MATLAB communication with Arduino Uno (with servos)
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Hello guys, I'm trying to connect 2 servos to Arduino so to move them by digiting the degrees in MATLAB. I hope you guys can help me.
Here´s the code for MATLAB:
clear all
clc
dato=[1 0];
arduino=serial('COM3','BaudRate',9600);
fopen(arduino);
while dato
fprintf(arduino,'%s',char(dato));
dato=input('Dame coordenadas: ');
end
fclose(arduino);
Here´s the code for Arduino.
#include <Servo.h>
Servo myservo;
int pos = 0;
int a;
void setup() {
Serial.begin(9600);
myservo.attach(9);
}
char cadena[24];
byte contador=0;
int valor = 0;
void loop(){
for(a; a<1; a++){
Serial.print("Introduzca posicion de servo :");
}
if(Serial.available()){
memset(cadena, 0, sizeof(cadena));
while (Serial.available()>0){
delay(5);
cadena[contador]=Serial.read();
contador++;
}
valor=atoi(cadena);
valor = min(valor, 180); //establece valor maximo
valor = max(valor, 0); //establece valor minimo
Serial.print(valor); //imprime en pantalla el valor introducido
Serial.println(" grados");
myservo.write(valor); //establece el valor como posicion myservo
a=0; //reiniciamos a para volver a mostrar aviso para introduccion de datos
contador=0;
delay(100);
}
}
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Answers (1)
Walter Roberson
on 8 Aug 2012
You have
dato=[1 0];
and then you have
while dato
When you apply "if" or "while" to a vector or array, the test is only considered to be true if all the elements are non-zero. Your second element of dato is 0, so the "while" fails the first time around, and the fprintf() is never executed.
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