Re: USB "null modem" cables and related Linux driver questions
- Date: Thu, 07 Jun 2018 08:07:15 +0100
- From: Tixy <tixy@xxxxxxxxxx>
- Subject: Re: USB "null modem" cables and related Linux driver questions
On Wed, 2018-06-06 at 22:26 -0600, Joe Pfeiffer wrote:
> Richard Owlett <rowlett@xxxxxxxxxxx> writes:
> > I have two computers with USB ports.
> > I wish them to communicate as simply as mid-20th-century computers
> > did.
> > Then we used RS232-C with a null modem &/or appropriate software
> > software at both ends.
> > The underlying problem is that both ends egotistically expect to be
> > *MASTER*.
> > The hardware problem is solvable
> > [e.g. http://www.ftdichip.com/Products/Cables/USBtoUSB.htm].
> Given how FTDI does things, I'd be really surprised if this didn't
> your desires. Have you actually tried it? Are you sure there is no
> driver in the kernel?
There is a driver in Linux because, from what the datasheet says, that
cable is two of FTDIs standard USB-to-serial chips wired together. I.e.
it's equivalent to getting 2 USB to serial cables and connecting them
with a null modem cable.