change this arduino code into matlab code:

 int pd=2;                 
 int buzz=13;               
 int senRead=0;             
 int limit=1000;                
 void setup()    
 {  
  pinMode(pd,OUTPUT);  
  pinMode(buzz,OUTPUT);  
  digitalWrite(pd,HIGH);   
  digitalWrite(buzz,LOW);    
  Serial.begin(9600);          
 }  
 void loop()  
 {  
  int val=analogRead(senRead); 
  Serial.println(val);         
  if(val <= limit)             
  {  
   digitalWrite(buzz,HIGH);   
 }  
  else if(val > limit)         
  {  
   digitalWrite(buzz,LOW);    
   delay(20);  
  }  
 }

[Walter Roberson]

The "if" after the else is redundant. With the int data type, every val that is not <= limit must be > limit.

If you were using floating point data types instead, then there is one case where both conditions can be false, and that is if val is NaN (Not A Number).

Answer 1

[Madhu Govindarajan]

I have not tried this out, hope this works out. I am using R2015a syntaxes for which you will have to download the support package. If it does not, please post any error messages that you get.

pd = 'D2';

buzz = 'D13';

senRead = 'A0';

limit = 1000;

a = arduino;

configurePin(a, pd, 'DigitalOutput')
configurePin(a, buzz, 'DigitalOutput')

writeDigitalPin(a, pd, 1);
writeDigitalPin(a, buzz, 0);

for i = 1:1000
  val = readVoltage(a,senRead)
  if val <= limit
    writeDigitalPin(a, buzz, 1);
  elseif val > limit
    writeDigitalPin(a, buzz, 0);
    pause(0.002);
  end

end