Re: [avrdude-dev] avrdude only downloads once, once.

[Bernard Fouché]

Kevin wrote:

> I'm running avrdude on a Mac OSX 10.4.1 system with the IOGear GUC232A 
> (Prolific) USB/serial dongle.  I'm using the 1.0.8 driver from IOGear 
> and it seems to work to download to my M8535 board.  BUT, the device 
> does not respond error occurs on all subsequent downloads.  If I 
> unplug the dongle and plug it back in, then again, I can get one 
> download to work, then again, that error.  I'm using the latest 
> non-beta version of avrdude.
>
> Is there a button to push or a knob to twist to get this annoying 
> symptom to go away?
>
> thanks,
> DLC

I dunno Mac OSX but being used to unix, it looks like a file descriptor 
closing problem (and avrdude does not check if a device is already being 
used before opening it). Can you connect this USB/serial dongle to 
anything that produces rs232 traffic (a terminal, another computer with 
a cross over cable). If so, use a terminal emulator to talk to this 
other device and see if, like with avrdude, you are not able to have the 
terminal emulator work twice.

If you have the same problem, then you should report it to IOGear.

   Bernard