Introduction - If you have any usage issues, please Google them yourself
Microcontroller serial port to upgrade the underlying process can be applied to any self-programming of the MCU, this works by default located in the 0xF000 address, according to need changes in the configuration file. Users simply defined as the application function pointer void (* update) () = 0xF000 then call update () you can jump to the serial port upgrade procedure to upgrade operations.