Running non-libmaple binaries

(3 posts) (1 voice)

ianmga
Member

Is it possible to use the Maple bootloader to load non-libmaple binaries?

I am building (after porting) the ST library examples with Keil into binaries and load them to 0x80005000 with the Maple booloader and dfu-util. The basic blinky light works but the UART one does not when I enable RX interrupts. However, when I target it to 0x80000000 and flash it with the serial bootloader the UART example works fine, so my guess is that I am doing something wrong with the interrupt vector table.

Is there something special about the way the bootloader handles the vector table or does it look like it's something on my side (very possible!)?

Posted 5 years ago #
ianmga
Member

Where in the bootloader or the library is the vector table pointer (SCB_VTOR) set to the actual vector table? I can't find it anywhere.

Posted 5 years ago #
ianmga
Member

Success at last! I set the SCB->VTOR=0x8005000 or 0x20000C00 at the very beginning of main() and that did it so I thought this was missing from the bootloader. Alas, adding it to the bootloader didn't fix the problem, and it turned out that the ST library sets SCB->VTOR during SysInit (between bootloader and main).

So there, setting this value correctly during the initialization will let you use Maple bootloader with dfu-util to load any binaries.

Posted 5 years ago #

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