The Cortex-M3 platform STM32 launched by ST has two Flash areas inside. One is System Flash, an area officially reserved by ST for storing IAP code. This area is not open to users and only provides UART communication interface for IAP upgrade; the other area is User Flash, which is free for users to use. STM32 comes with USB 2.0 Device interface. What should be done if the IAP function needs to be implemented through the USB interface? Here is how to use the DFU code provided by ST STM32xx USB Development Kit to implement the above function. I use STM3210EVB to demonstrate this function. Please download the following code compression package and application software before reading:
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