can somebody help me to translate this Arduino code to Matlab?

// DECLARACION DE VARIABLES PARA PINES
const int pinecho = 4;
const int pintrigger = 5;
const int pinled = 13;

// Motor A

int IN1 = 8;
int IN2 = 9;

// Motor B

int IN3 = 6;
int IN4 = 7;

int TIempo=0;

// VARIABLES PARA CALCULOS
unsigned int tiempo, distancia;

void setup() {
  // PREPARAR LA COMUNICACION SERIAL
  Serial.begin(9600);
  // CONFIGURAR PINES DE ENTRADA Y SALIDA
  pinMode(pinecho, INPUT); % DUDA
  pinMode(pintrigger, OUTPUT);
  pinMode(13, OUTPUT);

    // inicializar la comunicación serial a 9600 bits por segundo:
    Serial.begin(9600);
    // Declaramos todos los pines como salidas
    pinMode (IN1, OUTPUT);
    pinMode (IN2, OUTPUT);
    pinMode (IN3, OUTPUT);
    pinMode (IN4, OUTPUT);
  }
  void loop() {
    // ENVIAR PULSO DE DISPARO EN EL PIN "TRIGGER"
    digitalWrite(pintrigger, LOW);
    delayMicroseconds(2);
    digitalWrite(pintrigger, HIGH);
    // EL PULSO DURA AL MENOS 10 uS EN ESTADO ALTO
    delayMicroseconds(2);
    digitalWrite(pintrigger, LOW);

    // MEDIR EL TIEMPO EN ESTADO ALTO DEL PIN "ECHO" EL PULSO ES PROPORCIONAL A LA DISTANCIA MEDIDA
    tiempo = pulseIn(pinecho, HIGH);

    // LA VELOCIDAD DEL SONIDO ES DE 340 M/S O 29 MICROSEGUNDOS POR CENTIMETRO
    // DIVIDIMOS EL TIEMPO DEL PULSO ENTRE 58, TIEMPO QUE TARDA RECORRER IDA Y VUELTA UN CENTIMETRO LA ONDA SONORA
    distancia = tiempo / 58;

    // ENVIAR EL RESULTADO AL MONITOR SERIAL
    Serial.print(distancia);
    Serial.println(" cm");
    delay(150);

    // ENCENDER EL LED CUANDO SE CUMPLA CON CIERTA DISTANCIA
    if (distancia <= 20) {
      digitalWrite(13, HIGH);
      delay(300);
    } else {
      digitalWrite(13, LOW);

    //apagar el carro 
      void frenado ();
  if (distancia <=20) {
    digitalWrite(13, HIGH);
     //Direccion motor A
    digitalWrite (IN1, LOW);
    digitalWrite (IN2, LOW);
    //Direccion motor B
    digitalWrite (IN3, LOW);
    digitalWrite (IN4, LOW);
  }

    }

     if (Serial.available()) {
       char dato= Serial.read();
       if(dato=='a')
       {
          Adelante();
          TIempo=0;
       }
       else if(dato=='r')
       { 
          Reversa();
          TIempo=0;
       }
       else if(dato=='d')
       { 
          Derecha();
          TIempo=0;
       }
       else if(dato=='i')
       { 
          Izquierda();
          TIempo=0;
       }   

     }
    if(TIempo<1) // 100 cilcos de 1ms 
    {    
      TIempo=TIempo+1;
    }
    else   //ya transcurrió 100ms (100ciclos)
    {
      Parar();
    }
    delay(1); //pasusa de 1ms por ciclo
  }

void Adelante ()
{
  //Direccion motor A
  digitalWrite (IN1, LOW);
  digitalWrite (IN2, HIGH);
  //Direccion motor B
  digitalWrite (IN3, LOW);
  digitalWrite (IN4, HIGH);
}
void Parar ()
{
  //Direccion motor A
  digitalWrite (IN1, LOW);
  digitalWrite (IN2, LOW);
  //Direccion motor B
  digitalWrite (IN3, LOW);
  digitalWrite (IN4, LOW);
}

void Derecha ()
{
  //Direccion motor A
  digitalWrite (IN1, HIGH);
  digitalWrite (IN2, LOW);

    //Direccion motor B
    digitalWrite (IN3, LOW);
    digitalWrite (IN4, HIGH);

