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Problem while relocating a code with uvision

Aina R over 7 years ago

Hello,

I am developping a bootloader for a STM32F407 using Keil uvision 5 as IDE.
My bootloader shall start at the beginning of flash, (0x0800 0000), as in this microcontroller this is where the littlest sector is. As this is the default start address for Keil, I got no problem to flash and run it.

But when I try to re-compile and link application executable to start at sector 5 in flash (0x0802 0000), I get issues...
Although the .map file generated by my linker shows that application code and vectors are relocated in 0x0802 0000, when I flash and start my target with my application, the reset is done at bootloader's reset vector... What did I do wrong?

Thanks a lot in advance.

Best regards

Top replies

Westonsupermare Pier over 7 years ago +1 verified

The loader has to transfer control to your app. You can't make the CPU reset to 0x08020000 You need to make sure SystemInit() in your app sets SCB->VTOR to point to your vector table for that to function...