TMS320F240DSP片内Flash串行加载及校验技术

在DSP的实际应用场合中,有时为了内容的加密,不适合留出JTAG口;有时整个设备不宜拆卸,只要留出简单的电路接口对DSP片内Flash进行程序的加载和检验;有时不需重新加载用户程序,而是需要进行程序代码可靠性、正确性校验.基于此,本文提出了串行加载及校验的实验思路,分析了TMS320F240 DSP片内Flash的结构和特点及上电复位运行的特性,阐述了一种基于SCI接口的TMS320F240 DSP片内Flash串行加载及校验技术,详细介绍了该技术的方法、技术难点以及软件实现流程.该技术可在整机状态下完成对DSP片内Flash进行程序加载及程序代码可靠性、正确性校验.实验结果证明该串行加载及校验方法电路简单,加载结果有效且可靠.

Serial loading and verification technology of TMS320F240DSP on-chip Flash based on SCI

In the practical application situation of DSP,sometimes for the content encryption,it's not suitable to keep the JTAG mouth.Sometimes the entire equipment is not suitable to be disassembled,so long as puting apart the simple electric circuit connection to carry on the procedure to DSP internal Flash the increase and the examination;Sometimes it's not necessary to reload the user program,but to carry on the procedure code reliability,the accurate verification.Based on this,the author proposed the serial increase and the verification experimental mentality.This article elaborated one kind of program and verification technology of TMS320F240 DSP on-chip Flash based on SCI.The technical method and difficulty,as well as the software realization flow,were introduced in detail.This technology can program the DSP on-chip Flash and complete the procedure code reliability and the accurate verification,under entire machine condition.The experimental result proved this serial load and verification method is simple,effective and reliable.