[En-Nut-Discussion] Problems using global variables and/or floating point numbers on Nut/Os (using ethernut 5)

Harald Kipp harald.kipp at egnite.de
Sat May 19 11:56:29 CEST 2012

Hi Vegard,

On 19.05.2012 10:27, Vegard Aaker wrote:
> I am using Ethernut 5 board and nut/os version 4.10.
> Do anyone have another os config file for the ethernut 5 board which
> utilize the floating point unit on the processor? Even better would be if
> anyone has both a code example and a config file I could try :)

There is no FPU on the SAM9XE, all floating point operations are done in software by the C library, newlib in your case. Using floats on embedded systems is not a good idea unless you have an FPU attached.  I'm rarely using them, but I'll try your test case. In the meantime this page will provide additional information:




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