Lpc2000

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Is there _any_ open-source USB code for the LPC series?

I looked at the Keil USB examples and one of the things I wonder
about is the fact that the USB drivers run almost entirely in
interrupt context.
I think this makes things complicated for more complex USB
devices, like USB mass storage connected to SD/MMC through SPI.
The interrupt routine probably shouldn't have to wait for other
devices, so I suppose an OS is needed to let the interrupt trigger
a worker task for stuff that takes more time (like retrieving a
sector from the SD/MMC card).

How are other USB stacks generally structured?
Do they need an OS?

Kind regards,
Bertrik


Steve Franks wrote:
> Ian,
> 
> Fear not.  If you want it for GCC, I'm working on it, and I don't give up
> easily.  However, I'm not getting paid for it at the moment; I just think
> everyone should be able to evaluate the hardware & examples w/o buying into
> high-priced tools (I'm also a firm believer that GCC is of equal or higher
> quality than any alternative) [I also like templates which no one else seems
> to implement in the embedded world - please, someone contradict me].
> 
> As such, you may have to be patient; perhaps we could collaborate a bit?
> 
> On the other hand, if you just want to see that your board works, download
> the limited (free) Keil tools.  You only have to add one line to their
> examples to make them work on the IAR/Olimex 2148 boards.  I'd suggest a
> reply off-list if I can be of help to that ends (it's been discussed),
> unless it's of general interest.
> 
> I already have GCC-ported copies of the Keil examples that build, but don't
> talk correctly - windows complains of Usb errors.  I'm suspecting an
> interrupt problem, although I don't rule out other madness, like
> struct-packing, or crt.S - type problems.  I've even got the warnings out of
> the build, still no-go.
> 
> -> If anyone on list understands differences between Keil & GCC from a
> compiler-behavior standpoint, I'd love to hear from you.
> 
> Steve
> 
> 
> 
> ________________________________________________________________________
>>
>> Message: 24
>>    Date: Mon, 9 Jan 2006 12:15:37 -0800
>>    From: "Joel Winarske" <joelw@...>
>> Subject: RE: Re: LPC2148 USB
>>
>> Hi Ian,
>>
>> > Would you be willing to share your IAR ports of the Keil Code?
>>
>> You missed my reply on a similar request.  Short answer is no.  Long
>> answer
>> is that I've invested a fair amount of time and $1k on a USB hardware
>> analyzer.  Hence it would not be fair to my wife and three small children.
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