[En-Nut-Discussion] ARM in Thumb mode

Harald Kipp harald.kipp at egnite.de
Sun Jan 11 11:04:20 CET 2009

Adam Dybkowski wrote:

> I didn't find any 
> definitions in Nut/OS makefiles that differentiate ARM/Thumb required 
> compiler modes - that's why I asked about it.

Although planned initially (that's why it's compiled with interwork),
nothing had been done so far in the official distribution.

> Bernard Walter, please write what you had to change in Nut/OS sources to 
> compile most of files in Thumb, but some of them in ARM mode. To save 
> Flash space, I have to compile my application in Thumb mode as well as 
> Nut/OS core, drivers etc.

Moreover, the code would execute much faster when running from 16-bit
external Flash like the one used on Ethernut 3.


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