STM32 in app programming (IAP), custom bootloader

Question

I have attached all my codes in the link below; please review.

There Two programs Program A and B; Prog A is the Application Image Prog B suppost be bootload program

Prog A has Memory address assigned to 0x08004000

After reset, when Button is Pressed MCU goes in Prog B (at 0x08000 000) and toggles LED at 1s

However when button is not pressed, MCU doesn't seems to be running program Please check the debug log in attachments. Anything I'm missing here?

Answer 1

The Bootloader needs to setup clocks and Interrupts precisely. If Bootloader enables the clock then Application should not do the same thing again. It is always best practice in Bootloader to reset the SYS TICK Timer , disable all the peripheral Interrupts before jumping to the Application.

Another thing you might want to consider is the size of your bootloader. If it exceeds 4000(H) bytes then your application would not start.