Converting from Arduino (C++) to MATLAB has some challenges as describere here but it can be done. There are some converters online that will get you started but you will need an understanding of both langauges to ensure the code is "apples to apples".
The question is what are you trying to achieve? If you are acquiring raw values and processing them on the Arduino you could pass those raw values directly to MATLAB and process them there. The example below shows you how:
MATLAB
% Connect to serial port and set properties
s = serial('/dev/cu.usbmodem14101', 'BaudRate', 9600);
s.InputBufferSize = 20;
s.Timeout = 4;
fopen(s);
% Pause to begin a flow of data
pause(3);
fprintf("Connection established\n")
% Start a counter and timer
count = 0;
tic
startTimer = toc;
% Get data for 15 seconds
while (toc < startTimer+15)
% Perform the header checks and get cast bytes to ints
if (fread(s, 1) == 159)
if (fread(s, 1) == 110)
x = fread(s, 2);
analogOut = typecast(uint8(x), 'uint16');
end
end
% Display data to the user
fprintf("%d\n", analogOut)
% Increment counter
count = count + 1;
end
% Display sample rate to user
endTimer = toc;
fprintf("Sample rate was: %0.2f Hz\n", count/(endTimer - startTimer))
% Remove serial port connection
fclose(s);
delete(s)
clear s
Arduino
int analogValue;
void setup() {
// Setup serial port
Serial.begin(9600);
}
void loop() {
// Read the analog pin
analogValue = analogRead(A0);
// Write bytes via serial
writeBytes(&analogValue);
}
void writeBytes(int* data1){
// Cast to a byte pointer
byte* byteData1 = (byte*)(data1);
// Byte array with header for transmission
byte buf[4] = {0x9F, 0x6E, byteData1[0], byteData1[1]};
// Write the byte
Serial.write(buf, 4);
}
