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針對(duì)嵌入式產(chǎn)品程序更新問題,提出了一種基于IAP技術(shù)的STM32單片機(jī)在線固件升級(jí)方案,設(shè)計(jì)了STM32單片機(jī)最小系統(tǒng)硬件電路和USB轉(zhuǎn)串口通信電路,并給出了Bootloader程序、APP程序、PC上機(jī)程序的實(shí)現(xiàn)流程.實(shí)驗(yàn)結(jié)果表明,該方案具有簡(jiǎn)單實(shí)用、穩(wěn)定性高、維護(hù)成本低和設(shè)備使用效率高的特點(diǎn),適用于嵌入式產(chǎn)品升級(jí).
For the problem of updating embedded products program,an online firmware upgrade scheme of STM32 single chip microcomputer based on IAP technology is proposed.This scheme not only elaborates the principle of IAP technology in detail but also provides the design of the minimum system hardware circuit of STM32 MCU,the design of USB for serial communication circuit,and the implementation flow of Bootloader program,APP program and PC program.The experiment results show that the scheme is simple,practical and highly stable.In addition,it can be used to actual embedded product upgrading,significantly reducing maintenance costs and improving the efficiency of equipment.
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