From mboxrd@z Thu Jan 1 00:00:00 1970 From: Adam Sampson Subject: Re: USB converters and old hardware (Baycom in particular) Date: Thu, 15 Apr 2010 21:05:37 +0100 Message-ID: References: <201004081508.45770.phillor@telstra.com> <20100413135239.89243vh5ioxdtks0@mgtmail.com> <201004151151.38923.phillor@telstra.com> <20100415104942.63522s5vbiv7a7i8@mgtmail.com> <4BC75156.9060907@radagast.org> Mime-Version: 1.0 Return-path: Sender: linux-hams-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-hams@vger.kernel.org Dave Platt writes: > I'm not sure how this is being done... but it may not be possible at > all in a USB dongle! You might be pleasantly surprised. The FTDI USB-to-serial chips have a bit-banging mode that's designed for doing this sort of thing, where you can tell it to just clock a sequence of bits out to the pins (or read one in) at a fixed rate. It'd need some software fiddling, of course, and if you're going to that much effort I'd be tempted just to stick a microcontroller in the way to give the modem a more convenient serial or USB interface... -- Adam Sampson