Objective Development Forums 2010-03-28T08:10:36+02:00 https://forums.obdev.at/app.php/feed/topic/4021 2010-03-28T08:10:36+02:00 2010-03-28T08:10:36+02:00 https://forums.obdev.at/viewtopic.php?t=4021&p=13890#p13890 <![CDATA[Re: Why error -71 when doing control transfer?]]>
When I have the scope probes attached, I can easily introduce noise (I'm not sure if it should be that easy to introduce noise, but that is another matter).

Whenever there is noise, the vusb firmware does not seem to recover.
It never responds from the host again.
I can only get vusb to respond by perform a USB reset from the host.

Is this normal behaviour?

Statistics: Posted by bt101 — Sun Mar 28, 2010 8:10 am

]]> 2010-03-19T02:56:49+02:00 2010-03-19T02:56:49+02:00 https://forums.obdev.at/viewtopic.php?t=4021&p=13728#p13728 <![CDATA[Why error -71 when doing control transfer?]]> For the firmware I'm using the hid-data example code.
The loop will run successfully for days and then I'll get an error -71 on the host when reading or writing.
I keep getting the -71 and I can only get it working again by unplugging/replugging the USB connection.

When the host is getting the -71 error, there is nothing in the host log to indicate a USB problem, and I can still perform an lsusb and it shows that the host still sees the device.

The VUSB circuit is built to the VUSB spec. I'm using an atmega168.

Any thoughts on what is happening/how to troubleshoot?

Statistics: Posted by bt101 — Fri Mar 19, 2010 2:56 am

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