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Re: [avr-gcc-list] BootLoader

From: Graham Davies
Subject: Re: [avr-gcc-list] BootLoader
Date: Fri, 10 Dec 2004 16:07:13 -0500

"Trampas" wrote:

> I was looking to write a boot loader for an ATmega8535, has anyone done it
> before or have some example code?

By "boot loader", you mean Flash loader, right?  You want to be able to load
a program into Flash when you take some special action, not every time the
MCU comes out of reset.

Why not work from Atmel's application note 109?  (Actually, Atmel call it a
boot loader too.)  Or, do you need something that is independent of a
particular host-side application?  If you can't use AVR Prog and want, for
example, to pass in the program as an Intel Hex file using a terminal
emulator I think it will be quite a difficult project.  You can't program
individual words in Flash.  You have to gather together a page and program
it all at once.  If you can't control the order in which the contents of
Flash arrive at your Flash loader, this can get difficult to manage.

This question might be better put to another list or discussion group.
Maybe AVR-Chat on Yahoo!


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