Objective Development Forums 2013-10-12T13:52:54+02:00 https://forums.obdev.at/app.php/feed/topic/1372 2013-10-12T13:52:54+02:00 2013-10-12T13:52:54+02:00 https://forums.obdev.at/viewtopic.php?t=1372&p=25948#p25948 <![CDATA[Re: Device can't be found after wake up from Windows sleep m]]> I´m struggling with a someting similar. I have AVR-USB device based on VUSB. On the site of PC I´m ussing tool based on usbGenericHidCommunication library. Everyting works fine until I do a restart of computer. The PC tool is among autostart applications, so it starts automatically. Problem is, that sometimes communication between PC tool and AVR-USB device works after restart and somatimes not. Any suggestions?

Statistics: Posted by Guest — Sat Oct 12, 2013 1:52 pm

]]> 2008-04-14T10:26:56+02:00 2008-04-14T10:26:56+02:00 https://forums.obdev.at/viewtopic.php?t=1372&p=5023#p5023 <![CDATA[Device can't be found after wake up from Windows sleep mode]]> (Solved, problem come from 2005 LibUSB-Win32 driver, after update to 2007 version. No problem. Thanks.)

hi,

I have got two desktop computer for checking my AVR-USB device.

Computer I: USB 5V power would be cut off from the host automatically at Windows sleep mode.

Observation: Application running and control the device -> Application stop (not ended)and device power off (Windows sleep mode) -> device reset (Window wake up, device reset due to from power off to power on) -> Application still running and control the device as 1st stage

Computer II: USB 5V power wouldn't be cut off at Windows sleep mode.

Problem: Application running and control the device -> Application stop (not ended) and device's AVR is still running (Windows sleep mode) -> device hasn't got reset (Window wake up, since device's power is continues and hasn't turn off ) -> Application still running , but can't find the device

My question: (1) Why my device's connection to the host was lost. I can't see any problem for my other usb device such as card reader and hubs. (2) It seems it is not a problem of re-enumeration. It is because my device hasn't got any reset. Thanks.

Statistics: Posted by Stephen — Mon Apr 14, 2008 10:26 am

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