DSP在线无缝升级方法研究

Research on DSP Online Seamless Upgrade Method

数字信号处理(DSP)在线升级需要多次断电重启,面对突发情况可能造成升级失败无法回退原版本的情况,为此对DSP在线升级方法进行了优化。通过加入外部看门狗实现整个升级过程无需断电重启。在FLASH分区中引入了AB区方式,实现DSP在线无缝升级并提高了在线升级的容错性。通过实验充分验证了上述优化方法,证明了该在线无缝升级方法的易操作性和容错性,可广泛应用于嵌入式系统在线升级过程。

The DSP online upgrade requires multiple power outage and restarts,and in the face of unexpected situations may lead to upgrade failure and cannot return to the original version.The DSP online upgrade method is optimized.The entire upgrade processes don’t require power outage and restarts by joining the external watchdog.The AB zone mode is introduced in the FLASH partition,and the online seamless upgrade of DSP is realized to im⁃prove the fault tolerance of the online upgrade.The above optimization is fully verified by experiments,experimental results show that the online seamless upgrade method is easy to operate and has fault tolerance,which can be widely used in the online upgrade of the embedded system.