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R: [avr-chat] I: need help on avr-libv and winavr


From: Carlo Ossanna
Subject: R: [avr-chat] I: need help on avr-libv and winavr
Date: Mon, 3 May 2010 08:36:26 +0200

Thanks for your kind help.

Carlo Ossanna

-----Messaggio originale-----
Da: Dave Hylands [mailto:address@hidden 
Inviato: sabato 1 maggio 2010 18.16
A: Carlo Ossanna
Cc: address@hidden
Oggetto: Re: [avr-chat] I: need help on avr-libv and winavr

Hi Carlo,

On Thu, Apr 29, 2010 at 11:16 PM, Carlo Ossanna
<address@hidden> wrote:
...snip...
> 7. I need to update the application section (RWW) + (NRWW) excluding the
boot loader section
>
>    (this probably means that the interrupt vector table in the boot
section must be replicated in the high end part of the application (NRWW
section).
>
>    Due to the fact that I can not ch’ange the vector jump table in the
boot section I propably have to have an added interrupt ventor jump teable
>
>    In the application NRWW section at a fixed start address, hose jumps
change depending on the new addresses of the ISRs in the application
section.

Well, you have 2 choices about where the interrupt vector table can
go. Search the datasheet for the IVSEL bit. It allows the ISRs to be
at the beginning  of the bootloader (in case you want an interrupt
driven bootloader), or at the beginnning of the application.

--
Dave Hylands
Shuswap, BC, Canada
http://www.DaveHylands.com/





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