【micropython】Improved reset to bootloader

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【micropython】Improved reset to bootloader [Copy link]

 

Entering the bootloader directly from software (ST system bootloader or custom mboot) is unreliable and relies on the peripherals being enabled by the application for reliability. It is also not possible to enter the bootloader if the WDT is enabled.

This patch changes the way the bootloader is entered from software. A full system reset is performed and then a transfer to the desired bootloader is made early in the boot process. The first two words of RAM (stack) are reserved to store the flags of the bootloader after reset.

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