Re: Underrun error

Subject: Re: Underrun error

From: Rob Yepez <email@hidden>

Date: Fri, 17 Jun 2005 09:51:32 -0700

Delivered-to: email@hidden

The underrun error is returned when there is no data present in the queue.

The queue is setup to only post event changes. For relative elements, this means that all events will be posted. For absolute elements, events are only posted if they differ from the previous transaction.

- Rob

On Jun 17, 2005, at 9:15 AM, Don Clark wrote:

I have a full-speed HID device that works entirely synchronously – I send it a command via a feature report, it sends data via an interrupt in report. Occasionally I get a data underrun (0x2e7) error when executing the getNextEvent() call on the queue. What causes the call to report a data underrun?

Don Clark

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References:

>Underrun error (From: Don Clark <email@hidden>)