2012/4/19 Peter C. Wallace <[email protected]>:
>
> This does rather sound like a watchdog issue (no outputs working)
>

Yes, it actually was watchdog. I saw in dmesg that it had bit after I
increased the servo period from 500 us to 750 us, but completely
forgot about the timeout, which also was set at 500 us.

Now the motors are turning and inputs are fine too.

>
> Note that the 5I23 card returned to you was damaged in the field by excessive
> input voltage (>7V is normally needed to damage the input bus switches which
> was the situation with your returned card)
>

If You mean that shorting to GND of one of the pins inside some chip
(U5, if I recall correctly the email from Oleg), then it was on estop
signal input. I resoldered optoisolator for that signal and wired to
another gpio pin (and left the damaged one unused, shortage of gpio
pins is no more a problem with 5i23) and it worked correctly after
that.

Thanks for the warning, I will try to be even more careful next time,
when creating my own boards with optoisolators etc.

Viesturs

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