Lpc2000

@Eric: Sorry I have not used USB till now. So I can't give you any 
information.

Thanks for the information.

Yes, there are a lot of examples on the EA page. But they are coded 
for the GCC and I have some problems concerning that fact.

In the UART Lib as an example they use:

cpsr = disableIRQ();                  // disable global interrupts
U0IER &= ~UIER_ETBEI;                 // disable TX interrupts
restoreIRQ(cpsr);                     // restore global interrupts

but in Crossworks I can´t find the function disableIRQ with returns 
the cpsr and I also can´t find the function restoreIRQ(xxx).

When using the functions from the winarm example-pages with 
crossworks, it doesn´t work.  

How can I port the code for crossworks?

Thanks for your help!

Mathias