【摘要】 本文介绍了嵌入式系统Bootloader的基本概念及作用,阐述了在ARM7嵌入式系统中实现Bootloader的基本流程,重点分析了Bootloader中关于外部中断(IRQ)处理的详细过程。改善了Bootloader中命令控制台操作使用不方便的缺陷,增加了对方向键控制能力的支持。更多还原

【Abstract】 This article introduces the basic conception and function of bootloader in embedded system, and expatiates on the process of realizing the bootloader in ARM7 embedded system. Then, the handling of an external interrupt is emphatically analyzed. Finally, it adds the control of the direction key to the bootloader and makes the operation of command console more convenient.更多还原