Re: [slang-users] Anyone got a serial i/o module?

[jmrobert5@xxxxxxxxx]

Hi,

Linux primarily, maybe win32 if it will work there.

What we want to do is send simulated GPS NMEA text messages out the serial port.
No modem, just ascii on the line.

So it looks like the termios is most of it.

Thanks!
 
--
Joe Robertson
Yamaha YZF600R Thundercat
http://home.mchsi.com/~jmrobert5/


> jmrobert5@xxxxxxxxx <jmrobert5@xxxxxxxxx> wrote:
> >Does anyone have a general serial I/O module for Slang?
> 
> How general do you want it and for what OS?  In the past, I have
> manipulated a modem attached to a serial port using the termios and
> select modules.  For a while I was using the modem's caller ID ability
> to map incoming numbers to musical tunes allowing me to identify the
> caller by the tune that was played.
> 
> >I have a project where we (at first) want to write text out a serial port in a
> >certain pattern.  I figure what better way than a slang script?
> 
> The termios module (for Unix/POSIX) should work for setting up the
> serial port.  I noticed that it was lacking functions for manipulating
> the baud-rate so I added those tonight and checked the changes into
> the svn repository.
> 
> The basic idea is that you would open the serial port using, e.g.,
> 
>     fd = open ("/dev/ttyS0", O_RDWR|O_NONBLOCK);
> 
> and then use the termios module to set it up.  For the modem, I used:
> 
>    tty = tcgetattr (fd);
>    termios_set_cflag (tty, CRTSCTS|CLOCAL|CREAD | termios_get_cflag (tty));
>    termios_set_lflag (tty, 0);
>    termios_set_oflag (tty, 0);
>    termios_set_iflag (tty, IGNBRK|ICRNL);
>    () = tcsetattr (fd, TCSANOW, tty);
> 
> Once you have it set up, use the read/write functions to interact with
> it.
> 
> I can send you my caller-id script if you want more information.
> 
> Thanks,
> --John

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