}
void Izquierda ()
{
  //Direccion motor A
  digitalWrite (IN1, LOW);
  digitalWrite (IN2, HIGH);
  //Direccion motor B
  digitalWrite (IN3, HIGH);
  digitalWrite (IN4, LOW);
}
void Reversa ()
{
  //Direccion motor A
  digitalWrite (IN1, HIGH);
  digitalWrite (IN2, LOW);

    //Direccion motor B
    digitalWrite (IN3, HIGH);
    digitalWrite (IN4, LOW);
  }

Answer 1

[Pratik]

Hi Guillermo,

From what I can understand, the arduino code provided needs to be changed to MATLAB equivalent code.

The provided Arduino code involves digital I/O, serial communication, and timing functions to control motors and read from an ultrasonic sensor. Here's a MATLAB version that attempts to replicate the functionality, assuming the necessary support package is installed.

Please refer to the following code:

% MATLAB Code Equivalent

% Setup MATLAB and Arduino connection
a = arduino('COM3', 'Uno', 'Libraries', 'Ultrasonic'); % Change 'COM3' to your Arduino's port

% Define pin numbers
pinecho = 'D4';
pintrigger = 'D5';
pinled = 'D13';

% Motor A
IN1 = 'D8';
IN2 = 'D9';

% Motor B
IN3 = 'D6';
IN4 = 'D7';

% Initialize Ultrasonic sensor
ultrasonicSensor = ultrasonic(a, pintrigger, pinecho);

% Main loop
while true
    % Send pulse
    distancia = readDistance(ultrasonicSensor) * 100; % Convert meters to cm
    
    % Display distance
    fprintf('%f cm\n', distancia);
    pause(0.15); % Delay
    
    % Check distance to turn on LED
    if distancia <= 20
        writeDigitalPin(a, pinled, 1);
        pause(0.3);
    else
        writeDigitalPin(a, pinled, 0);
    end
    
    % Read from serial (this part is tricky in MATLAB, assuming pseudo code for user input)
    % MATLAB does not directly support reading from the serial monitor like the Arduino IDE does.
    % You would need an external interface or a custom script to handle user inputs.
    % For demonstration, let's assume a function getUserInput() that returns a character
    
    dato = getUserInput(); % This is a placeholder for user input functionality
    
    if dato == 'a'
        Adelante(a, IN1, IN2, IN3, IN4);
    elseif dato == 'r'
        Reversa(a, IN1, IN2, IN3, IN4);
    elseif dato == 'd'
        Derecha(a, IN1, IN2, IN3, IN4);
    elseif dato == 'i'
        Izquierda(a, IN1, IN2, IN3, IN4);
    end
    
    pause(0.001); % Small delay
end

% Motor control functions
function Adelante(a, IN1, IN2, IN3, IN4)
    writeDigitalPin(a, IN1, 0);
    writeDigitalPin(a, IN2, 1);
    writeDigitalPin(a, IN3, 0);
    writeDigitalPin(a, IN4, 1);
end

function Parar(a, IN1, IN2, IN3, IN4)
    writeDigitalPin(a, IN1, 0);
    writeDigitalPin(a, IN2, 0);
    writeDigitalPin(a, IN3, 0);
    writeDigitalPin(a, IN4, 0);
end

function Derecha(a, IN1, IN2, IN3, IN4)
    writeDigitalPin(a, IN1, 1);
    writeDigitalPin(a, IN2, 0);
    writeDigitalPin(a, IN3, 0);
    writeDigitalPin(a, IN4, 1);
end

function Izquierda(a, IN1, IN2, IN3, IN4)
    writeDigitalPin(a, IN1, 0);
    writeDigitalPin(a, IN2, 1);
    writeDigitalPin(a, IN3, 1);
    writeDigitalPin(a, IN4, 0);
end

function Reversa(a, IN1, IN2, IN3, IN4)
    writeDigitalPin(a, IN1, 1);
    writeDigitalPin(a, IN2, 0);
    writeDigitalPin(a, IN3, 1);
    writeDigitalPin(a, IN4, 0);
end

% Placeholder for a function that simulates receiving user input
function input = getUserInput()
    % Implement a way to get user input here
    % This could be through a GUI, a file, or any other method
    input = ''; % Return a character or string based on the input method
end

I hope this helps!