No appropriate method, property, or field 'pinMode' for class 'arduino'.

Question

Fredy Aldo Tsangue Jiatsa 2016-9-26

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/304583-no-appropriate-method-property-or-field-pinmode-for-class-arduino

评论： Walter Roberson 2017-7-20

Hello,

I make a project with arduino and matlab. I have connected everything, now I try to write arduino code in matlab. if I print on run, this following announcement always comes out:

No appropriate method, property, or field 'pinMode' for class 'arduino'.

can somebody help please me?

thanks

thus matlab code looks:

a = arduino('COM12', 'uno');
clkPin=2;
dtPin=3;
swPin=4;
a.pinMode(2,'input')
a.pinMode(3,'input');
a.pinMode(4,'input');
a.digitalWrite(4,1);
oldA = 1;
oldB = 1;
result = 0;
encoderVal = 0;
newA = a.digitalRead(clkPin);
newB = a.digitalRead(dtPin);
if (newA ~= oldA) | (newB ~= oldB) 
      if (oldA == 1 & newA == 0)
        result = (oldB * 2 - 1);
      end
  end
oldA = newA;
oldB = newB;
change = result;
encoderVal = encoderVal + change;
if digitalRead(swPin) == 0
    encoderVal = 0;
end
Serial.println(encoderVal);

i use matlab R2016a

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homam mohamad alramadan 2017-7-20

编辑：Walter Roberson 2017-7-20

在 MATLAB Online 中打开

i have the same problem i am trying to communicate arduino ith matlab gui and the error appears in the last line

delete(instrfind({'Port'},{'COM5'}))
clear a;
global a;
a=arduino('COM5');
a.pinMode(8,'output');

Walter Roberson 2017-7-20

homam mohamad alramadan: which MATLAB release are you using?

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Answer 1

Walter Roberson 2016-9-26

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/304583-no-appropriate-method-property-or-field-pinmode-for-class-arduino#answer_236196

pinmode is the older "legacy" interface. It has been replaced. See https://www.mathworks.com/help/supportpkg/arduinoio/ref/configurepin.html and readDigitalPin and readVoltage and writeDigitalPin

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Fredy Aldo Tsangue Jiatsa 2016-10-6

编辑：Walter Roberson 2016-10-6

在 MATLAB Online 中打开

Hello Walter Roberson,

this is the complete arduino code:

const int clkPin= 2;
const int dtPin= 3;
const int swPin= 4 ;
int encoderVal = 0;
void setup()
{
  pinMode(clkPin, INPUT);
  pinMode(dtPin, INPUT);
  pinMode(swPin, INPUT);
  digitalWrite(swPin, HIGH);
  Serial.begin(9600);
}
void loop()
{
    int change = getEncoderTurn();
    encoderVal = encoderVal + change;
    if(digitalRead(swPin) == LOW)
    {
      encoderVal = 0;
    }
      Serial.println(encoderVal);
  }
int getEncoderTurn(void)
{
  static int oldA = HIGH;
  static int oldB = HIGH;
  int result = 0;
  int newA = digitalRead(clkPin);
  int newB = digitalRead(dtPin);
  if (newA != oldA || newB != oldB)
  {
    if (oldA == HIGH && newA == LOW)
    {
      result = (oldB * 2 - 1);
    }
  }
    oldA = newA;
    oldB = newB;
    return result;
  }

This arduino code is for encoder. if I turn encoder, it counts pay high and if I turn in other direction, it counts pay under it. now I would like to circumscribe this arduino code in Matlab code and this is what I have written:

clear all; close all; clc
a = arduino('COM12', 'uno');
configurePin(a,'D2','DigitalInput');
configurePin(a,'D3','DigitalInput');
configurePin(a,'D4','Unset');
writeDigitalPin(a,'D4',1);
encoderVal = 0;
while 1
      oldA = 1;
      oldB = 1;
      result = 0;
      newA = readDigitalPin(a,'D2');
      newB = readDigitalPin(a,'D3');
      if (newA ~= oldA) || (newB ~= oldB) 
          if (oldA == 1 && newA == 0)
             result = (oldB * 2 - 1);
          end
      end
      oldA = newA;
      oldB = newB;
      change = result;
      encoderVal = encoderVal + change
end

but it does not work and I do not know what I make wrong or how I should continue. Please, can you help me?

I thank you for her understanding.

Thanks

Walter Roberson 2016-10-25

在 MATLAB Online 中打开

Try

delete(instrfind())

to get rid of any lingering connections.

Fredy Aldo Tsangue Jiatsa 2016-10-27

编辑：Walter Roberson 2016-10-27

在 MATLAB Online 中打开

Hello Walter Roberson,

when I run the programme by putting delete (instrfind ()) at this level:

clear all; close all; clc
a = arduino('COM12', 'uno');
delete(instrfind())
configurePin(a,'D2','DigitalInput');
configurePin(a,'D3','DigitalInput');
configurePin(a,'D4','Unset');
writeDigitalPin(a,'D4',1);
encoderVal = 0;
oldA = 1;
oldB = 1;
while 1
        result = 0;
        newA = readDigitalPin(a,'D2');
        newB = readDigitalPin(a,'D3');
        if (newA ~= oldA) || (newB ~= oldB) 
            if (oldA == 1 && newA == 0)
               result = (oldB * 2 - 1);
            end
        end
        oldA = newA;
        oldB = newB;
        change = result;
        encoderVal = encoderVal + change
  end
I get the text suivant:
Error using to Encode (line 4) 
Instrument object OBJ simple percentage year invalid object.

but when I put delete (instrfind ()) at the end of the programme:

clear all; close all; clc
a = arduino('COM12', 'uno');
configurePin(a,'D2','DigitalInput');
configurePin(a,'D3','DigitalInput');
configurePin(a,'D4','Unset');
writeDigitalPin(a,'D4',1);
encoderVal = 0;
oldA = 1;
oldB = 1;
while 1
        result = 0;
        newA = readDigitalPin(a,'D2');
        newB = readDigitalPin(a,'D3');
        if (newA ~= oldA) || (newB ~= oldB) 
            if (oldA == 1 && newA == 0)
               result = (oldB * 2 - 1);
            end
        end
        oldA = newA;
        oldB = newB;
        change = result;
        encoderVal = encoderVal + change
  end
  delete(instrfind())

I still do not get numbers negative. I always get numbers positive, all the same which direction of encoder I turn .

where exactly in the programme I must delete(instrfind()) write?

good day to you and thank you.

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No appropriate method, property, or field 'pinMode' for class 'arduino'.

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No appropriate method, property, or field 'pinMode' for class 'arduino'.

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