This is an application running directly on the SBC? Can you enable logging in the library and post the output - also, are there any USB related messages in the system log?
You shouldn't have any trouble updating the LCD every second.
Yes it run directly on SBC. It is started by deamon which run it on boot... Application is written in VS2010 and runmono installed by this instructions:LINK
currently when Im for testing puroposes change updating lcd every 2 sec work more than 12h without problem.
current log's from control panel Im upload in attachment.
One day when Im first time test device and it has stop working Im get next errors:
04/15/2011 00:06:32: UserLogin() : Phidgets.PhidgetException: PhidgetException 5 (Phidget not physically attached.)
at Phidgets.TextLCDRow.set_DisplayString (System.String value) [0x00000] in <filename unknown>:0
at Client.Module.UserLogin (System.String RFIDCode) [0x00000] in <filename unknown>:0
Restarting application is not work(kill process and start it again). Only reboot has fix problem...