实现DSP重构以及免疫单粒子翻转的新方法

New Method for DSP Reconstruction and Immune Single Particle Flip

针对在轨卫星控制器重构时无法使用JTAG烧录,其工作环境限制而导致更新DSP程序难的问题,以DSPTMS320F28335为例,提出一种通过串口方式在线重构DSP控制器的方案;又由于卫星在轨时DSP控制器有可能被单粒子打翻,文中提出一种主控程序冗余,以及定期或指令形式重构主程序的方法,降低单粒子翻转使控制器失效的可能性。实验结果证明,该方法简单适用,运行稳定可靠,易操作,可实现DSP TMS320F28335上电后由重构引导程序接管,解决DSP在轨重构的问题,有效降低被单粒子打翻的可能性,可应用于商业航天航空嵌入式领域。

According to the problems of joint test action group(JTAG)being not used during on-orbit satellite controller reconstruction and being difficult to update DSP program due to the limitation of working environment,taking digital signal processing(DSP)TMS320F28335 as an example,a scheme of online reconstruction DSP controller through serial port is proposed.Because the DSP controller may be knocked over by a single particle while the satellite is in orbit,a method of redundancy of the master control program and periodic or instruction reconstruction of the master program to reduce the possibility of invalid of the controller due to the flip of the single particle is proposed・Experimental results show that the method is simple and suitable,stable and reliable operation,and easy to operate,which can realize the reconstruction program of DSP TMS320F28335 take over the controller after power on,solve the problem of reconstruction of DSP in orbit,and greatly reduce the possibility of being knocked over by single particle.It can be applied to the commercial aerospace embedded field.