Re: [PD] HID double triggers

I've had this problem before with [hid], apparently it's a hardware issue called 'debouncing', which is often ignored because it is often irrelevant (pushed is pushed, for game controllers, rather than a button-on/button-off signal used for most music systems).

You can deal with the problem in pure data by using a trigger, float and delay of one millisecond. See the attached patch, click the message boxes and watch your terminal for the result.

I hope this helps.

Andrew

Date: Wed, 18 Apr 2012 16:53:44 +0100 From: james@4thharmonic.com To: pd-list@iem.kug.ac.at Subject: [PD] HID double triggers

Hi list,



recently I've been playing around with [hid] again and still have
the issue with double triggers on linux (see previous post here).



I've downloaded the latest version of

Pd-0.43.1-extended-ubuntu-lucid-i386.deb
but I have the same problem with my existing Arch Linux installation
on my laptop as well.



It works fine on Mac 10.6. The problem is that I basically get two
identical events for each key press and release, ie:



[hid] 0.7, written by Hans-Christoph Steiner
  <hans@eds.org>

      compiled on Apr 15 2012 at 08:12:47 

  [hid] opened device 4 (/dev/input/event4): AT Translated Set 2
  keyboard

  print: key key_u 1

  print: key key_u 1

  print: key key_u 0

  print: key key_u 0



Is anyone else having this problem?



thanks



James

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