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IWETHEY Home / IWETHEY Board / Hardware Forum / Edge versus Level triggering of interrupts...
Post #1,384
by Another Scott
7/10/01 11:03:08 PM
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New Edge versus Level triggering of interrupts...
I misrememberd. ISA uses edge, PCI uses level.

[link|http://mailman.real-time.com/pipermail/linux-kernel/2001-March/023682.html|Here's] a bit I found about it. I'm no expert on this stuff. There should be better info out there - especially on Intel's site.

HTH.

Cheers,
Scott.
Post #1,390
by Ashton
7/11/01 1:05:13 AM
Reply
New See what you mean. Heh! an analog! e- problem..
If my reading between lines is close enough:

What he's calling "edge" triggering is.. that sort of detector, commonly using a Schmitt Trigger circuit: a feedback device which enhances the risetime via.. yup pos feedback! to give a thus faster dV/dt as a trigger pulse. What he calls "level triggering" implies an intentionally 'slower" device which is not concerned with dV/dt so much as just "change state when V= x.yz V".

Guess I'll poke around a bit; hard to see how same line from an "Irq detector" under s/w control - could parse the two - but it seems that the Vectra didn't.. too well. How'd ya find That!?

(It's amazing the amount of stuff you can see with a real analog GHz scope on these boards - let alone decipher)


A.
     Presario 7110US, 17", color printer. $1499.97 Deal? - (Another Scott) - (21) - July 9, 2001, 08:49:53 PM EDT
         Sounds good. -NT - (static) - July 9, 2001, 10:12:41 PM EDT
         Wondering re Compaq - (Ashton) - (1) - July 9, 2001, 10:45:39 PM EDT
             My mom's Presario 5000 seems pretty standard. - (Another Scott) - July 10, 2001, 10:31:11 PM EDT
         Careful... - (bepatient) - (16) - July 10, 2001, 12:23:51 PM EDT
             IRQs only an issue for ISA peripherals. -NT - (pwhysall) - (15) - July 10, 2001, 03:18:52 PM EDT
                 Umm could you expand on that? - (Ashton) - (8) - July 10, 2001, 06:37:20 PM EDT
                     Brother, can you spare an IRQ? - (orion) - July 10, 2001, 08:39:36 PM EDT
                     PCI's designed to share IRQs. BUT... - (Another Scott) - (3) - July 10, 2001, 10:13:14 PM EDT
                         Good crib sheet.. - (Ashton) - (2) - July 10, 2001, 10:43:36 PM EDT
                             Edge versus Level triggering of interrupts... - (Another Scott) - (1) - July 10, 2001, 11:03:08 PM EDT
                                 See what you mean. Heh! an analog! e- problem.. - (Ashton) - July 11, 2001, 01:05:13 AM EDT
                     IRQ Sharing In Action - (pwhysall) - (2) - July 11, 2001, 03:07:09 AM EDT
                         Re: IRQ Sharing is a two edged sword. - (a6l6e6x) - July 13, 2001, 12:16:19 AM EDT
                         Amiga also shared IRQs - (SpiceWare) - July 17, 2001, 11:49:10 PM EDT
                 B*llsh*t. - (qstephens) - (5) - July 17, 2001, 05:10:45 PM EDT
                     Some devices do not work well with others - (orion) - (4) - July 17, 2001, 05:14:26 PM EDT
                         Why...________________________________"almost"____?? -NT - (Ashton) - (3) - July 17, 2001, 10:30:27 PM EDT
                             Why almost? - (orion) - (2) - July 18, 2001, 11:09:22 AM EDT
                                 OK though not compelling for a non-techno wanting stability. -NT - (Ashton) - (1) - July 18, 2001, 03:52:58 PM EDT
                                     You want stability for a non-techno? - (orion) - July 18, 2001, 04:53:39 PM EDT
         Keyboard should be fine - (SpiceWare) - July 17, 2001, 11:53:51 PM EDT

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