here is my code:
function comparison()
global x1 y1
s=serial('COM3');
set(s,'BaudRate',9600);
fopen(s);
fprintf(s,'2');
out=fscanf(s);
fclose(s);
But my circuit board is unable to receive the data. How can I solve this problem?
Receive:
I always had problems receiving data from a serial port, so I used a mex file GetSerialData.cpp, but right now I can't figure were came from.
Send:
To send data correctly it is really important that you got the right baud rate and COM-port. You could check the com-port in your windows device manager. Mine shows up in the (COM & LPT) group as USB Serial Port (COM7).
The baud rate depends on your DSPIC30F4011 device, which you probably also have to configure.