基于串口通信的DSP在线烧写技术研究

为了解决DSP嵌入式系统某些特殊应用场合升级不方便、维护困难的问题,提出了一种基于串口通信向片内Flash在线烧写程序的方法.描述了该在线烧写方法的基本思想和实现步骤,并结合工程实际需要,优化了接收升级指令的时机,并在片内Flash设置应用程序备份区,进一步提高了烧写的可靠性和安全性,增强了系统的容错性和自愈恢复能力.实验结果表明,该方法有效可行,方便可靠,相比于传统基于JTAG烧写,可摆脱仿真器进行程序升级,提高了嵌入式系统的可维护性.

Research on on line programming techniques for DSP based on serial communication

In order to solve the problems of upgrading inconvenience in some DSP embedded systems,this paper proposes a method of on-chip Flash programming based on serial communication.This paper describes the basic idea and implementation steps of the online programming methods.Considering the needs of practical projects,it optimizes the timing of receiving upgrade instructions and allocates application backup area in the on-chip Flash.With these steps,the reliability and security of the system are improved.Besides,the system's fault tolerance and self healing ability are enhanced.Experiment results show that the method is effective,simple and reliable.Compared with traditional programming method based on JTAG,it can be operated off the simulator,which improves the maintainability of the embedded system.