Lpc2000

When have you sent it ? To which email address ?
I think i haven't received an email about this topic...

Regards,

        Martin

PS: I will merge this change in and release it to my website.

----- Original Message ----- 
From: "Alex Holden" <alex@...>
To: <lpc2000@yahoogroups.com>
Sent: Tuesday, July 06, 2004 9:06 AM
Subject: Re: [lpc2000] Re: loading hex-es....(Tricky Situation)


> Robert Adsett wrote:
> > At 09:57 PM 7/5/04 +0000, you wrote:
> >>That'll be risky business indeed. Luckily, the built-in IAP flash
> >>programmer can program anywhere except the bootloader sector. I think
> >>if you corrupt reset table the mcu will be totally useless on
> >>reset...not even the bootloader will run.
> > I don't believe the OP is talking about rewriting the bootload sector
just
> > the interrupt vector table (which is at the beginning of the flash
rather
> > than the end).  If I were trying that I'd just erase the first sector
> > (sector/segment/paragraph whatever they call it). That should be
relatively
> > safe.  The chip would then act as if it were new.  Whether that's better
> > than bringing out P0.14 for toggling is a different question.
>
> Exactly. If the vector table at the beginning of user flash doesn't
> checksum correctly, the chip goes into bootloader mode after reset and
> you can reprogram it over the serial port even if P0.14 is permanently
> tied high. As you say erasing the first sector is probably the easiest
> way of corrupting the vector table.
>
> BTW on a (sort of) related note, the current version of lpc21isp doesn't
> work on big endian systems like Macs because it calculates the vector
> block checksum incorrectly causing the device to always enter the
> bootloader on reset. I wrote a patch which fixes this and sent it to the
> author but haven't got any response. There's a copy here:
> http://www.alexholden.net/misc/lpc21isp-byte_safety.patch
>
> -- 
> ------------ Alex Holden - http://www.linuxhacker.org ------------
> If it doesn't work, you're not hitting it with a big enough hammer
>
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