linux and rs-485

Do you have a question? Post it now! No Registration Necessary

Translate This Thread From English to

Threaded View
devs Contact options for registered users 's Avatar (by Gravatar) posted on
August 1, 2003, 2:21 am
rate this thread
Reply to this post Reply Tag this thread to save it in your account Save Printer-friendly version of this post Print
hello,

i need to write an application for an arm-linux sbc to interface with
a device over rs-485. it is just point-to-point communication and doesn't
use any of the multipoint communications ability of rs-485.

could anyone pls. tell me where i can find information about linux and
rs-485?

thanks in adavnce,
 Deva Seetharam

Other Related Threads
Russell Shaw Contact options for registered users 's Avatar (by Gravatar) posted on
August 1, 2003, 3:50 am
Permalink
Reply to this post Reply Tag this thread to save it in your account Save Printer-friendly version of this post Print
Re: linux and rs-485
Quoted text here. Click to load it

news:comp.arch.embedded


Other Related Threads
Michael Schnell Contact options for registered users 's Avatar (by Gravatar) posted on
August 1, 2003, 6:46 am
Permalink
Reply to this post Reply Tag this thread to save it in your account Save Printer-friendly version of this post Print
Re: linux and rs-485
Quoted text here. Click to load it

AFAIK, RS-485 is a hardware specification to be used on top of (e.g.)
V-24 (aka asynchronous serial interface). RS-485 can also be used for
synchronous protocols (e.g. HDLC). So I don't understand your question.
Could you rephrase more specific ?

Allan Butler Contact options for registered users 's Avatar (by Gravatar) posted on
August 1, 2003, 5:46 pm
Permalink
Reply to this post Reply Tag this thread to save it in your account Save Printer-friendly version of this post Print
Re: linux and rs-485

Quoted text here. Click to load it

        Use the standard serial protocols that are used on rs-232 ports and
you will do just fine.  The RS-485 standard specifies the hardware that is
used and not the communications protocol.  RS-232 is more susceptible to
noise than RS-485 and RS-485 can be used over greater distances than RS-232.

Quoted text here. Click to load it


Alex Pavloff Contact options for registered users 's Avatar (by Gravatar) posted on
August 1, 2003, 9:51 pm
Permalink
Reply to this post Reply Tag this thread to save it in your account Save Printer-friendly version of this post Print
Re: linux and rs-485

Quoted text here. Click to load it

Get an RS-232 to RS-485 convertor from say, B&B Electronics at
http://www.bb-elec.com /.  Then write code that opens the serial ports
and does serial things like would using RS-232.
--
Alex Pavloff - remove BLAH to email
Software Engineer, Eason Technology

Site Timeline