Bootstrap启动代码是官方提供的一级启动代码，包括汇编和C语言两部分组成。对AT91SAM9260来说编译完成后，代码长度必须小于4KB，烧写到dataflash中的0x00000000.-Bootstrap code is the official start of a startup code, including assembly and C language two parts. For AT91SAM9260 is compiled, the code length must b