Embedded Systems Design - May 2011 (True PDF).pdf

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VOLUME 24,
NUMBER 4
MAY 2011
EMBEDDED SYSTEMS DESIGN
safety-critical
C coding
16
Unleash your
inner CPU, 28
Cracking
unreadable code
with style, 34
The Official Publication of The Embedded Systems Conferences and Embedded.com
Secrets of
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Introducing ZYNQ, the new element in processing.
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© Copyright 2011. Xilinx, Inc. XILINX, the Xilinx logo, Zynq, and other designated brands included herein are trademarks of Xilinx in the United States and other countries. All other trademarks are the property of their respective owners.
ARM is the registered trademark of ARM Limited in the EU and other countries. Cortex is the trademark of ARM Limited in the EU and other countries.
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The INTEGRITY RTOS
®
Certified and Deployed Technology
The INTEGRITY RTOS is deployed and certified to:
Railway: EN 50128 SWSIL 4 , certified: 2010
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Medical: FDA Class III , approved: 2007
Industrial: IEC 61508 SIL 3 , certified: 2006
Avionics: DO-178B Level A , certified: 2002
www.ghs.com
Copyright © 2011 Green Hills Software, Inc. Green Hills, the Green Hills logo and INTEGRITY are trademarks of Green Hills Software, Inc. in the U.S.and/or
internationally. All other trademarks are the property of their respective owners.
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THE OFFICIAL PUBLICATION OF THE EMBEDDED SYSTEMS CONFERENCES AND EMBEDDED.COM
EMBEDDED SYSTEMS DESIGN
COLUMNS
programming
pointers 11
Insights into member
initialization
BY DAN SAKS
Often when it seems that C++ is
generating bigger, slower code than C,
it may be that C++ is just distributing
generated code differently.
break points 46
A rumble, a wave, and
iPads dry up
BY JACK G. GANSSLE
The disaster in Japan makes you think
about the fundamental chemistry
behind all our modern smart devices.
VOLUME 24, NUMBER 4
MAY 2011
16
Cover Feature:
Seventeen steps to safer C code
BY THOMAS HONOLD
Here are 17 tips for writing safety-critical C code
using methods adapted from C++ and Ada.
DEPARTMENTS
#include 5
Languages and customs
BY RON WILSON
The multilingual culture of
embedded programming was
replaced by a stultifying sameness.
But from the ruins, a retrograde
movement has begun to stir.
parity bit 7
28
Why your embedded controller may not need
a CPU
BY MARK AINSWORTH
Mark Ainsworth of Cypress Semiconductor explains how you can
free up your CPU by making smart peripheral devices from a
combination of programmable logic devices and datapaths.
IN PERSON
ESC Silicon Valley — May 2–5, 2011
http://esc-sv.techinsightsevents.com/
ESC Brazil— May 24–25, 2011
www.escbrazil.com.br/
ESC Chicago— June 6–8, 2011
http://esc-chicago.techinsightsevents.com/
ESC India— July 20–22, 2011
www.esc-india.com/
ESC Boston— September 26–29, 2011
http://esc-boston.techinsightsevents.com/
34
Adopting C programming conventions
BY JEAN J. LABROSSE
Gone is the Wild West era of programming. Today production
programmers have to follow the house style guide to get the job
done efficiently. This article from the author’s Embedded Systems
Conference course shows you some civilizing techniques.
EMBEDDED SYSTEMS DESIGN (ISSN 1558-2493) print; (ISSN 1558-2507 PDF-electronic) is published 10 times a year as follows: Jan/Feb, March, April, May, June,
July/August, Sept., Oct., Nov., Dec. by the EE Times Group, 600 Harrison Street, 5th floor, San Francisco, CA 94107, (415) 947-6000. Please direct advertising and editorial
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tomer service, telephone toll-free (847) 559-7597. Please allow four to six weeks for change of address to take effect. Periodicals postage paid at San Francisco, CA and additional
mailing offices. EMBEDDED SYSTEMS DESIGN is a registered trademark owned by the parent company, EE Times Group. All material published in EMBEDDED SYSTEMS
DESIGN is copyright © 2010 by EE Times Group. All rights reserved. Reproduction of material appearing in EMBEDDED SYSTEMS DESIGN is forbidden without permission.
ONLINE
www.embedded.com
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