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Topic: Serial communications

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	Serial communications - Wikipedia, the free encyclopedia
		In telecommunications and computer science, serial communications is the process of sending data one bit at one time, sequentially, over a communications channel or computer bus.
		Serial communications is used for all long-haul communications and most computer networks, where the cost of cable and synchronization difficulties make parallel communications impractical.
		Serial computer busses are becoming more common as improved technology enables them to transfer data at higher speeds.
	en.wikipedia.org /wiki/Serial_communications (985 words)

	Serial Encyclopedia Article, Definition, History, Biography (Site not responding. Last check: 2007-11-07)
		Serial is a term, originating in literature, for a format by which a story is told in contiguous installments in sequential issues of a single periodical publication.
		Serials were especially popular with children, and for many youths in the first half of the 20th century, a typical Saturday at the movies included a chapter of at least one serial, along with cartoons, newsreels, and two feature films.
		As the serials were bought sight-unseen by the lesser theaters for an audience of children, their product often had the worst acting and scripts, the least capable direction, and the most monotonous music ever screened: worse than any film that got reviewed in print.
	encyclopedia.localcolorart.com /encyclopedia/Serial (2835 words)

	Introduction to RS232 Serial Communications
		The serial port on your PC is a full-duplex device meaning that it can send and receive data at the same time.
		Some serial devices use DTR and DSR as signals to simply confirm that a device is connected and is turned on.
		Serial ports use both 9 and 25 pins, many devices can be configured as either DTE or DCE, and - as in the case of many data collection devices - may use completely non-standard or proprietary pin-outs.
	www.taltech.com /TALtech_web/resources/intro-sc.html (2595 words)

	Programming:Serial Data Communications - Wikibooks
		Serial data communications is the foundation for most forms of data communications used with modern computing devices.
		This series of articles is intended for people who are interested in diving into the "guts" of serial data communications systems.
		This series is written toward the x86 platform of CPUs, but much of this information can be applied to other environments including custom embedded systems or other CPU systems.
	en.wikibooks.org /wiki/Programming:Serial_Data_Communications (549 words)

	The PC Technology Guide
		It accepts serial binary pulses from a device, modulates some property (amplitude, frequency, or phase) of an analogue signal in order to send the signal in an analogue medium, and performs the opposite process, enabling the analogue information to arrive as digital pulses at the computer or device on the other side of connection.
		PCs have always provided the means to communicate with the outside world - via a serial communications port - but up until the 1990s, it was a facility that was little used.
		The ability to access bulletin boards and to communicate via fax did attract some domestic users, but in general a modem was considered as a luxury item that could be justified only by business users.
	www.pctechguide.com /17scomms.htm (231 words)

	Serial communications - Encyclopedia.WorldSearch (Site not responding. Last check: 2007-11-07)
		The communications links across which computers, or parts of computers, talk to one another, may be either serial or parallel.
		A parallel link transmits several streams of data (perhaps representing particular bits of a stream of bytes) along multiple channels (wires, printed circuit tracks, optical fibres,...); a serial link transmits a single stream of data.
		Serial Communications: A C ++ Developer's Guide : A Comprehensive Guide to Writing Serial Communications Applications Using Object-Oriented Techniqu
	encyclopedia.worldsearch.com /serial_communications.htm (282 words)

	Interfacing The Serial / RS-232 Port
		The serial port transmits a '1' as -3 to -25 volts and a '0' as +3 to +25 volts where as a parallel port transmits a '0' as 0v and a '1' as 5v.
		Serial Ports come in two "sizes", There are the D-Type 25 pin connector and the D-Type 9 pin connector both of which are male on the back of the PC, thus you will require a female connector on your device.
		If you are serious about pursuing the 16550 UART used in your PC further, then would suggest downloading a copy of the PC16550D data sheet from National Semiconductors Site.
	www.beyondlogic.org /serial/serial.htm (4765 words)

