I have a custom bootloader that I flash to the first sector (0x8000000) and when it receives a new program it loads it to 0x8003000. I can jumps to the user application,and also jumps from user application to the bootloader.
I want to know if there are any methods to tell the custom boot loader, there are not a simple start-up, but it's a jump from user application.
can i share a variable between bootloader and user application?
Thank you in advance !