Re: [avrdude-dev] baud rate enhancement

[Jan-Hinnerk Reichert]

On Sunday 02 May 2004 15:37, Brian Dean wrote:
> Hi,
>
> I've built a remote device and I want to update its programming
> remotely over a radio link.  I'm using Jason Kyle's stk500boot.c
> bootloader to make the controller on the robot simply appear to be
> an STK500.  On my PC I have one side of the radio modem and the
> other is on the robot.  The problem is that the radio modems won't
> link up at the 115200 bps that is hard-coded for the STK500
> protocol, it needs to run slower.

Where do I get this "stk500boot.c"?

> Would anyone object to the following patch, or have a better
> solution? Basically, all I'm doing is taking a baud rate on the
> command line and using that to override the default baud rate for
> the programmer. Something similar was done for the AVR910
> programmer, so I just extended that code slightly.  In that case,
> one can duplicate a programmer entry and add the 'baudrate'
> parameter to the config file and change it that way as well.

I have made the change for avr910 back then. I haven't changed 
"stk500.c" because I couldn't imagine that someone would need to run 
it at a different baudrate ;-)

So, no objections here.

> With this code, I can just do the following:
>
>       avrdude -p m128 -c stk500 -b 9600 ...
>
> I've attached the patch.  This should allow one to change the baud
> rate without having to change the config file.  I've not updated
> any of the docs, yet.  Note that if the baud rate is specified
> explicitly in the config file, the command-line option will
> override it.

Looks like a candidate for programmer-dependent options ;-)

/Jan-Hinnerk