Very simple USB 1.1 PHY. Includes all the goodies: serial/parallel
conversion, bit stuffing/unstuffing, NRZI encoding decoding. Uses a
simplified UTMI interface. Currently doesn t do any error checking in
the RX section [should probably check for bit unstuffing errors].
otherwise complete and fully functional.
There is currently no test bench available. This core is very simple
and is proven in hardware. I see no point of writing a test bench at
this time.
The major functionality added in this release includes:
- Rootless mode in X11
- Widget Templtes [both compiled and XML]
As always, this isn t meant to be a stable release, it is only provided so
people can more easily experiment with PicoGUI and possibly help in its
development.
Some of the more significant known bugs:
- The PicoGUI laucher may not work right now, it s undergoing some change.
- Several of the apps included here are not finished, not started, or
otherwise broken.
- There is a redrawing bug that may cause flickering on some platforms
Playfair Cipher
1.not even the large number of keys in a monoalphabetic cipher provides security
2.one approach to improving security was to encrypt multiple letters
3.the Playfair Cipher is an example
4.invented by Charles Wheatstone in 1854,but named after his friend Baron Playfair
Playfair Key Matrix
1.a 5X5 matrix of letters based on a keyword
2.fill in letters of keyword (sans duplicates)
3.fill rest of matrix with other letters
Encrypting and Decrypting
-plaintext is encrypted two letters at a time
1. if a pair is a repeated letter, insert filler like X’
2. if both letters fall in the same row, replace each with letter to right (wrapping back to start from end)
3. if both letters fall in the same column, replace each with the letter below it (again wrapping to top from
bottom)
4. otherwise each letter is replaced by the letter in the same row and in the column of the other letter of the pair
HIDTHIS SPECIFICATION IS PROVIDED “AS IS” WITH NO WARRANTIES
WHATSOEVER INCLUDING ANY WARRANTY OF MERCHANTABILITY,
FITNESS FOR ANY PARTICULAR PURPOSE, OR ANY WARRANTY
otherwise ARISING OUT OF ANY PROPOSAL, SPECIFICATION, OR
SAMPLE.
Electronics Design Checklist
C) 2003 Hank Wallace
This is a checklist for electronics designers. The idea is for engineers and technicians to
share experiences and create a detailed checklist, which the individual designer can pare down to meet his or her specific needs. There are many details that go into the making
of a first-run design success, and this checklist helps prevent Murphy s gremlins from
marring an otherwise healthy design.
QuickSteps books are recipe books for computer users. They answer the
question 揌ow do I...??by providing a quick set of steps to accomplish the
most common tasks with a particular program. The sets of steps are the
central focus of the book. Sidebar QuickSteps provide information on how to
do quickly many small functions or tasks that are in support of the primary
functions. Sidebar QuickFacts supply information that you need to know about
a subject. Notes, Tips, and Cautions augment the steps, but they are presented
in a separate column to not interrupt the fl ow. Brief introductions are present,
but there is minimal narrative otherwise. Many illustrations and fi gures, a
number with callouts, are also included where they support the steps.
QualNet
Sensor Networks
Library
QualNet’s new Sensor Networks Library is a much
awaited feature set that supports the IEEE 802.15.4
standard, otherwise known as Zigbee. Zigbee
networks are Wireless Personal Area Networks
(WPANs) that are defi ned by a low data rate,
long battery life, and secure networking. Zigbee
networks support automation and remote control
This article discusses some issues that a typical Windows C++ programmer will encounter when approaching
Symbian OS for the first time. Our experience in developing for three successive versions of Symbian OS has
given us considerable perspective on what can be difficult when working in this otherwise rich and stable
environment. While one reason for Symbian s success may be the desire of many mobile phone manufacturers not
to be tied to Microsoft, the other reason is that Symbian has put together a lightweight, elegant system that
succeeds in providing a very impressive range of functionality. Here are some pointers to help ease the transition to
successful Symbian OS application development.
A java application - processing which can be downloaded free from processing.org
Here it uses a free library - OpenCV - made by intel. .. to convert all the pixels in an image - in fact in a movie - a capture from the webcam. If the color of a pixel is "higher" comparing to a threshold it turns black - otherwise it becomes white.
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