针对嵌入式设备投入实际应用后需对应用程序算法改进、BUG修补的问题,为了提高软件更新的简便性、降低维护难度,设计了一种基于WiFi的自动远程升级系统。在该系统中,以STM32F4为核心控制器,对其内部Flash存储空间进行有效分配,设计IAP功能,利用WiFi模块接入网络使用TCP协议传输数据,STM32F4接收到远程服务器信息后进行分析,排除各种异常情况,将完全正确的应用程序写入Flash,实现嵌入式软件的远程升级。本文给出了具体的系统设计、程序流程及部分核心代码,实验验证了系统的可行性,可为嵌入式智能设备的功能完善提供参考。

Aiming at the problem of application algorithm improvement and BUG patching after embedded devices are put into practical application,in order to improve the ease of software update and reduce the difficulty of maintenance as much as possible,a WiFi-based automatic remote upgrade system is proposed.In this system,STM32F4 is used as the core controller to effectively allocate its internal Flash storage space,design the IAP function,use the WiFi module to access the network and use the TCP protocol to transmit data. After the STM32F4 receives the remote server information,it analyzes and excludes each in this abnormal situation,the completely correct application program is written into Flash to realize the remote upgrade of the embedded software.This article gives the specific system design,program flow and part of the core code.The experiment verifies that the proposed system has good feasibility and can provide a reference for the functional improvement of embedded smart devices.