Button short or long press

cazzillopo

Hi, I have a button on pin 0 that need to have the following behavior: When short press (0,2 second) it must set out 8 high
When long press (1 or more second) it must set out 9 high
I can not solve this problem
Someone have a solution ?
Thank You very mutch.

JonnyMac

You might do something like this:

Get_Button:
  btimer = 0
  IF (TrButton = 0) THEN Get_Button
  DO WHILE (TrButton = 1)
    PAUSE 100
    btimer = btimer + 1
  LOOP
  RETURN

The value in btimer will tell you how long the button was held -- you can dictate what logic to apply from there. Note that this subroutine blocks the program until the button is pressed.

Genetix

Chapter 2 of Applied Sensors has code for Short and Long button clicks.
http://www.digikey.com/Web%20Export/Supplier%20Content/Parallax_149/PDF/Parallax_AppliedSensorsGuide.pdf?redirected=1

cazzillopo

Thank you both.
I'll try to inplement your suggestion in my project.

mlerley

Thanks for this! I modified it a bit so that it can be used in a non-blocking fashion inside of a spinning main loop. pReadButton is a pin that goes low when pressed so we'll only enter the loop here if the button is pressed. The clicks are counted; I did a 250ms pause as it seems natural for the type of button I have; YMMV. The select loop below allows for granular control of button push length, although press length accuracy here won't be high. I was able to easily trigger 1, 2 and 3 second presses.

Main:
  ' stuff happens...

  B=0
  DO WHILE pReadButton = 0
    PAUSE 250
    B=B+1
  LOOP

  SELECT B
    CASE 1
      ' quick press (< 250ms)
    CASE >19
      ' 5 seconds
    CASE >3
      ' one second
  ENDSELECT

  ' other stuff happens...

goto Main