Hi all,
I really new in arm programing,
at First I can start sam-ba programing and in flash tab I receive and send file but suddenly I made mistake and choose serialFlash tab and erased it,among this operation the sam-ba application get stock and after that when I plug USB to my board PC find this Unrecognized and the sam-ba doesn't work any more?

is any way to rewrite serialFlash again?
can I use other programing way?

Does your board have a jumper on the chip-select for the serial flash? Is this a standard development board?

You could presumably use JTAG. Something like a JLink/SAM-ICE can upload and run code.

SAM-BA should be connectable via serial, USB or JTAG on most ATMEL boards. Several of the 7 series boards have ERASE/TST pins to erase and reprogram the SAM-BA loader.