momentary pushbuttons issue

[mbunjes 1]

Hi,

 

I've successfully mapped the EFIS WXR, ARPT, DATA etc. buttons on my home build EFIS  for the PMDG NGX. They work but I have to be extremely careful how long I press a button. A millisecond too long and the function won't change,or maybe changes back again to it's original state as if the command keeps being send when I keep it pressed.

Toggle switches work fine.

Is it LINDA or maybe the cheapo interface card I'm using ?

 

Martin

[ScotFlieger 280]

Is it LINDA or maybe the cheapo interface card I'm using ?

 

Hi Martin

 

I think you have hit a well known problem with HMI design of button bounce.  The interface has to distinguish between an intentional release of a button and a momentary bounce. It is FSUIPC that handles your cockpit button presses and passes these to LINDA for action. 

 

It is likely that your interface is detecting/reporting multiple presses.  LINDA will detect between single and repeat presses. If the button is held down continuously it will be seen as a repeated press. If there is a gap in presses they will be seen as separate presses.

 

On way to handle you problem is to avoid toggles and use on / off operations. You could try copying the functions to the users.lua file and rewrite them to deal with the repeating output with a time delay. Any such functions will replace those LINDA uses.

[mbunjes 1]

Hi,

 

Thanks for the reply. I deleted some push buttons in LINDA and remapped them using just FSUIPC and they worked fine so it's probably in the LUA file ?

I can do that for the EFIS buttons as well of course but that would indeed mean avoiding push buttons altogether. (You said toggles but you probably meant push buttons).

 

I would have to look into rewriting LUA files, don't know anything about it.

 

Martin

[ScotFlieger 280]

 

 

You said toggles but you probably meant push buttons

 

Hi Martin

 

I was referring to the various LINDA functions which toggle the switches from on to off and vice versa. These normally test the state of a switch and reverse its selection by calling the appropriate ON and OFF functions.

 

I would refer the hardware lever switch as a Switch and not call it a Toggle.