Date: Tue, 2 Feb 1999 10:27:37 +0300 From: "Igor Sysoev" <igor@nitek.ru> To: <questions@FreeBSD.ORG> Subject: Re: Serial programming Message-ID: <199902020728.KAA09163@gate.nitek.ru>
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> From: Mark Turpin <mturpin@spel.com>
> Subject: Serial programming
> I'm working on a program to communicate with an Amada Punch
> Press. It communicates serial. I looked through the lists and found
> a reference to the Serial Programming Guide for POSIX compliant
> Operating Systems. So using the information I gathered there I've
> opened the serial port like this
>
> fd = open("/dev/ttyd0", O_RDWR | O_NOCTTY | O_NDELAY);
>
> Then when I go to write to the port
>
> n = write(fd, "Hello This is a test", 20);
>
> n ends up being -1. I'm running this as root, I've tried with minicom
> and it works fine.
>
> Any suggestions?
May you should work with /dev/cuaa0 instead ?
As far as I know you will be blocked while opening /dev/ttyd0 until
there will be DCD line active.
With best regards,
Igor Sysoev
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