In order to realize the online upgrade of embedded system program,a program update method based on IAP online programming is proposed.Taking STM32L431 controller as an example,the method divides the FLASH region of the controller,storing the bootstrap program,executing program and the program to be updated respectively.The system updates the program to be updated to the FLASH area of the execution program by running the boot program.After the program is successfully updated,the system jumps to the new execution program.The design has successfully realized the online update of FLASH program and has been verified by experiments.It is simple,fast and accurate.
Key words
IAP /
FLASH /
STM32L431 /
embedded system
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