RTEMS 4.9.2 On-Line Library

Console Driver Termios

BSP and Device Driver Development Guide

8.2: Termios

Termios is a standard for terminal management, included in the POSIX 1003.1b standard. As part of the POSIX and Open Group Single UNIX Specification, is commonly provided on UNIX implementations. The Open Group has the termios portion of the POSIX standard online at http://opengroup.org/onlinepubs/007908775/xbd/termios.html. The requirements for the <termios.h> file are also provided and are at http://opengroup.org/onlinepubs/007908775/xsh/termios.h.html.

Having RTEMS support for Termios is beneficial because:

from the user's side because it provides standard primitive operations to access the terminal and change configuration settings. These operations are the same under Unix and Rtems.
from the BSP developer's side because it frees the developer from dealing with buffer states and mutual exclusions on them. Early RTEMS console device drivers also did their own special character processing.
it is part of an internationally recognized standard.
it makes porting code from other environments easier.

Termios support includes:

raw and console handling,
blocking or non-blocking characters receive, with or without Timeout.

At this time, RTEMS documentation does not include a thorough discussion of the Termios functionality. For more information on Termios, type man termios on a Unix box or point a web browser at .

BSP and Device Driver Development Guide