Bootloader that allows switching between 2 firmwares at boot time.
Developed and tested on a relatively cheap STM32F103CBT6 based "Black pill" board, utilizing the BOOT1 jumper (pin PB2) for switching between 2 firmwares.
Tested by putting i2c-star and stm32-vserprog projects on a single development board.
Linker script memory regions configuration for project1
MEMORY
{
rom (rx) : ORIGIN = 0x08002000, LENGTH = 60K
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
}
Linker script memory regions configuration for project2
MEMORY
{
rom (rx) : ORIGIN = 0x08010000, LENGTH = 60K
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 20K
}