romboot

代码说明：

  (1)个人针对atmel提供的运行于CPU内13k空间的ram的romboot修改而成。 (2)提供了IRQ和FIQ的测试工作； (3)提供了对外部sdram的数据总线和地址总线的测试工作 (3）提供了对spi dataflash和nor flash的访问操作 (4)实现了romboot在spi dataflash和nor flash中的升级 (5)因为受编译后文件不能超过13kbytes的限制，采用条件编译的方法控制各个功能((1) individuals provided for Atmel running on the CPU with 13k of ram space romboot modified form. (2) provides the IRQ and FIQ testing (3) provide for external SDRAM data bus and address bus of the test (3) provides a spi dataflash and visit nor flash operations (4) realize the romboot in spi dataflash and nor flash the upgrade (5) because of the compiled files should not exceed 13kbytes restrictions, conditions compiled using various functional control)