Hansson <hansson@no.spam> wrote in news:Y_6dnT7k-
bxFCljZnZ2dnUVZ_tWdnZ2d@comcast.com:

> 1)
> The SAM-BA code sits in ROM. When it initializes it copies itself
> to RAM and runs from there.
> 
> 2)
> In Application Programming is supported. However, the WHOLE flash
> becomes unavailable while you erase (this is just the nature of the
> flash architecture) even if you are just erasing a single block,
> so you need to make sure any code you want to run during flash erase
> is in RAM. That includes any ISR's that may be needed.

Hansson,

thank you very much for the information.

Herbert

Herbert Demmel wrote:
> Hi everybody,
> 
> I have 2 questions regarding AT91SAM7S64:
> 
> (1) Bootloader
> is the BL in some ROM-area or is it located in FLASH like in Atmel AVR 
> controllers?
> 
> (2) Selfprogramming of flash
> is it possible to re-program (part of) the FLASH while some other part 
> of the program is still running (something like continous readout of 
> port pins with communication to a host)?
> 
> Thanks in advance, Herbert

1)
The SAM-BA code sits in ROM. When it initializes it copies itself
to RAM and runs from there.

2)
In Application Programming is supported. However, the WHOLE flash
becomes unavailable while you erase (this is just the nature of the
flash architecture) even if you are just erasing a single block,
so you need to make sure any code you want to run during flash erase
is in RAM. That includes any ISR's that may be needed.

</A>

Hi everybody,

I have 2 questions regarding AT91SAM7S64:

(1) Bootloader
is the BL in some ROM-area or is it located in FLASH like in Atmel AVR 
controllers?

(2) Selfprogramming of flash
is it possible to re-program (part of) the FLASH while some other part 
of the program is still running (something like continous readout of 
port pins with communication to a host)?

Thanks in advance, Herbert