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Table of Contents
Task
Manager
Looking
for a Security Blanket,
by Jennifer Huber
Priority
Interrupt
Old
Reliable, by
Steve Ciarcia
New
Product News,
edited by John Gorsky
TTP/A
Protocol and Design
Arvind
Nath Rapaka, Wilfried Elmenreich, and Donald Wunsch
II
TTP/A is a time-triggered
field bus protocol that you can use to establish
real-time communication between transducer nodes.
In this article, Arvind, Wilfried, and Donald show
you how TTP/A works and describe its implementation
on an Atmel AT90S4433. p. 12
Keywords:
TTP/A, networking, field
bus, AT90S4433, time triggered protocol, TDMA, IFS,
architecture
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here for password)
—Feature
Article —
BasicCards
101 (Part 1):
Program Your First Smartcard
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Read
it now!
by Brian Millier
As
opposed to credit cards, which have magnetic
strips that store data, smartcards contain
microcontrollers that store data and run programs.
In this series of articles, Brian introduces
you to smartcard technology and explains how
you can program your own card using the Basic
programming language. p. 22
Keywords:
Smartcard, storage,
BasicCards, programming, development kit,
reader, encryption, BASIC, AVR
Sponsored
by MCS Electronics
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Backpack
Water Level Monitor
Richard
Wotiz
The Backpack Water Level Monitor
measures and monitors the water level in a hiker’s
hydration pack. It’s a great solution for serious
adventurers and novices alike. In this article,
Richard shows you how to build your own system with
a Motorola MC33794 e-field sensor and an MC68HC908QY4
microcontroller. p. 28
Keywords:
Level sensor, MC33794, e-field, MC68HC908, electrode,
power, display
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here for password)
Wireless
Vehicle Tracking (Part 2):
Forth-Based Speech Synthesis
Ken
Merk
Last month, Ken showed you how he designed a GPS-based
wireless vehicle tracking system. Now he’s back
with information on the code that’s required for
speech synthesis. He closes with a detailed description
of how he took the system for a test drive in his
Ford Windstar. p. 38
Keywords:
Tracking, wireless, Forth, text-to-speech, V8600,
Flashlite-V25, CVDM-3, GPS25-LVS, GPs, NMEA, DTMF
(If you have pop-ups disabled click
here for password)
APPLIED
PCs
The UCA93LV Advantage
Implement I2C on Your PC
Fred
Eady
Your new PC doesn’t include an I2C interface?
No problem. Fred has an interesting solution. Follow
along as he explains how some basic code and a Calibre
UCA93LV can bring the power of an I2C
bus to your PC. p. 48
Keywords:
I2C, PC, UCA93LV, USB, FT245BM, C,
Easy Ethernet, Visual Studio.NET, PCF8584
(If you have pop-ups disabled click
here for password)
Software-Only Hardware Simulation
Michael
Melkonian
Simulating embedded hardware in a Windows environment
can significantly reduce development time. In this
article, Michael provides techniques for the software-only
simulation of embedded hardware. He presents a simple
example of an RTOS-less embedded system that uses
memory-mapped I/O to access a UART-like peripheral
to serially poll a slave device. The simulator is
capable of detecting bugs and troublesome design
flaws. p. 58
Keywords:
Simulation,
hardware, Windows, memory-mapped I/O, UART, Visual
C++, UNIX, code structure
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here for password)
The Ultimate Firmware NCO?
Tom
Napier
When you're dealing with a real-time application,
minimizing the instruction count still matters.
Tom shows you how firmware squeezing can lead to
fast sine wave and versatile dual-output oscillators.
p. 68
Keywords:
NCO, numerically controlled oscillator, DAC,
frequency, resolution, PIC16C57, filter, phase
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here for password)
FROM
THE BENCH
Intelligent Current Sensing
Harness the Power of the ACS750 Hall Effect
Current Sensor
Jeff
Bachiochi
Looking for an isolated current sensor? Look no
further. The ACS750 family of current sensors is
an inexpensive solution for designs that require
motor control, load detection, and over-current
fault protection. This month, Jeff shows you how
to use these powerful devices to your advantage.
p. 74
Keywords:
Current sensing, ACS750, Hall effect, magnetic
flux, ADC, PIC12F675
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here for password)
SILICON
UPDATE
Memory Memoir
Tom Cantrell
Remembrance of memory past. Confused? Don’t be.
From the ancient 2102 chips of the ’70s to the more
recent MRAM chips, Tom surveys the storied history
of memory technology. p. 76
Keywords:
Memory,
RAM, DRAM, SDRAM, PSRAM, Burst CellularRAM, magnetic,
MRAM, CY9C62256
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here for password)
Test
Your EQ
Index of Advertisers
PREVIEW
April #165
Robotics
Robot
Upgrade: Use a Microcontroller to Emulate an
I2C EEPROM
Mini Rover 7: Electronic Compassing for Mobile
Robotics
Build a Small Robotics Platform
BasicCards
101 (Part 2): Use a Nitrogen Monitor
ABOVE THE GROUND
PLANE Pennies to Heaven: The Lenz Launcher
APPLIED PCs A
Wireless Ethernet Solution for the People
FROM THE BENCH
USB in Embedded Design (Part 1): The Undeniable
Benefits
SILICON UPDATE Powered
Points
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