"larwe" <zwsdotcom@gmail.com> wrote in message news:1142208699.199247.134950@u72g2000cwu.googlegroups.com...

> I use the AVR family a great deal. No bootloader at all in any of my
> AVR products (at the moment) - they are factory-programmed once over
> JTAG or SPI. I'm going to add a bootloader to one of my devices in the
> foreseeable future, but it will not use any kind of encryption, and it
> will be loading the upgrade code off a removable flash media card.

Well, if you have products out there and you want to give users a chance
to upgrade, you need some kind of load and protection mechanism.

-- 
Siol
------------------------------------------------
Rather than a heartless beep
Or a rude error message,
See these simple words: "File not found." 

SioL wrote:

> Is this group frequented by AVR users at all? I find it hard to believe that noone
> uses the DES encrypted bootloader.

I use the AVR family a great deal. No bootloader at all in any of my
AVR products (at the moment) - they are factory-programmed once over
JTAG or SPI. I'm going to add a bootloader to one of my devices in the
foreseeable future, but it will not use any kind of encryption, and it
will be loading the upgrade code off a removable flash media card.

"SioL" <Sio_spam_L@same.net> wrote in message news:rBoQf.797$oj5.294698@news.siol.net...
> I've been using DES bootloader from atmel app note for a while.
>
> The problem is that occasionally my mega8 locks up. It will still accept
> and complete upgrade, but the application will simply not run any more.

Is this group frequented by AVR users at all? I find it hard to believe that noone
uses the DES encrypted bootloader.

-- 
Siol
------------------------------------------------
Rather than a heartless beep
Or a rude error message,
See these simple words: "File not found." 

I've been using DES bootloader from atmel app note for a while.

The problem is that occasionally my mega8 locks up. It will still accept
and complete upgrade, but the application will simply not run any more.

I have to re-program the boot loader to make it work again.

Does anyone have experience with this kind of behaviour?
Someone on avrfreaks hinted that there was a problem and linked to
a non-existing thread.

The fuses are setup so that no LPM/SPM is allowed in the boot
section.

Any clues?

-- 
Siol
------------------------------------------------
Rather than a heartless beep
Or a rude error message,
See these simple words: "File not found."