RE: [Fwd: RE: [avr-chat] BOOTLOADER on ATMega644]

[Weddington, Eric]

> -----Original Message-----
> From: address@hidden 
> [mailto:address@hidden
>  On Behalf Of Robert von Knobloch
> Sent: Monday, December 22, 2008 7:04 AM
> To: address@hidden
> Subject: [Fwd: RE: [avr-chat] BOOTLOADER on ATMega644]
> 
> I assume you are saying that there is no support for 
> un-initialised variables in flash ?
> 

That is correct. The compiler does not know about any named variables in the 
flash address space. This is because you have to use accessor functions 
(bootloader code to write, special macros/functions to read) to get to the 
data, and these accessor functions use the physical address, not a named 
variable.