Integration of the Arduino Library Adafruit MAX31865 in Matlab

I would like to integrate the library for the MAX31865 sensor in Matlab to measure my temperature like in Arduino IDE. For this I need a corresponding header file and a corresponding Matlab class.

Here is the code I have programmed for the header file and the Matlab class. When I try to initialise the Arduino, I get the message that the board cannot be programmed. Where is my error?

a = arduino('COM6', 'Mega2560', 'Libraries', 'Adafruit/MAX31865');

Unable to create a communication link with the serial port. Please check the input argument PORT and verify that a device

is connected.

Header File

**

* @file MAX31865Base.h

*

* Class definition for MAX31865Base class that wraps APIs of Adafruit MAX31865 library

*

* @copyright Copyright 2023

*

*/

#include "LibraryBase.h"

#include "Adafruit_MAX31865.h"

#include "BusIO_Register"

#define MAX_SENSORS 4

Adafruit_MAX31865 *max31865Sensors[MAX_SENSORS];

// Arduino trace commands

const char MSG_MAX31865_CREATE_SENSOR[] PROGMEM = "Adafruit::max31865Sensors[%d] = new Adafruit_MAX31865(%d, %d, %d, %d);\n";

const char MSG_MAX31865_DELETE_SENSOR[] PROGMEM = "Adafruit::delete max31865Sensors[%d];\n";

const char MSG_MAX31865_READ_TEMPERATURE[] PROGMEM = "Adafruit::max31865Sensors[%d]->temperature(%f, %f);\n";

#define CREATE_SENSOR 0x00

#define DELETE_SENSOR 0x01

#define READ_TEMPERATURE 0x02

class AdafruitMAX31865Trace {

public:

static void createSensor(byte sensorNum, int8_t cs, int8_t mosi, int8_t miso, int8_t clk) {

if(sensorNum < MAX_SENSORS){

if (NULL != max31865Sensors[sensorNum]) {

delete(max31865Sensors[sensorNum]);

max31865Sensors[sensorNum] = NULL;

}

max31865Sensors[sensorNum] = new Adafruit_MAX31865(cs, mosi, miso, clk);

max31865Sensors[sensorNum]->begin();

debugPrint(MSG_MAX31865_CREATE_SENSOR, sensorNum, cs, mosi, miso, clk);

}

}

static void deleteSensor(byte sensorNum) {

if(sensorNum < MAX_SENSORS){

delete max31865Sensors[sensorNum];

max31865Sensors[sensorNum] = NULL;

debugPrint(MSG_MAX31865_DELETE_SENSOR, sensorNum);

}

}

static float readTemperature(byte sensorNum, float RTDnominal, float refResistor) {

if(sensorNum < MAX_SENSORS && max31865Sensors[sensorNum] != NULL){

float temp = max31865Sensors[sensorNum]->temperature(RTDnominal, refResistor);

debugPrint(MSG_MAX31865_READ_TEMPERATURE, sensorNum, RTDnominal, refResistor);

return temp;

}

return NAN;

}

};

class MAX31865Base : public LibraryBase

{

public:

MAX31865Base(MWArduinoClass& a)

{

libName = "Adafruit/MAX31865";

a.registerLibrary(this);

}

void setup(){

for (int i = 0; i < MAX_SENSORS; ++i) {

max31865Sensors[i] = NULL;

}

}

// Implementation of LibraryBase

//

public:

void commandHandler(byte cmdID, byte* dataIn, unsigned int payloadSize)

{

switch (cmdID){

case CREATE_SENSOR:{

byte sensorNum = dataIn[0];

int8_t cs = dataIn[1];

int8_t mosi = dataIn[2];

int8_t miso = dataIn[3];

int8_t clk = dataIn[4];

AdafruitMAX31865Trace::createSensor(sensorNum, cs, mosi, miso, clk);

sendResponseMsg(cmdID, 0, 0);

break;

}

case DELETE_SENSOR:{

byte sensorNum = dataIn[0];

AdafruitMAX31865Trace::deleteSensor(sensorNum);

sendResponseMsg(cmdID, 0, 0);

break;

}

case READ_TEMPERATURE:{

byte sensorNum = dataIn[0];

float RTDnominal = *(float*)(dataIn + 1);

float refResistor = *(float*)(dataIn + 5);

float temperature = AdafruitMAX31865Trace::readTemperature(sensorNum, RTDnominal, refResistor);

sendResponseMsg(cmdID, (byte*)&temperature, sizeof(temperature));

break;

}

default:

break;

}

}

};

Matlab Class

classdef MAX31865 < matlabshared.addon.LibraryBase & matlab.mixin.CustomDisplay

properties(Access = private, Constant = true)

CREATE_SENSOR = hex2dec('00');

DELETE_SENSOR = hex2dec('01');

READ_TEMPERATURE = hex2dec('02');

end

properties(Access = protected, Constant = true)

LibraryName = 'Adafruit/MAX31865'

DependentLibraries = {'Servo', 'I2C'}

LibraryHeaderFiles = {'Adafruit_MAX31865/Adafruit_MAX31865'};

CppHeaderFile = fullfile(arduinoio.FilePath(mfilename('fullpath')), 'src', 'MAX31865Base.h')

CppClassName = 'MAX31865Base'

end

properties(Access = public)

SensorNum

end

methods(Access = public)

function obj = MAX31865(parentObj, sensorNum, cs, mosi, miso, clk)

obj.Parent = parentObj;

obj.SensorNum = sensorNum;

% Create the sensor

cmdID = obj.CREATE_SENSOR;

inputs = [sensorNum, cs, mosi, miso, clk];

sendCommand(obj, cmdID, inputs);

end

function temperature = readTemperature(obj, RTDnominal, refResistor)

% Read the temperature from the sensor

cmdID = obj.READ_TEMPERATURE;

inputs = [obj.SensorNum, typecast(single(RTDnominal), 'uint8'), typecast(single(refResistor), 'uint8')];

output = sendCommand(obj, cmdID, inputs);

temperature = typecast(output, 'single');

end

end

end