[avr-gcc-list] Re: [Re: Allocating variables to a fixed address]

[David Brown]

Robert von Knobloch wrote:

> This solution, while a purer 'C' solution would require me to have all
> my 'internal' functions with similar call/return requirements.
> This is not, and cannot be, the case. I fear that the magig 'array of
> function pointers' has only limited use and is unsuitable here.
> But many thanks for your thoughts, every comment here makes me re-think
> the problem, which is good.
>
> Cheers,
>
> Robert

You can get around this with some ugly typecasts (hidden in macros), 
casting your functions to (*void)(void) when initialising the array, and 
casting back to appropriate signatures before calling the functions. 
The result will be the same since casting the function signature is not 
going to affect the value of the function pointer.