基于DM642的FLASH多页加载方法研究与实现

为了实现DSP系统可以脱离仿真器和PC机独立运行,同时满足系统便携性和实时性的要求,DSP系统需要具备自启动加载FLASH中应用程序的功能.基于DM642平台,本文在分析了DM642自启动原理的基础上,提出并实现了用FPGA控制大容量FLASH多页加载的方法,并详细阐述了FLASH多页加载的实现过程,编写了基于C语言的二次引导程序,为DM642系统的开发提供了新方向、新途径,具有较大的实际意义.

Study and implementation of multi-pages FLASH bootloader based on DM642

To achieve the DSP system bootstrapping without relying on the host and emulator and to meet the requirement of portability and real time ability of the system, self startup procedure from the FLASH memory is usually needed by the DSP system. Through the analysis of the bootloading theory based on DM642, a method of multi pages bootloader for large capacity flash memory with FPGA control is proposed and realized. The process of the above method is elaborated and the method is implemented by the secondary bootloader program written by C language. It is proved that this method provides a new direction for system development based on DM642 and is of great practical significance.