RE: USB Transimssion is slow

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From: Robert Magyar (RobertMagyar_at_discussions.microsoft.com)
Date: 10/14/04


Date: Thu, 14 Oct 2004 09:53:04 -0700

Possibly an isr handler problem, I'd guess that isr logic is working
correctly when the audio isr hits, but not when usb isr happens. The usb
maybe recovering after a timeout.

"Yu" wrote:

> Hi,
>
> I have a .Net 4.2 system that is based on SMDK2410.
> When I use ActiveSync to copy file from PC to PDA by USB, I found the
> transmission is slow.
> However, if I start to play mp3 while transmitting data, I found the the
> transmission is faster.
> Why ?
>
> Yu.
>
>
>



Relevant Pages

  • Re: Periodic processing/fast timer
    ... If you want to do it in the ISR, just put the code in the ISR handler in the ... ISR just does minimal processing to determine the source of the interrupt ... I assume this is a completely custom USB ...
    (microsoft.public.windowsce.app.development)
  • Re: USB real-time performance
    ... Huh? ... Unless the ISR for the USB is ... poorly written there should be no impact on a thread with a higher priority ...
    (microsoft.public.windowsce.platbuilder)