摘要： 阐述二次引导程序的引导机制和工作原理，利用复杂可编程逻辑设备进行逻辑译码，对整个Flash空间进行分页控制，实现地址重映射。采用链接器中的命令选项生成引导表，设计大规模程序代码的二次引导程序。测试结果表明，该方法可以实现规模大于2 MB的代码的二次引导，为大型嵌入式系统的软件开发奠定了基础。

关键词: 嵌入式系统, 数字信号处理器, 二次引导程序, 引导表

Abstract: This paper expatiates the principle of secondary Bootloader and uses Complex Programmable Logic Device(CPLD) for logic decoding. It controls the pagination of Flash space to complete the second address mapping. The linker command options are used to create boot table and the secondary Bootloader for large-scale program code is designed. Test results indicate that this method can complete the secondary Bootloader for codes with 2 MB or larger scale and lay a good foundation for software development of large-scale embedded systems.

Key words: embedded system, Digital Signal Processor(DSP), secondary Bootloader, boot table

中图分类号: 

• TP303