About the Character DDK

This chapter includes:

What you'll find in this guide

The following table may help you find information quickly:

For information about: See this chapter:
The character I/O system Character I/O Architecture
The 8250 serial driver 8250 serial driver
Functions and data structures provided by the io-char library Character I/O Library


To use this guide, you need to have:

Building DDKs

The Character DDK package can be downloaded from Foundry27.

The latest source code can also be downloaded at Foundry27:BSPs and Drivers Source code .

Note: This part of Foundry27 is now deprecated and is no longer being developed.

You can compile the DDK from the IDE or the command line.

Typographical conventions

Throughout this manual, we use certain typographical conventions to distinguish technical terms. In general, the conventions we use conform to those found in IEEE POSIX publications. The following table summarizes our conventions:

Reference Example
Code examples if( stream == NULL )
Command options -lR
Commands make
Environment variables PATH
File and pathnames /dev/null
Function names exit()
Keyboard chords Ctrl-Alt-Delete
Keyboard input something you type
Keyboard keys Enter
Program output login:
Programming constants NULL
Programming data types unsigned short
Programming literals 0xFF, "message string"
Variable names stdin
User-interface components Cancel

We use an arrow (→) in directions for accessing menu items, like this:

You'll find the Other... menu item under Perspective-->Show View.

We use notes, cautions, and warnings to highlight important messages:

Note: Notes point out something important or useful.

Caution: Cautions tell you about commands or procedures that may have unwanted or undesirable side effects.

WARNING: Warnings tell you about commands or procedures that could be dangerous to your files, your hardware, or even yourself.

Note to Windows users

In our documentation, we use a forward slash (/) as a delimiter in all pathnames, including those pointing to Windows files.

We also generally follow POSIX/UNIX filesystem conventions.

Technical support

To obtain technical support for any QNX product, visit the Support area on our website (www.qnx.com). You'll find a wide range of support options, including community forums.

Copyright © 2002–2018, QNX Software Systems Limited, a subsidiary of BlackBerry Limited. All rights reserved.