[TriEmbed] Suggestions Needed to Improve Quality / Reliability

[Carl Nobile]

Chip,

Are you willing to let other people see your code? We might be able to spot
something that you haven't. I know it's always a good idea to have others
look at my code.

Just a thought,
Carl


On Mon, Jan 23, 2017 at 12:07 PM, Pete Soper via TriEmbed <
triembed at triembed.org> wrote:

> Also, is it a sure thing that the Simblee is pulling the Atmega reset line
> low enough? How much current is the Simblee having to sink to do the reset?
> It might require cutting/repairing a trace, but if the current necessary to
> reset the Atmega could be measured it might show this is only working part
> of the time by serendipity because of a problem with the board. We need to
> be careful to get any regular flux off the boards and moisture might create
> a situation where the Simblee hasn't got the grunt to reset the Atmega. If
> they don't already have them your boards may need unique IDs (e.g. a few
> bytes of the 328's EEPROM) to allow for tracking what's going on with them.
>
> There seem to be one or two things that need their root causes found:
>   1) Failure to reset ("fugue state")
>   2) Atmega "lock up" if it's the cause and not the side effect of (1)
>
> Could the Simblee detect the I2C bus "release" by the Atmega failing and
> tell you exactly when that happens? This might be correlated with voltage
> measurement logs (but you're only logging battery voltage, not the IC's
> VCC, right?) Tacking on a tiny daughterboard to detect and signal something
> to the Simblee would would not be too terrible. In my opinion having two
> processors the way you do is a terrific demonstration of the value of
> postponing optimization. :-)
>
> -Pete
>
>
>
>
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-- 
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Carl J. Nobile (Software Engineer)
carl.nobile at gmail.com
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