gnupic: Re: [gnupic] PIC-based PIC programmer?
Subject:
RE: [gnupic] PIC-based PIC programmer?
From:
Peter Onion ####@####.####
Date:
7 Jul 2005 10:39:33 +0100
Message-Id: <1120729145.17437.22.camel@ratbert.alien.bt.co.uk>
On Thu, 2005-07-07 at 17:29 +0800, Chen Xiao Fan wrote:
>
> The bootloader is a good idea. However I think it is very
> difficult. Unfortunately the bootloader that I know requires
> different firmware for different oscillating frequencies.
I assume you are using a "bit bang" serial interface ? In which case
you could recalibrate it after a reset. Get the PC to send a known
character string and measure the bit times and you can then work out the
delays to get the baudrate right.
Peter
