gnupic: Re: [gnupic] [ANN] Pikme PIC Bootloader (for 16F819 etc)
Subject:
Re: [gnupic] [ANN] Pikme PIC Bootloader (for 16F819 etc)
From:
Robert Pearce ####@####.####
Date:
26 Jul 2006 19:46:37 +0100
Message-Id: <UvrgR$D$tpxEFwT3@jonah.huneausware.local>
On Tue, 25 Jul 2006, Byron A Jeff ####@####.#### wrote :
>On Tue, Jul 25, 2006 at 03:44:36PM +0000, mengjin su wrote:
>> There is an even smaller bootloader, tiny bootloader, at
>>
>> http://www.etc.ugal.ro/cchiculita/software/picbootloader.htm
>>
>> It's less than 100 words!
>>
>> Yes, it uses serial port as the interface for downloading.
>
>Size really isn't the issue. I have an issue with Tiny precisely because
>it does use the USART, which is a valuable resource, for programming.
>
Why is that a problem? If you're using the USART as a serial port in
normal operation then the circuitry is already there. If you're not then
it's not a "valuable resource" to you. On the 16F871 board I have in
front of me, I'm using the USART to communicate with a PC in the end
application, and during development the same PC does "calibration"
monitoring via the same USART, so having it plugged in and available
lets me use the same USART for the boot loader when I build new code.
Similarly with the first 16F871 project I did, where the USART was used
to drive a MIDI interface. When I wanted to update the firmware I did so
by sending it over MIDI.
--
Rob Pearce http://www.bdt-home.demon.co.uk
The contents of this | I'm so broke I can't even pay attention.
message are purely |
my opinion. Don't |
believe a word. |
