USB to RS-232 adapters

From: Marko Mäkelä (
Date: 2006-07-18 22:00:30

On Tue, Jul 18, 2006 at 06:33:22PM +0200, Rainer Buchty wrote:
> >Speaking of EPROM programmers and erasers; I have a bit of money that
> >need to be used up and I looked into how much a modern programmer and
> >eraser costs.. Programmers starting at $320-390, erasers at $160.
> >Sheesh, maybe I don't really have that kind of need, or I'm looking
> >at the wrong places (ELFA in this case).

Isn't ELFA the last place to look from?  They are expensive and (in Finland)
have very poor customer service.

> Build this one:
> Supports everything "we" need and is even OS-independent as it is 
> entirely controlled through RS232.

On a related note, if you are unlucky enough to miss an RS-232 connector
on your computer, it seems that Prolific PL2303 based USB to RS-232 adapters
are a safe bet.  While XON/XOFF handshaking will not work on Linux,
CTS/RTS will work.  Some time ago, I made some experiments with a borrowed
PL2303 adapter, and was able to patch c2nload (adding some delays or
tweaking the system calls) so that it would work on both Debian GNU/Linux
(kernel 2.6.16.x or so) and Windows XP.  On one occasion, my FTDI FT232BM
based adapter (FTDI US232B) worked on Windows XP, but I think it was an
accident.  The ftdi_sio driver on Linux is broken beyond repair.


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