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labsw/LOG: added more details on occasional labsw malfunction

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Werner Almesberger 2011-09-07 04:24:05 -03:00
parent 757f19cd7b
commit a42bf17291
1 changed files with 8 additions and 3 deletions
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@ -174,9 +174,14 @@ Pending:
3) drive opto LEDs from 3.3 V instead of 5 V (NOT ! Regulator 3) drive opto LEDs from 3.3 V instead of 5 V (NOT ! Regulator
can only provide 100 mA, which wouldn't be enough if more than can only provide 100 mA, which wouldn't be enough if more than
two opto-couplers are active.) two opto-couplers are active.)
- labsw occasionally gets some configuration bits wrong. This may be - labsw occasionally gets some configuration bits wrong. The pattern
a problem with the power supply or with USB. Consider some or all of observed so far it that, in an attempt to turn on CH1, then CH2, CH1
the following improvements: comes on normally while CH2 either doesn't come on at all or the
relay switches but the LED doesn't.
This may be a problem with the power supply or with USB. Consider
some or all of the following improvements:
- follow SiLab's recommendations for regulator bypassing more closely - follow SiLab's recommendations for regulator bypassing more closely
- enable the VDD monitor to catch brown-outs - enable the VDD monitor to catch brown-outs
- add ground areas to shield CPU and USB - add ground areas to shield CPU and USB