[ale] Configure serial port settings at boot

Chris Fowler cfowler at outpostsentinel.com
Sat Dec 6 19:08:20 EST 2014


----- Original Message -----

> From: "Alex Carver" <agcarver+ale at acarver.net>
> To: "Atlanta Linux Enthusiasts" <ale at ale.org>
> Sent: Saturday, December 6, 2014 5:17:56 PM
> Subject: Re: [ale] Configure serial port settings at boot

> Ok, thanks to Jim, JD and Chris, rc.local appears to be the way to go
> and is relatively easy.

> I'm not using a script. This is for lpd with a label printer attached
> to the serial port so technically the port is always in use. The
> problem is that a cooked mode serial port will eat some of the bitmap
> data and cause much confusion for the printer when its bitmap suddenly
> vanishes. Eight bit raw mode is all the printer needs to make sure the
> labels print properly. I can't configure the port within lpd other than
> the baud rate so I have to change the mode externally with stty.

You may want hardware flow control. I've been down this road many times, but it was back in the 90s. 
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