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Discussion Groups | TMS320C55x | USB Connect/Disconnect

Technical discussions about the TI C55x DSPs (including the c5501, c5502, c5503, c5507, c5509, c5510 and OMAP5910).

  

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USB Connect/Disconnect - sylvio_nanoptix - Mar 11 9:54:00 2005





Hi Everyone,

Yet another USB dilemna with the TMS320VC5509.

I am currently using the USB Driver from DDK 1.1 and I am having
problems getting the USB device to reconnected if I unplug and replug
the USB cable. Basically, if I unplug the USB cable I can't get it to
communicate again after I replug it again.

Before I really get down to the nitty gritty, I was wondering if
someone else had success with modifying the USB Driver from DDK 1.1 or
if I should just rewrite it all over again for myself.

Thanks in advance for all your comments!

Sylvio





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Re: USB Connect/Disconnect - Author Unknown - Mar 13 13:41:00 2005


That DDK stuff was a pile of junk. Just use the native CSL USB methods
and they work much better. I can connect/disconnect and never have a
problem. Make sure you run the CPU clock at least 48MHz. If it runs
slower than 48MHz it can miss interrupts and cause USB problems. Other
than that, it seems to work pretty well.

On Fri, 11 Mar 2005, sylvio_nanoptix wrote: >
>
> Hi Everyone,
>
> Yet another USB dilemna with the TMS320VC5509.
>
> I am currently using the USB Driver from DDK 1.1 and I am having
> problems getting the USB device to reconnected if I unplug and replug
> the USB cable. Basically, if I unplug the USB cable I can't get it to
> communicate again after I replug it again.
>
> Before I really get down to the nitty gritty, I was wondering if
> someone else had success with modifying the USB Driver from DDK 1.1 or
> if I should just rewrite it all over again for myself.
>
> Thanks in advance for all your comments!
>
> Sylvio




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