Date: Sun, 4 Sep 2005 16:13:02 +1000 From: "Murray Taylor" <MTaylor@bytecraft.com.au> To: "Bill Moran" <wmoran@potentialtech.com>, <questions@freebsd.org> Subject: RE: USB-RS232 adapter in FreeBSD 5? Message-ID: <04E232FDCD9FBE43857F7066CAD3C0F10539C5@svmailmel.bytecraft.internal>
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----=3daabc3b-d1cf-425b-842f-5e6e9bfb4adf Content-Type: text/plain Content-Transfer-Encoding: 7bit --------------------------------------------------------------- The information transmitted in this e-mail is for the exclusive use of the intended addressee and may contain confidential and/or privileged material. Any review, re-transmission, dissemination or other use of it, or the taking of any action in reliance upon this information by persons and/or entities other than the intended recipient is prohibited. If you received this in error, please inform the sender and/or addressee immediately and delete the material. E-mails may not be secure, may contain computer viruses and may be corrupted in transmission. Please carefully check this e-mail (and any attachment) accordingly. No warranties are given and no liability is accepted for any loss or damage caused by such matters. --------------------------------------------------------------- ***This Email has been scanned for Viruses by MailMarshal.*** ----=3daabc3b-d1cf-425b-842f-5e6e9bfb4adf Content-class: urn:content-classes:message Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable =20 -----Original Message----- From: owner-freebsd-questions@freebsd.org [mailto:owner-freebsd-questions@freebsd.org] On Behalf Of Bill Moran Sent: Sunday, September 04, 2005 9:43 AM To: questions@freebsd.org Subject: USB-RS232 adapter in FreeBSD 5? I've got a USB -> RS232 adapter I'm trying to get working on 5.3-RELEASE. I've seen a lot of comments about these kind of things that seem to indicate that they can be used (I occasionally have needs to use this lappy as a serial console, and I'd like to use it to demonstrate a serial barcode scanner that we have - normally, tip would work great for this, but the laptop doesn't have a native RS-232 port). Anyway, I get the impression that I'm missing some early, basic steps to get this working. dmesg shows: ugen0: Prolific Technology Inc. USB-Serial Controller, rev 1.10/3.00, addr 2 But neither tip nor cu seems to talk to ugen0 very well. Other posts I've seen seem to indicate that I need to be talking to a ucom0 device, but I see nothing like that in /dev. Is there something missing from my kernel? I haven't been able to find any reference to ucom in the GENERIC or NOTES files. Any advice/pointers is welcome. TIA. --=20 Bill Moran Potential Technologies http://www.potentialtech.com Be advised -- usb->serial adapters in general can have problems with real world devices that need serial port control lines as the usb dongles do not support them at all. As 'replacements' for a real serial port, they are a dismal failure, unless you are talking to a device that _only_ uses TxD, Rxd and Gnd. I have had to try these toys on newer laptops (sans serial ports!) to communicate with PLC's etc and they do not work.=20 This is not an O/S dependancy, the dongle and the USB protocol do not=20 support the hardware handshake lines. mjt --=20 A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing on usenet and in e-mail? Murray Taylor Bytecraft Systems E: mtaylor@bytecraft.com.au ----=3daabc3b-d1cf-425b-842f-5e6e9bfb4adf--
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