数据无损的远程代码更新的设计与研究

摘要

为解决基于GPRS的传统无线远程代码更新时数据采集大量丢失的问题，分析研究bootloader机制，提出一种分段式接收远程代码并集中更新的设计方案。基于Arm Cortex M4内核，结合GPRS透明传输技术，依托于用户应用程序，分段接收远程代码并存储于SD卡中，由特制的bootloader读取SD卡内容，完成代码更新，缩减代码更新过程中屏蔽数据采集的时间。实验结果表明，该方案可实现2 HZ以下数据采集无丢失的代码更新。%To solve the problem that traditional GPRS‐based wireless remote code update loses a large amount of data collected , a design scheme that receiving the remote code segmentally and updating it concentratedly was proposed by analyzing the boot‐loader mechanism .Based on Arm Cortex M4 kernel ,combined with GPRS transparent transmission technology ,the design re‐lied on the user application to receive remote code segmentally ,and then the code was stored in the SD card and read by a special bootloader to complete the code update .The shielded data acquisition time was reduced during the code updating process .Results of test show that the scheme can achieve code update without data loss below 2 HZ frequency .