STM32F746GDISCOVERY _unhandled_exception problems

[rolanddixon]

I am having problems with the STM32F746GDISCOVERY board at startup. Execution jumps straight into _unhandled_exception before it gets to main(). I have tried chibios161 and chibios_trunk with GCC 4.7, 4.8 and 4.9. This is happening for all STM32F7 examples in the chibistudio workspace. I have tried changing compiler optimisation values, fpu settings, LTO settings, etc. with no success. Is there anyone else experiencing these problems? Any solutions?

[Giovanni]

Hi,

Clock setup is done before reaching the main() function, it is possible that something is happening there.

Can you try another board? it is strange because it is the one I use for general development.

Giovanni

[rolanddixon]

Thank you for the reply. It's working today and the only thing that I have changed was a firmware update on the st-link/V2. Excited to try this beast out now. I see there is a second round of STM32F7 chips, this time they have ARM's double precision FPU design. Should be interesting...

[Giovanni]

Yes, and there should be a 400MHz dual core device later this year, they are moving fast.

Giovanni