Re: [avr-gcc-list] bootloader not jumping back to app

[Dave Hansen]

From: jeffrey traer bernstein <address@hidden>

[...]
> > void (*funcptr)( void ) = 0x0000;
> > ....
> > funcptr();
>
> okay here's another stab in the dark. when you make a function pointer and 
> initialize it with an address (0x0000 in the case) is it the data i.e. the 
> address stored in the .data section? this would

Yes.  If it wasn't, you'd have to copy the value into RAM before it could be 
used (pgm_read_word).

> mean that when i reprogramming from the bootloader i am overwriting this 
> necessary initialization data and so the jump is not going to the right 
> place and keeping me in the bootloader.

If that's the case, perhaps you can do something like
  funcptr = (void (*)(void)) 0;
  funcptr();

The initialization of funcptr then becomes optional.

Regards,
  -=Dave