Re: [avr-libc-dev] functions to write data into application flash section

[Thomas Richter]

Hi Joerg,

the problem is following:
In my working application I get data from an interface (e.g. UART) and I 
will write it into the Flash. This is necessary for changing the 
application during a software update.

I will divide the application flash section into 3 parts where I have 3 
different applications. The boot loading process shall decide which part 
shall be used.

I use the ATmega128.

Regards,
Thomas

Joerg Wunsch schrieb:
> As Thomas Richter wrote:
>
> > In the question there was an error but you understand it
> > correctly. I would ask for the functions in <avr/boot.h>. I am not
> > sure that these functions also useable for application flash
> > section.
>
> Depends on what you actually mean by this.  If you're asking for
> something that could be run from *within* the application section,
> this is impossible with the AVR (except for a few ATtinys): *only* the
> bootloader area (as designated by the respective fuse bits) is allowed
> to write to flash.
>
> If you're asking for something that can *update* the application flash
> section: that's it.