From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jonathan Lassoff Subject: Re: Hamlib: "ppdev0: claim the port first" Date: Tue, 26 Jul 2005 20:42:38 -0700 Message-ID: <4076450105072620427655487b@mail.gmail.com> References: <40764501050726193096edae3@mail.gmail.com> <200507271513.37262.w.knol@niwa.co.nz> Reply-To: Jonathan Lassoff Mime-Version: 1.0 Content-Transfer-Encoding: 7BIT Return-path: In-Reply-To: <200507271513.37262.w.knol@niwa.co.nz> Content-Disposition: inline Sender: linux-hams-owner@vger.kernel.org List-Id: Content-Type: text/plain; charset="us-ascii" To: w.knol@niwa.co.nz, linux-hams@vger.kernel.org On 26/07/05, Wilbert Knol wrote: > A level converter designed to work with EIA232 ports won't work on a > parallel port. They are different beasts with different voltage > levels and pin-outs. > ... > Hope this helps. > > Wilbert, ZL2BSJ I realized about 10 minutes after sending that message that I made a mistake as to the different device architectures. Is there any crossover between the the parallel port design and the older RS-232 ports? Does the parallel port actually send the same data? The level converter uses the voltage from the DTR and RTS through a 5V regulator to power an IC that converts the TTL voltages to RS-232 levels and vice versa. Anyone have thoughts on the matter? My next plan is to get a USB to DB9 serial converter. Only problem is that I can only find reliable information that says that the one from Radio Shack works with linux, and those cost like 40 bucks USD. I found one on eBay for $5 USD, but I'm not sure if it works. It's a model GWC UC320. Does anyone have any experience with it? Cheers again, Jonathan Lassoff (KG6THI)