QNX Neutrino Technotes

For this release of QNX Neutrino, you'll find the following technotes here:

IP Tunneling (Generic Routing Encapsulation)

Describes how you'd set up and use GRE.

PPPOE and Path MTU Discovery

Describes how to work around a problem with path MTU discovery.

Compression Rules with the Flash Filesystem

Describes the “do's and dont's” of getting compressed data onto flash.

Making Multiple Images

Explains how to use mkifs to create more than one image.

QNX Neutrino and QNX4 bootloader partitions

Explains problems associated with using a QNX Neutrino bootloader partition to boot a QNX4 partition.

Migrating to the new flash filesystem

Describes how to migrate to the new flash filesystem.

Managing POSIX Message Queues

Describes how to manage POSIX message queues.

Choosing the Correct MTD Routine for the Flash Filesystem

Choose the correct MTD routine.

Asynchronous Messaging

How to use asynchronous messaging.

Asynchronous messaging is an experimental feature; for information about the use of experimental software, see the Commercial Software License Agreement (CSLA) or Partner Software License Agreement (PSLA) in the Licensing area of our website, http://www.qnx.com/legal/licensing/.

Reading a Kernel Dump

How to interpret the output if your application causes a kernel fault.

What Time Is It?

Functions to use to determine the time.

I2C (Inter-Integrated Circuit) Framework

Describes how to create and use an I2C driver.

SPI (Serial Peripheral Interface) Framework

Describes the API for the SPI interface.

Fine-tuning your network drivers

How to tune your network drivers for increased performance or reduced memory footprint.

Migrating to QNX Neutrino for ARMv6 Processor Based Boards

Describes the migration procedure to QNX Neutrino for ARMv6 processor based boards.

Supporting Vector Floating Point Functionality for ARM Processors

Describes the vector floating point functionality for ARM processors.

How to create a Runtime Kit from the QNX Software Development Platform

How to generate a QNX Neutrino runtime system CD.

Backtraces

How to get a backtrace of calling functions.

Freescale E500 SPE

How to get support for using Freescale E500 SPE.

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:

Notes point out something important or useful.

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

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.

Navigation buttons

At the top and bottom of our HTML docs, you'll see some or all of these buttons:

Use this button:	To move:
	To the previous part of the document.
	“Up” in the document: In a prose book, this typically takes you to About This Guide. In a reference book, it takes you to the listing of items that start with a given letter. For example, if you're looking at the docs for abs(), this button takes you to the listing of the functions that start with `A`.
	To the keyword index.
	To the next part of the document.

Technical support

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