[En-Nut-Discussion] eboot - bootloader under 4k

[Thiago A. Corrêa]

Hi,

Unfortunally I don't have the hardware to test it out, but I could
apply the patches and make the commit if it is reported to work and no
one disagree with it :P

Althought I suppose the jumper thing might have to be removed in order
to keep the appload behavior consistent with other users hardware. Or
we could devise some configuration method for appload/eboot. A
config.h comes to mind *smile*

Regards,
   Thiago A. Correa

On 5/3/07, David Armstrong <david6.armstrong6 at ntlworld.com> wrote:
> i would certianly be interested Bernard ,
>
> Regards
> Dave
>
> ----- Original Message -----
> From: "Bernard Fouché" <bernard.fouche at kuantic.com>
> To: "Ethernut User Chat (English)" <en-nut-discussion at egnite.de>
> Sent: Thursday, May 03, 2007 10:24 AM
> Subject: Re: [En-Nut-Discussion] eboot - bootloader under 4k
>
>
> FYI a while back I did change appload. Now I have a version that:
>
> - fits under 4k (4068 bytes with gcc 3.4.5 and avr-libc 1.4.5)
> - has a .bss segment and a .data segment as usual apps (however .data is
> unused at the moment)
> - flash only modified pages from a boot to another, sparing flash write
> cycles when rebooting often. If you reboot and get the same file, no
> flashing is done.
> - read jumpers on port F to select if network info from EEPROM is to be
> read before booting and to select if network bootloading is to be done.
> That allows you to bootload once and then keep your current application
> if it has to be used in a place you can't bootload.
> - be able to read and flash a usual binary file or use files that have
> CRC's prefixed at the beginning of the file thanks to an external C
> tool. ('addcrc'). This is to be sure that you flash a correct file (not
> relying on UDP checksums)
> - be aware of gateway issues (you can TFTP from a remote site if your
> firewall correctly manages TFTP)
>
> I sent this to Harald a long time ago but I guess he did not get enough
> time to have a look. I just had a look recently, adding the jumper thing
> and sparing a few more bytes. If someone is interested, I can post it
> there and if these modifications are considered usefull, one may include
> them in NutOs.
>
>  Bernard
>
> Thiago A. Corrêa wrote:
> > Hi guys,
> >
> >    Ever since last year
> > (http://www.egnite.de/pipermail/en-nut-discussion/2005-May/004446.html)
> > eboot wasn't compiling under somewhat recent gcc versions. Today I
> > gave it a try to optimize a bit of the space based on the code from
> > appload. The only problem is that my SP Duo died. I don't know when I
> > will have one again since its currently sold out at Embedded
> > creations.
> >
> >   So, anyway, if someone could check it out it would be great. I have
> > attached a patch based on current CVS then I can commit it if it's
> > reported to work.
> >
> >    There are still other places where the same optimizations can be
> > applied further reducing the size.
> >
> > Regards,
> >     Thiago A. Correa
> > _______________________________________________
> > http://lists.egnite.de/mailman/listinfo/en-nut-discussion
> >
> >
>
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