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Diagnostics

From Don Y <blockedofcourse@foo.invalid>
Newsgroups comp.arch.embedded
Subject Diagnostics
Date 2024-10-12 12:58 -0700
Organization A noiseless patient Spider
Message-ID <veekcp$9rsj$1@dont-email.me> (permalink)

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Typically, one performs some limited "confidence tests"
at POST to catch gross failures.  As this activity is
"in series" with normal operation, it tends to be brief
and not very thorough.

Many products offer a BIST capability that the user can invoke
for more thorough testing.  This allows the user to decide
when he can afford to live without the normal functioning of the
device.

And, if you are a "robust" designer, you often include invariants
that verify hardware operations (esp to I/Os) are actually doing
what they should -- e.g., verifying battery voltage increases
when you activate the charging circuit, loopbacks on DIOs, etc.

But, for 24/7/365 boxes, POST is a "once-in-a-lifetime" activity.
And, BIST might not always be convenient (as well as requiring the
user's consent and participation).

There, runtime diagnostics are the only alternative for hardware
revalidation, PFA and diagnostics.

How commonly are such mechanisms implemented?  And, how thoroughly?

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Diagnostics Don Y <blockedofcourse@foo.invalid> - 2024-10-12 12:58 -0700
  Re: Diagnostics antispam@fricas.org (Waldek Hebisch) - 2024-10-18 20:30 +0000
    Re: Diagnostics George Neuner <gneuner2@comcast.net> - 2024-10-18 17:42 -0400
      Re: Diagnostics Don Y <blockedofcourse@foo.invalid> - 2024-10-18 15:30 -0700
        Re: Diagnostics antispam@fricas.org (Waldek Hebisch) - 2024-10-19 01:50 +0000
          Re: Diagnostics Don Y <blockedofcourse@foo.invalid> - 2024-10-18 19:38 -0700
            Re: Diagnostics antispam@fricas.org (Waldek Hebisch) - 2024-10-19 03:53 +0000
              Re: Diagnostics Don Y <blockedofcourse@foo.invalid> - 2024-10-18 21:17 -0700
                Re: Diagnostics antispam@fricas.org (Waldek Hebisch) - 2024-10-24 17:52 +0000
                Re: Diagnostics Don Y <blockedofcourse@foo.invalid> - 2024-10-24 14:49 -0700
        Re: Diagnostics David Brown <david.brown@hesbynett.no> - 2024-10-19 14:07 +0200
        Re: Diagnostics George Neuner <gneuner2@comcast.net> - 2024-10-19 15:25 -0400
          Re: Diagnostics Don Y <blockedofcourse@foo.invalid> - 2024-10-19 14:32 -0700
            Re: Diagnostics Don Y <blockedofcourse@foo.invalid> - 2024-10-23 05:53 -0700
        Re: Diagnostics Nioclásán Caileán de Ghlostéir <Master_Fontaine_is_dishonest@Strand_in_London.Gov.UK> - 2024-10-20 19:15 +0200
      Re: Diagnostics antispam@fricas.org (Waldek Hebisch) - 2024-10-19 01:25 +0000
      Re: Diagnostics David Brown <david.brown@hesbynett.no> - 2024-10-19 13:57 +0200
    Re: Diagnostics Don Y <blockedofcourse@foo.invalid> - 2024-10-18 15:15 -0700
      Re: Diagnostics antispam@fricas.org (Waldek Hebisch) - 2024-10-19 03:00 +0000
        Re: Diagnostics Don Y <blockedofcourse@foo.invalid> - 2024-10-18 21:05 -0700
          Re: Diagnostics antispam@fricas.org (Waldek Hebisch) - 2024-10-19 13:53 +0000
            Re: Diagnostics Don Y <blockedofcourse@foo.invalid> - 2024-10-19 09:55 -0700
              Re: Diagnostics antispam@fricas.org (Waldek Hebisch) - 2024-10-24 16:34 +0000
                Re: Diagnostics Don Y <blockedofcourse@foo.invalid> - 2024-10-24 14:28 -0700
          Re: Diagnostics George Neuner <gneuner2@comcast.net> - 2024-10-19 15:58 -0400
            Re: Diagnostics Don Y <blockedofcourse@foo.invalid> - 2024-10-19 16:26 -0700
              Re: Diagnostics Nioclásán Caileán de Ghlostéir <Master_Fontaine_is_dishonest@Strand_in_London.Gov.UK> - 2024-10-20 20:08 +0200
          Re: Diagnostics Nioclásán Caileán de Ghlostéir <Master_Fontaine_is_dishonest@Strand_in_London.Gov.UK> - 2024-10-20 19:11 +0200
            Re: Diagnostics George Neuner <gneuner2@comcast.net> - 2024-10-20 15:44 -0400
              Re: Diagnostics Nioclásán Caileán de Ghlostéir <Master_Fontaine_is_dishonest@Strand_in_London.Gov.UK> - 2024-10-20 23:14 +0200

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