In message E1CBvO5-00023a-SE@sc8-sf-mx1.sourceforge.net you wrote:

i am new to arm.i want to write my board's codes.bu i don't know how to do ? i readed the readme in the top level directory . but i still puzzled. i have made a directory named my board .but the xxxx(my arm's type).c flash.h i don't how to write .

Hire somebody who has a clue, and stop posting "I don't know how to write this and that" questions.

Sorry if this sounds rude, but you posted 9 more or less identical messages to this group, 8 of them just today, and ALL of them contain trivial questions which you should be able to answer yourself with just a minimum of code reading.

Wolfgang Denk