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I'am working with at91sam7x256 and in my program the usart interrupt dosen't work correctly ! I communicatinon with atmel but it isn't fix yet.
thise is my program...pleas help me
www.4shared.com/.../usart16__2_.html
my mail :salehi.elc@gmail.com
...is very often the most likely reason.
If it fired once, then didn't fire again, then that almost certainly means that you didn't put it back into the correct state to fire again.