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

[jeffrey traer bernstein]

Yeah i did it that way, and tried inline asm but no deal.
Here's the weird thing: then i tried it a little differently and just 
put my bootloader code in the .bootloader section and moved that to 
0x3800 and the put a little LED blinking program in the main. now if the 
bootloader jumps to the app and runs the blinking app i orginally 
programmed BUT when i put a new program in the flash with bootloader the 
bootloader does not exit and the PC just keeps looping in the bootloader 
for some reason.
it seems like maybe there is something in the application section that 
the bootloader needs or something that is getting overwritten when i 
program. any ideas?


Joerg Wunsch wrote:

> jeffrey traer bernstein <address@hidden> wrote:
>
>  
>
> > Problem is when i try to jump to 0x0000 using a function pointer or
> > inline assembly the app code i loaded doesn't seem to start.
> >    
>
> How do you jump to 0, did you make sure it actually resulted in what
> you want?
>
> Here's the AppNote AVR109 way (that is proven to work):
>
> void (*funcptr)( void ) = 0x0000;
> ....
> funcptr();
>
> If you need a genuine reset (which will also return all IO registers
> to their default state), rather use the watchdog.
>
>