	DataOutfitters Serial Basic RS232 Programming Language (Site not responding. Last check: 2007-11-07)
		Serial Basic is a language designed to allow engineers and developers to talk to rs232 devices without having to spend thousands of dollars on a custom software communications program.
		The version of Serial Basic that will be installed on your computer has customized menu items for a Control Chips CY550 based step motor controller, but Serial Basic should work with any standard serial controlled hardware and it is very easy for you to customize Serial Basic for your needs.
		Consulting services are available at a reasonable rate and most of the time Serial Basic can be configured to meet your serial communication needs at a fraction of the cost of a custom application.
	www.dataoutfitters.com /SerialBasic/SerialBasic.htm (352 words)

	An introduction to serial communications (EasyPrint)
		Communications is the name of the game -- without some way to get data in and out, computers are useless.
		So to send serial data, you need to set the UART to the configuration you'd like (number of bits per character, parity or not, baud rate, and any other specifics to that hardware), then pump data to it to be sent and read received data from it.
		The Serial port pin-out (Palm device serial connector) for the signals on each pin on the back of the Palm device is available at http://www.palm.com/devzone/hdk/images/signals.gif.
	www.palmpower.com /issuesprint/issue199812/serial.html (1724 words)

	visual basic vb C# serial communications: rs232, rs422, rs485 training tutorials example source code
		Serial communications has lost a lot of importance over the last five to ten years.
		Check computer's setup to see that the serial port is enabled and what COM port (1, 2, 3, 4,...) it is configured for (hint: COM1 is address 3F8 hex and IRQ4, COM2 is address 2F8 hex and IRQ3, COM3 is address 3E8 hex and IRQ4, and COM4 is address 2E8 hex and IRQ3).
		It takes a little time and testing to relate specific communications strings to functions but once that is complete, it is easy to duplicate the commands and messages in VB or C#.
	www.htservices.com /Tools/VBandC/SerialCommunications.htm (4099 words)

	Serial Communications Support
		With current modem baud rates limited only by the communications guidleline of just under 56 kbs, direct serial communications now are capable in certain cases of 512 kbs.
		RJ-45s are not typically found on computers or normal serial equipment, but, because they are so small, they are often used on devices that have a lot of ports very close together.
		When a serial device is attached to the system and turned on, Unix, Xenix, Linux, and most other operating systems with roots and foundations in the 60s and 70s, expect the DCD signal (data carrier detect) to be asserted.
	www.csgnetwork.com /serial.html (1096 words)

	RS232 Tutorial on Data Interface and cables
		RS-232 is simple, universal, well understood and supported but it has some serious shortcomings as a data interface.
		In synchronous communication, this confusion is particularly acute, because more signals are involved.
		As the baud rate and line length increase, the effect of capacitance between the different lines introduces serious crosstalk (this especially true on synchronous data - because of the clock lines) until a point is reached where the data itself is unreadable.
	www.arcelect.com /rs232.htm (2828 words)

	Introduction to RS232 Serial Communications, What is rs 232, What is RS232
		Introduction to RS232 Serial Communications, What is rs 232, What is RS232
		The requirement to send these additional two bits cause asynchronous communications to be slightly slower than synchronous however it has the advantage that the processor does not have to deal with the additional idle characters.
		Thus, when the line switches from a value of 1 to a value of 0, the receiver is alerted that a data character is about to come down the line.
	www.taltech.com /resources/intro-sc.html (2627 words)

	Java Communications API
		The Java Communications API can be used to write platform-independent communications applications for technologies such as voice mail, fax, smart cards, embedded systems, and point-of-sale equipment.
		Two versions of the Java Communications API implementations -- 3.0 for Solaris/SPARC, and 2.0 for Windows -- are available for download.
		Java communications API, initially released in 1997, prior to the Java Community Process, was 'grandfathered in' to the JCP (http://www.jcp.org) without having an associated JSR (Java Specification Request).
	java.sun.com /products/javacomm (267 words)

