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Groups > comp.arch.embedded > #26047
| From | Mikko OH2HVJ <mikko.syrjalahti@nospam.fi> |
|---|---|
| Newsgroups | comp.arch.embedded |
| Subject | Re: Watchdog for an embedded Linux-based system |
| Date | 2017-03-13 10:09 +0200 |
| Organization | A noiseless patient Spider |
| Message-ID | <m2fuih38ek.fsf@mspro.in.enevo.com> (permalink) |
| References | <oa5j4h$hhc$1@dont-email.me> |
pozz <pozzugno@gmail.com> writes: > So I'm thinking to add an external watchdog that: > - monitors the Linux system activity (maybe a pin that goes high and > low at a certain frequency by an application); > - open and close again a small relay that brings the main power supply > voltage rail to the Linux system > > Do you have better suggestions? Sounds good to me. If you have the external watchdog as a separate MCU (with super simple firmware and an external HW watchdog of it's own), you can also ask the WD to cycle power on purpose. Make sure you also take down all the incoming IO signals, they may keep some part of the SOM powered and locked up. I've seen 0.4V to an IO pin keep SRAM registers in a state that locked the system. -- mikko
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Watchdog for an embedded Linux-based system pozz <pozzugno@gmail.com> - 2017-03-13 08:55 +0100
Re: Watchdog for an embedded Linux-based system Mikko OH2HVJ <mikko.syrjalahti@nospam.fi> - 2017-03-13 10:09 +0200
Re: Watchdog for an embedded Linux-based system pozz <pozzugno@gmail.com> - 2017-03-13 10:06 +0100
Re: Watchdog for an embedded Linux-based system Joe Chisolm <jchisolm6@earthlink.net> - 2017-03-13 12:11 -0500
Re: Watchdog for an embedded Linux-based system Tim Wescott <tim@seemywebsite.really> - 2017-03-13 11:24 -0500
Re: Watchdog for an embedded Linux-based system Paul <paul@pcserviceselectronics.co.uk> - 2017-03-14 20:16 +0000
Re: Watchdog for an embedded Linux-based system Don Y <blockedofcourse@foo.invalid> - 2017-03-13 17:02 -0700
Re: Watchdog for an embedded Linux-based system Dimiter_Popoff <dp@tgi-sci.com> - 2017-03-14 12:01 +0200
Re: Watchdog for an embedded Linux-based system Don Y <blockedofcourse@foo.invalid> - 2017-03-14 09:09 -0700
Re: Watchdog for an embedded Linux-based system Dimiter_Popoff <dp@tgi-sci.com> - 2017-03-14 19:28 +0200
Re: Watchdog for an embedded Linux-based system Don Y <blockedofcourse@foo.invalid> - 2017-03-14 11:07 -0700
Re: Watchdog for an embedded Linux-based system Dimiter_Popoff <dp@tgi-sci.com> - 2017-03-14 20:37 +0200
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