Implementing 802. 11 with Microcontrollers : Wireless Networking for Embedded Systems Designers

by Eady

• ISBN13: 9780750678650
• ISBN10: 0750678658
• Edition: CD
• Format: Paperback
• Copyright: 2005-09-02
• Publisher: Elsevier Science

Summary

Wireless networking is poised to have a massive impact on communications, and the 802.11 standard is to wireless networking what Ethernet is to wired networking. There are already over 50 million devices using the dominant IEEE 802.11 (essentially wireless Ethernet) standard, with astronomical growth predicted over the next 10 years. New applications are emerging every day, with wireless capability being embedded in everything from electric meters to hospital patient tracking systems to security devices. This practical reference guides readers through the wireless technology forest, giving them the knowledge, the hardware and the software necessary to design a wireless embedded device rapidly, inexpensively, and effectively. Using off-the-shelf microcontrollers from Microchip and Atmel, the author provides step-by-step instructions for designing the hardware and firmware for a fully operational wireless networking device. The book gives a thorough introduction to 802.11 technology and puts it into perspective against the other wireless standard options. Just enough theory and mathematics is provided to give the depth of understanding needed for practical design work. The book thoroughly covers: * Laptop wireless Ethernet card introduction and theory *Introduction to CompactFlash-to-microcontroller interfacing * Implementing the laptop wireless Ethernet card in an embedded environment In addition, the book includes a CDROM containing all of the code, schematics and programs necessary to implement embedded 802.11 wireless networking. * Covers the hottest new embedded market area- wireless networking * Shows designers how to save money and time by using microcontrollers in their embedded wireless designs instead of expensive, complex prefab boards * CD-ROM accompanying book contains all the code, schematics and programs necessary to get started now!

Table of Contents

Preface	ix
What's on the CD-ROM?	x
Why Are We Doing This?	1	(8)
Selecting a Suitable Microcontroller	2	(1)
Selecting a Suitable 802.11b Communications Device	3	(1)
802.11b Hardware Overview	3	(1)
AirDrop Basics	4	(5)
The AirDrop-P	9	(8)
The AirDrop-P Hardware	9	(6)
Learn to Play Guitar and Become Famous	15	(2)
The AirDrop-A	17	(8)
The AirDrop-A Hardware	17	(6)
Bowing Out	23	(2)
802.11b CompactFlash Network Interface Cards	25	(12)
They Were Not Designed To Do This	25	(1)
The TEW-222CF	25	(1)
Never Ignore an Inquisitive Author with Hand Tools	26	(4)
Unwrapping the TEW-222CF	30	(2)
An Undercover Look at the Zonet ZCF1100	32	(2)
What's Behind Door Number 4	34	(1)
RF, Witchcraft, Pointy Hats, Ghouls, Goblins...Same Thing	35	(2)
Talking With 802.11bCompactFlash NICs	37	(8)
Physically Connecting a Microcontroller to a CompactFlash Card	38	(5)
Musical Overtones	43	(2)
Touring the Card Information Structure	45	(34)
Talking in Tuples	46	(2)
First Steps with the AirDrop-P	48	(2)
Walking the Tuple Chain	50	(9)
CIS Reconnaissance	59	(6)
Dumping Linksys WCF12 Tuples	65	(3)
Dumping Netgear MA701 Tuples	68	(2)
Dumping Zonet ZCF100 Tuples	70	(4)
Enabling the 802.11b CompactFlash NIC	74	(3)
The Value of Parsing the CIS	77	(1)
Full Throttle	77	(2)
Learning to Talk to 802.11b CompactFlash NICs	79	(14)
What the 802.11b NIC Does for Us	79	(4)
The 802.11b CompactFlash NIC I/O Drivers	83	(10)
Setting Up An AirDrop Wireless Network	93	(12)
Setting Up the AP	94	(1)
Something's in the Air	95	(9)
Guitars and Hollywood	104	(1)
AirDrop Driver Basics	105	(32)
BAP	105	(1)
FID	106	(1)
RID	107	(11)
Reading a RID	118	(7)
Stringing Up the SSID	125	(3)
Good RIDdance	128	(2)
Retrieving the MAC Address	130	(4)
Status Check	134	(3)
Putting an AirDrop on a Wireless LAN	137	(30)
Bogie Number 1 -- Allocating Transmit Buffers	137	(10)
Bogie Number 2 -- Enabling the MAC	147	(11)
Authenticating the AirDrop Wireless LAN Station	158	(2)
Associating with the AIRDROP_NETWORK AP	160	(7)
Processing 802.11b Frames with the AirDrop	167	(42)
AirDrop Frame Structure	168	(16)
AirDrop-P Frame Reception	184	(25)
PINGING the AirDrop	209	(34)
Examining the IP Header	231	(12)
Flying Cargo with UDP and the AirDrop	243	(32)
Running a UDP Application on the AirDrop-P	243	(2)
The EDTP Internet Test Panel and the Code Behind It	245	(4)
Exercising the AirDrop-P with the EDTP Internet Test Panel	249	(25)
Notes	274	(1)
Flying Cargo with TCP/IP and the AirDrop	275	(60)
TCP and the AirDrop-P	275	(9)
The TCP/IP Stack's Physical Layer	284	(1)
The TCP/IP Stack's Data Link Layer	284	(1)
The TCP/IP Stack's Network Layer	284	(1)
The TCP/IP Stack's Transport Layer	284	(1)
The TCP/IP Stack's Application Layer	285	(1)
TCP/IP -- The Big Ugly	285	(49)
You've Done It!	334	(1)
WEP and the AirDrop	335	(26)
Incorporating WEP into the AirDrop 802.11b Driver	335	(10)
The New Experimental AirDrop Hardware	345	(1)
An Experimental AVR AirDrop Variant	345	(3)
The Experimental AirDrop Firmware	348	(7)
Coding a Simple 802.11b Web Server	355	(3)
The AirDrop SRAM	358	(3)
A New Kid in Town Who Calls Himself ZigBee	361	(10)
Zig What???	361	(2)
Making ZigBee Talk	363	(3)
The Microchip ZigBee Stack	366	(5)
Parting Frames	371	(2)
Numeric Notation	373	(1)
Source Code Presentation	373	(1)
Conventions	373	(4)
Sub Snippets	374	(1)
Netasyst Sniffer Capture Text Presentation	375	(1)
Mini Sniffs	375	(2)
Index	377