gnupic: love this bootloader (for pic16f/18f)
Subject:
Re: love this bootloader (for pic16f/18f)
From:
Chris Emerson ####@####.####
Date:
19 Jan 2005 08:23:38 +0000
Message-Id: <20050119082332.GA10836@ixion.tartarus.org>
On Wed, Jan 19, 2005 at 06:14:50PM +1300, David McNab wrote:
[Tiny bootloader]
> I got around the limitation by hacking up a command-line python prog to
> replace it (which I can share if people want - note that it's 18fxx2-only).
That's weird - I'm literally in the middle of writing a command-line
python program to use it. :-)
> I do recommend Tiny PIC Bootloader to anyone who uses bootloaders. Why
> put up with larger footprints and slower downloads?
There are some disadvantages:
1. You have to temporarily erase the reset vector (with the jump to the
loader) and rewrite it, giving a small window where you can lose
bootloading ability. However, I think most "transparent" loaders would
suffer from that anyway because of the 64 byte erase size.
2. It can erase itself if you get the host program wrong, so it's not
failsafe.
Chris
