On Jan 9, 2011, at 7:04 PM, Xiaofan Chen wrote: > There are not many Open Source common USB stack out there > for the device side. But if you count Linux (gadget), then it is > meant for many different MPU family out there. But you probably > would not consider them as USB MCU. Yes, I meant "device side", but had not considered that many linux =20 devices do implement a device-side as well. Thanks for pointing that =20 out! BillW --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .