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i am working on usb device driver.i have keil board 2300(lpc2368). & keil Uvision3.34 .now i am using gnu ARM THUMB toolchain for windows of cygnus version3.3.1.i am using USBHID code which is available on keil.com. now i convert that code compitable for gnu complier.such like Interrupt syntex.__packed keyword,etc. now when i download this code in flash by JTAG on board , in windows 98 usb conection can not creat.and pc found device as a unknown device.& HID connection make fail. what kind of problem i cannot find.if you have any solution or idea plz give me or mail me.