AVR-Chat

Does anyone have source code for Avr Bootloader?
I saw its protocol and tried to write it with codevisionavr, but still 
have some problems,I can't exactly find out what it mean by "X-
ON/X_OFF Handshaking" in its protocol.

On Fri, 22 Jul 2005 06:01:14 -0000 you wrote:

>Does anyone have source code for Avr Bootloader?
>I saw its protocol and tried to write it with codevisionavr, but still 
>have some problems,I can't exactly find out what it mean by "X-
>ON/X_OFF Handshaking" in its protocol.

I put up a bootloader in CVAVR on
http://www.cmeter.org/CVmegaload/index.html

I'm not familiar with the one you mention.

--
Ralph Hilton
http://www.ralphhilton.org
C-Meter: http://www.cmeter.org
FZAOINT http://www.fzaoint.net

At 01:01 AM 7/22/2005, Amir Rahafrooz wrote:
>Does anyone have source code for Avr Bootloader?
>I saw its protocol and tried to write it with codevisionavr, but still
>have some problems,I can't exactly find out what it mean by "X-
>ON/X_OFF Handshaking" in its protocol.

Xon/Xoff is a method of handshaking that uses two chars (xon) and 
(xoff) to pace the flow of data.
When the recipient wants the sender to stop, it sends (xoff) to the 
sender. When it wants the sender to start sending again, it sends (xon).
Obviously the data stream can't contain the chars (xon) or (xoff) 
because it would be interpreted as handshaking.

Pull up an ascii chart to see the definitions of all the special 
chars defined in the ascii char set.

--- In AVR-Chat@yahoogroups.com, Ralph Hilton <ralph@r...> wrote:
> On Fri, 22 Jul 2005 06:01:14 -0000 you wrote:
> 
> >Does anyone have source code for Avr Bootloader?
> >I saw its protocol and tried to write it with codevisionavr, but 
still 
> >have some problems,I can't exactly find out what it mean by "X-
> >ON/X_OFF Handshaking" in its protocol.
> 
> I put up a bootloader in CVAVR on
> http://www.cmeter.org/CVmegaload/index.html
> 
> I'm not familiar with the one you mention.
> 
> --
> Ralph Hilton
> http://www.ralphhilton.org
> C-Meter: http://www.cmeter.org
> FZAOINT http://www.fzaoint.net

thanks about cvmegaload,I have worked with it before.it's so easy to 
work,but Avr Bootloader has much different options and looks more 
general.
you can download this software here:
http://www.ipstack.co.kr/bbs/zboard.php?id=links&no=49