Date:2011-09-07 09:24:05 (7 years 11 months ago)
Author:Werner Almesberger
Commit:a42bf172917506b086951465cb7938e949f192ea
Message:labsw/LOG: added more details on occasional labsw malfunction

Files: labsw/LOG (1 diff)

Change Details

labsw/LOG
174174  3) drive opto LEDs from 3.3 V instead of 5 V (NOT ! Regulator
175175     can only provide 100 mA, which wouldn't be enough if more than
176176     two opto-couplers are active.)
177- labsw occasionally gets some configuration bits wrong. This may be
178  a problem with the power supply or with USB. Consider some or all of
179  the following improvements:
177- labsw occasionally gets some configuration bits wrong. The pattern
178  observed so far it that, in an attempt to turn on CH1, then CH2, CH1
179  comes on normally while CH2 either doesn't come on at all or the
180  relay switches but the LED doesn't.
181
182  This may be a problem with the power supply or with USB. Consider
183  some or all of the following improvements:
184
180185  - follow SiLab's recommendations for regulator bypassing more closely
181186  - enable the VDD monitor to catch brown-outs
182187  - add ground areas to shield CPU and USB

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