Help needing disabling button input

samg1988

Help needing disabling button input

in Integration and Hardware • 2 years ago

I have a set up running three buttons at the moment. I'm having trouble with my program crashing when somebody presses all three buttons in quick succession.

To stop this from happening, when one button is pressed, I want to disable input from all the buttons for 1 second.
I'd rather not use a delay, so ideally it would be using millis.

I'm really struggling on figuring out a couple of lines of code to do this though, millis really confuses me and I'm not sure how you disable a button in processing.

Can anyone help?

Replies(7)

nardove

Re: Help needing disabling button input

2 years ago

Hi,

It is a bit difficult to help without seeing your program, have you consider using a boolean flag to check the status of the buttons?

For example on button click check if the flag is set to true, if so the button is active and do nothing, if false the button is inactive therefore set flag to true and do something, do the same for all buttons.

Set a timer that reset all button flags to false so the user can click them again.

After a second read, you can use a global flag, and check if the flag is true on button click, if so do nothing else set flag to true and do something, start a timer that will reset the flag to false after a period of time. or you can reset the flag after a process from a button has finish.

There are many ways to solve the problem.

Check this post were they discuss how to make something happen on a time interval

Hope that helps

- rS

samg1988

Re: Help needing disabling button input

2 years ago

Ok thanks! - Here is a simplified version of the code I'm using, 3 buttons red amber and green. When a button is pressed the LED pins change and it writes a number 1, 2, or 3 to a text file depending on which button is pressed.

// check if the pushbutton is pressed.
// if it is, the buttonState is HIGH:
   if (greenbuttonState == arduino.HIGH) {

red = false;
amber = false;
green = true;

}
   if (amberbuttonState == arduino.HIGH) {

red = false;
amber = true;
green = false;

}
if (redbuttonState == arduino.HIGH) {

red = true;
amber = false;
green = false;

}

if (green == true) {
   arduino.digitalWrite(amberledPin, arduino.HIGH);
   arduino.digitalWrite(redledPin, arduino.HIGH);
   arduino.digitalWrite(greenledPin, arduino.LOW);

   if (checkwritten != 1) {

    print("green true");

        output = createWriter("file.txt");
        output.println("1"); //Write "1" to the file
        output.flush(); // Write the remaining data
        output.close(); // Finish the file



      checkwritten = 1;
   }

}

if (green == true) {
   arduino.digitalWrite(amberledPin, arduino.LOW);
   arduino.digitalWrite(redledPin, arduino.HIGH);
   arduino.digitalWrite(greenledPin, arduino.HIGH);

   if (checkwritten != 2) {

    print("green true");

        output = createWriter("file.txt");
        output.println("1"); //Write "1" to the file
        output.flush(); // Write the remaining data
        output.close(); // Finish the file



      checkwritten = 2;
   }

}

if (red == true) {
   arduino.digitalWrite(amberledPin, arduino.HIGH);
   arduino.digitalWrite(redledPin, arduino.LOW);
   arduino.digitalWrite(greenledPin, arduino.HIGH);

   if (checkwritten != 3) {

    print("red true");

        output = createWriter("file.txt");
        output.println("3"); //Write "1" to the file
        output.flush(); // Write the remaining data
        output.close(); // Finish the file



      checkwritten = 3;
   }

}

samg1988

Re: Help needing disabling button input

2 years ago

bump

jeff_g

Re: Help needing disabling button input

2 years ago

You could do this by frames or time. Just set a global variable startTime and compare it with either millis() or frameCount, depending on your preference. When a button is pressed, set the startTime to the measure.

float startTime;
void draw() {
if (millis() > startTime + 1000) {
fill(255);
}
rect(20, 20, 20, 20);
}
void mousePressed() {
startTime = millis();
fill(0);
}

samg1988

Re: Re: Help needing disabling button input

2 years ago

Fantastic that seems to be working.

samg1988

Re: Help needing disabling button input

2 years ago

Does anyone know the line of code to disable all input from an input pin?

samg1988

Re: Help needing disabling button input

2 years ago

bump

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