[CentOS] RS-485 over a half duplex serial in Centos 6.5
John R Pierce
pierce at hogranch.com
Sat Nov 8 21:49:09 UTC 2014
On 11/8/2014 1:36 PM, Jason Ricles wrote:
> Hi, I am trying to make a program in C to communicate with a temperature
> sensor over my serial port that uses RS-485 and is a half duplex. I am
> however having trouble getting the device into RS-485 mode, is it possible
> to use RS-485 mode in Centos 6.5 or does it only support RS-232 mode?
standard legacy PC serial ports are strictly RS232C. RS485 is a 120
ohm balanced line specification. What host-side serial port are you
using that has RS485 support?
re: linux support, I found this:
http://retis.sssup.it/~scordino/code/rs485.html which suggests '485
support is pretty thin in Linux.
--
john r pierce 37N 122W
somewhere on the middle of the left coast
More information about the CentOS
mailing list