[Yhc] Adding Custom Primitive functions

[Tom Shackell]

Alexis Morris wrote:
> Hi all,
> 
> I have a number of driver related function calls that I would like to 
> add as Primitive functions to yhc and yhi. For yhi 
> (yhc\src\runtime\BCKernel) I have added definitions to Runtime.c and 
> WrapPrimitive.c, in order to define and wrap stuff like  "void 
> display_string(void)" where the function is declared in a 
> display.h/display.c file  (this code controls the LCD display of the NXT).
> 
> So far I think I have this yhi part covered. My question is about where 
> these primitives are made known to the compiler so I can make 
> display_string visible to yhc programs. After adding this line to 
> Primitive.hs yhc hangs...
> 
> ----------------------------------------------------------------------------------------------------
> -- NXT Display
> ---------------------------------------------------------------------------------------------------- 
> 
> foreign import fastccall display_string :: CString -> IO ()

Oh it really shouldn't hang! just adding the function to Primitive.hs 
should be enough. Send me the whole file and I'll have a go at compiling 
it myself, see if I can make anything of it :-)

Cheers


Tom