	Serial Programming Guide for POSIX Operating Systems
		This chapter introduces serial communications, RS-232 and other standards that are used on most computers as well as how to access a serial port from a C program.
		In asynchronous mode the serial data line stays in the mark (1) state until a character is transmitted.
		A standard telephone MODEM converts serial data into tones that can be passed over the phone lines; because of the speed and complexity of the conversion these tones sound more like loud screeching if you listen to them.
	www.easysw.com /~mike/serial/serial.html (8463 words)

	SCI - a Whatis.com definition - see also: serial communications interface (Site not responding. Last check: 2007-11-07)
		A serial communications interface (SCI) is a device that enables the serial (one bit at a time) exchange of data between a microprocessor and peripherals such as printers, external drives, scanners, or mice.
		In this respect, it is similar to a serial peripheral interface (SPI).
		In addition, serial interface cables can be longer than parallel interface cables, because there is much less interaction (crosstalk) among the conductors in the cable.
	whatis.techtarget.com /definition/0,,sid9_gci962055,00.html (270 words)

	Serial & Ethernet communications tools, protocol analyzers And hardware
		With a quarter century of expert experience in serial programming, Greenleaf has the knowledge and products that can chop hundreds of hours off your development time.
		You're here because you have questions about or need help with programming an application that involves serial communications---or need a tool to help solve a problem about serial data or protocol.
		Greenleaf has serial data and protocol analyzers that let you see anomalies that are otherwise invisible.
	www.greenleafsoft.com (445 words)

	What is serial port? - A Word Definition From the Webopedia Computer Dictionary (Site not responding. Last check: 2007-11-07)
		A port, or interface, that can be used for serial communication, in which only 1 bit is transmitted at a time.
		A serial port is a general-purpose interface that can be used for almost any type of device, including modems, mice, and printers (although most printers are connected to a parallel port).
		This article, from August 1996, describes serial ports, introduces the most general and least expensive ISDN equipment, and provides an outline of the steps to exploit this new service.
	www.webopedia.com /TERM/D/serial_port.html (322 words)

	Serial Links using RS-232 and RS-485
		I2CChip.com's BL232 is an IC that converts between asynchronous serial and I2C.
		Serial Basic is a programming language designed for RS-232 communications.
		Serial Innovations has an RS-232 line analyzer and an ActiveX comm plug in.
	www.lvr.com /serport.htm (1600 words)

	Serial Communications
		The two serial ports of a Macintosh are mini-Din-8 connectors which are labeled with a telephone (the "modem port") and a printer ("printer port").
		Communications driver chips are built very ruggedly and will stand an amazing amount of mistreatment for a short period of time.
		"In the preferred hardware implementation of LocalTalk, a Zilog 8530 Serial Communications Controller (SCC) is used." [1] The classic Macs and the Mac SE [3] both use the 8530 SCC, a 26LS30 differential transmitter, a 26LS32 differential receiver, and a fistfull of RFI filters.
	www.rdrop.com /~cary/html/serialportdocs.html (15123 words)

	LonMark: Solutions (Site not responding. Last check: 2007-11-07)
		Advanced communications protocols and converging serial trainline standards are expected to pay big dividends in terms of lower operating costs and more efficient train operation.
		In the absence of an advanced serial trainline communication protocol and uniform standards, an "Electronic Tower of Babel" has developed which can be very difficult, if not impossible, for a car builder to sort out.
		Fundamental communications between car consists is achieved through the use of identical "E-1" communications channels provided by Telephonics.
	www.lonmark.org /solution/trans/arevolut.htm (2059 words)

	GPS Serial Communications
		The photo shows a Garmin eMap, a common handheld GPS unit, that comes with a serial cable allowing you to interface it with a PC.
		A handheld GPS receiver that has a serial interface allows message strings to be viewed with a PC terminal program like Hyperterminal.
		This tutorial was not meant to describe GPS in detail, but rather share how to serially interface a GPS for one's own hardware interests.
	www.boondog.com /tutorials/gps/gps.html (1287 words)

