Does anyone know if there are any issues with the PE USB Host stack and the K20 boards? I didn't see any examples so I created a new one and incorporated the source from the examples. I have found that the USB interrupt doesn't seem to work. When you plug in or remove a device the ISR routine for PE USB isn't called and non of the interrupt registers show anything.
When I use the non-PE files/project, the programs run fine. I checked the NVIC and USB0 settings between the PE and non-PE versions and they are fine. All the correct interrupts are enabled, the USB interrupt enable registers are correct as well. The Vectors file layout pretty closely matches the non-PE version.
Any ideas? I would prefer to use PE if possible.