Re: USB to Serial converter code pl2303

[Johan Hovold <jhovold@gmail.com>]

On Wed, Feb 19, 2014 at 05:44:20PM +0100, Magnus wrote:
> >[ Please make sure to CC the linux-usb list as well. ]
> Sure Johan.

[ And please try to avoid top-posting... ]

> The brand of this USB-Serial converter is sold by or as
> "Plexgear" or "Marquant".
> 
> Absolutely no info on the adapter is provided in the package
> other then a mini-cd saying its a "prolific" product.
> 
> I tried to send initialization code "117" followed by
> servo movement codes to it via gtkterm.
> The only time the adapter responded was at 115200 Baud.
> 
> I need an adapter that can handle 2400 Baud to talk to the
> ft639/ede639 servo controller chip or possibly a pl2303 driver
> that is improved.

The pl2303-driver can handle 2400 baud, but not sure exactly what baud
rates are available for a cloned/pirated pl2303 chip (if that is what
you've got). 115200 baud should be supported, though.

> I have looked at vscom, a very similar
> looking adapter on all counts except shape.
> This adapter uses a linux driver called "ftdi_sio"
> from info i have read on the net.

That driver also works at 2400 baud.

> What im really looking for here is an usb to serial
> adapter that works for 2400 Baud and not only 115200.
> I guess ill have to buy a new one from somewhere, but im
> missing the what and the where :)

I only suggested using 115200 baud as a way to verify your setup. Once
you do that you can try 2400.

Good luck,
Johan