[PD] HID double triggers
Andrew Faraday
jbturgid at hotmail.com
Wed Apr 18 20:29:04 CEST 2012
From: jbturgid at hotmail.com
To: pd-list at iem.kug.ac.at
Subject: RE: [PD] HID double triggers
Date: Wed, 18 Apr 2012 18:27:15 +0000
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 at 4thharmonic.com
To: pd-list at 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 at 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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