How to IAP in STM32 correctly, there is some problems

[kiraversace]

OK, Here is my program area.
0x08000000 30K for the BootLoader
0x08007800 226K for the main program
I use the offical BootLoader, So I shoud change these place, I do not know if I am right?

1. open the ldscript.ld file, change the flash offset?
   
   
2. open platformio.ini change the download offset?
   
   
3. set the SCB->VTOR = 0x08007800;
   I know that if I set it in the setup(), it is not right, so I add it in the system_stm32l4xx.c like below,
   
   

Then I open the segger j-flash and burn the bootloader

then I use the platformIO download the program,
Then I see the log, my bootloader run suceessfully , but not jump into my user app?

could you help me, there is no same problem in the community?

[maxgerhardt]

@kiraversace

If you add

build_flags = -DVECT_TAB_OFFSET=0x7800

it should work without system_stm32l4xx.c code modifiations, but the current one is also “okay”. Not sure why it doesn’t work.

What’s the source code for the bootloader?

[kiraversace]

Would you like to see this link, there kind man give me some tips.
stm32duino offical
I only change 3 places in my application, first the ld file, change the FLASH as picture,then platformio.ini as follow

,if I debug my application, step into debug mode then run, it can work sucessfully, see the 0xE000ED08(
SCB->VTOR ) it was 0x08007800, if I quit debug mode, and the MCU reset ,and it run from the bootloader, it can not jump into the application, and see the 0xE000ED08 always be 0x08000000.

I don’t know why?

[kiraversace]

I have slove the problem

The difference between two jump code as the arrow,
__set_MSP**(*(__IO **uint32_t***) APPLICATION_ADDRESS);
can work well in the GCC and KEIL, the other one just work in KEIL