Olimex Support Forum

ARM => ST => Topic started by: dvd_video on June 04, 2013, 12:09:53 PM

Title: STM32-E407 FPU
Post by: dvd_video on June 04, 2013, 12:09:53 PM
Hi all,

Does anybody know how can i make board's FPU to run?
Any answer will me helpful!

Thanks!
Title: Re: STM32-E407 FPU
Post by: BJFreeman on June 04, 2013, 01:02:43 PM
http://www.st.com/st-web-ui/static/active/en/resource/technical/document/application_note/DM00047230.pdf
Using floating-point unit (FPU)
you also might look into the DSP library
Title: Re: STM32-E407 FPU
Post by: dvd_video on June 04, 2013, 01:43:00 PM
Already seen it, explains benefits of the FPU, though never seen a example code or init it ...
In OpenODS Eclipse trough ARM-USB-TINY-H i declare variable as float as i see here, so + - * / should work, weeell no since i got error for making those arithmetic operations "undefined reference to `__aeabi_f2uiz'"
while compiling.

Any ideas ?