Date: Fri, 16 Jan 2009 15:32:30 -0500 From: Andre Guibert de Bruet <andy@siliconlandmark.com> To: "Gary R. Van Sickle" <g.r.vansickle@att.net> Cc: lcdproc@lists.omnipotent.net, current@freebsd.org Subject: Re: [Lcdproc] LCDProc CVS + PicoLCD on FreeBSD Message-ID: <C6F61B9C-A765-4F35-9BF7-E744B2F19C99@siliconlandmark.com> In-Reply-To: <17C934E643C24C478EAA0C15A2D898EB@DFW5RB41> References: <1b9f9a570901141518q1ba70c73ibc58a4f32811e254@mail.gmail.com><496EE1D9.7090309@nurfuerspam.de> <C15FEE10-7A0C-4E5B-AB57-799FA4094EDA@siliconlandmark.com> <17C934E643C24C478EAA0C15A2D898EB@DFW5RB41>
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On Jan 16, 2009, at 5:09 AM, Gary R. Van Sickle wrote: >> From: Andre Guibert de Bruet >> >> Unfortunately the PicoLCD 2X20 and 4X20 devices present >> themselves as HID devices. > > ...but... they *are* HID devices. Why is this "unfortunate"? The PicoLCD 4X20 devices offer a bunch of different bits of functionality: - A 4x20 character display. - 8 physical buttons. - An IR receiver. It is "unfortunate" because the FreeBSD HID implementation (Along with OSX, Linux and Windows') has no clue what to do why any of these. It is way more useful for a program to be able to attach to the device and interact with it in a user-configurable way. You may want to have the display print out the output of a program (Such as lcdproc or lcdexec), have the buttons map to commonly-used scripts and have the IR controller hooked up to lirc, for example. >> I filed PR usb/128803 and attached >> a patch which quirks the device, so that it doesn't get >> attached to by the HID driver (Thus making it available to >> libusb). It can be found at >> http://www.freebsd.org/cgi/query-pr.cgi?pr=128803 >> . It would be awesome if this would get committed on >> CURRENT and possibly MFC'ed... :) > > Perhaps I'm missing something, but how would that be awesome? > Wouldn't it > be significantly more awesome if these HID devices were communicated > with in > the same manner as any other HID device? Or is FreeBSD's HID > support really > that broken? It has nothing to do with FreeBSD being broken. As stated above, this quirk allows third-party programs to connect to the device and interact with it. Note that this device's smaller brother, the PicoLCD 2X20 is already being quirked in the USB stack. Cheers, /* Andre Guibert de Bruet * 436f 6465 2070 6f65 742e 2042 6974 206a */ /* Managing Partner * 6f63 6b65 792e 2053 7973 4164 6d69 6e2e */ /* GSM: +1 734 846 8758 * 2055 4e49 5820 736c 6575 7468 2e00 0000 */ /* WWW: siliconlandmark.com * C/C++, Java, Perl, PHP, SQL, XHTML, XML */
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