	Amazon.com: Books: Visual Basic Programmer's Guide to Serial Communications (Site not responding. Last check: 2007-11-07)
		For Visual Basic programmers working with serial ports, if you are not an expert at them, then you need this book.
		Since I already had a great deal of experience with serial ports, most of this was not new to me. However, instead of having to train some colleagues on all the details, I recommended they buy this book.
		I am using it to write a communications program to interface with field devices using the modbus protocol.
	www.amazon.com /exec/obidos/tg/detail/-/1890422258?v=glance (1217 words)

	Asynchronous Serial Communications
		This is the best modem and serial communications FAQ that I have found.
		Serproxy is a multi-threaded proxy program for redirecting network socket connections to/from serial links, in cases where the remote end of the serial link doesn't have a TCP/IP stack (eg an embedded or microcontroller system).
		The proxy allows other hosts on the network to communicate with the system on the remote end of the serial link.
	www.mindspring.com /~krwatson/serial.html (187 words)

	embedded.startpagina.be - Communication protocols, Operating Systems, Software development, Java, Research projects, ...
		Serial communications The website has a technical library on RS-232, RS-485, RS-422, Industrial ethernet, USB, convertors,...
		SystemC Community SystemC provides hardware-oriented constructs within the context of C++ as a class library implemented in standard C++.
		CETIC CETIC is the Centre of Excellence in Information and Communication Technologies, focusing on applied research and technology transfer in the field of software engineering and electronic systems.
	embedded.startpagina.be (2213 words)

	Connect Tech Inc., multiport serial communications for PCI, PC/104, PC/104-Plus, CompactPCI, USB, Ethernet and ISA ...
		Connect Tech Inc., multiport serial communications for PCI, PC/104, PC/104-Plus, CompactPCI, USB, Ethernet and ISA systems.
		We design and manufacture high performance multi-port serial adapters for PCI, Universal PCI, PC/104, PC/104-Plus, CompactPCI and ISA bus compatible computers, along with USB-to-serial and Ethernet-to-serial devices.
		We pride ourselves on our global reputation for delivering quality, cost-effective multi-port serial cards and serial devices.
	www.connecttech.com (200 words)

	Serial Communications - Product Information (Site not responding. Last check: 2007-11-07)
		Serial networks provide a very low-cost solution for data transfer and data collection applications where speed and distance requirements are small.
		GE Fanuc products support the Series 90 Protocol (SNP), Remote Terminal Unit (RTU), and ASCII data transfers at this level to interface PLCs with a variety of third-party devices.
		- Protocol used for Series One, Series Three, Series Five, Series 90-30, Series 90-70, and Series Six PLCs.
	www.geindustrial.com /cwc/products?pnlid=2&id=comnetser97 (166 words)

	Device Server, Serial Server, Rs422 Communications Port, Serial Device Server, Serial Devices (Site not responding. Last check: 2007-11-07)
		JetStream8500 is an integrated, multi-purpose solution for serial applications, offering high port density for larger remote sites (16, 24, 32 or 48 ports).
		The JetStream4000 is a compact 8 port terminal/access server, designed for applications demanding the support of multiple serial devices and a common parallel port printer.
		It is designed for use in environments that require the support of serial devices for transaction processing and/or data capture, together with Ethernet attached devices such as PCs.
	www.perle.com /products/prod_family/serial_servers (404 words)

	Serial Communications
		There is the Centronics or parallel port, normally used for the printer; and the RS-232 or serial port, normally used for communications.
		The word serial means that data is being transferred one bit after another, down a single wire (in parallel mode, data is transferred one word at a time, through eight wires in parallel).
		You can use a parallel port for communications, but this is not usual.
	www.sharpmz.org /sercomm01.htm (539 words)

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