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External References Baud Rate Maximum Distance (in feet) Maximum Distance (in meters) 2400 3000 914.4 4800 1000 304.8 9600 500 152.4 19200 50 15.24 The distance limitation can be mitigated. There are "short haul modems" that can extend this distance to several miles of cable. There are also telephone lines, or conventional modems, and other long-distance communications techniques. There are other ways to handle data in situations like this, and those signals can be converted to simple RS-232 data formats that a typical home computer can interpret. Distance still can be a limiting factor for communication, although when you are talking about distances like to Saturn for the Cassini mission, serial data communication has other issues involved than just data loss due to cable length. And yes, NASA/ESA is using serial data communication for transmitting those stunning images back to Earth. 2.8 External References w:Serial cable 17 • RS-232 wiring standards explained 18 • RS-232 connection types explained 19 • Wikipedia article on RS-232 20 • RS-232 standards explained by HW-Server 21 • Serial Pinouts (D25 and D9 Connectors) 22 (also has more technical information about the UARTs used in PCs) • RS232 Connections, and wiring up serial device 23 has several diagrams, including one showing how to let one PC monitor the serial communication between 2 other RS232 devices. • Lammert Bies, RS232 Specifications and standard 24 Includes technical specs on RS-232 signals and more detailed information about parity checking. • Tronisoft's Printable ASCII Serial Port Crib Sheets 25 • jSSC library (Java Simple Serial Connector). Work under Win32 and Win64 26 17 http://en.wikipedia.org/wiki/Serial%20cable 18 http://www.camiresearch.com/Data_Com_Basics/RS232_standard.html 19 http://www.arcelect.com/rs232.htm 20 http://en.wikipedia.org/wiki/RS-232C 21 http://hw-server.com/rs232-overview-rs232-standard 22 http://www.beyondlogic.org/serial/serial.htm#2 23 http://airborn.com.au/serial/rs232.html 24 http://www.lammertbies.nl/comm/info/RS-232_specs.html 25 http://www.tronisoft.com/rs232info/ASCII_serial_port_crib_sheets.pdf 26 http://code.google.com/p/java-simple-serial-connector/ 25
RS-232 Connections 2.9 Other Serial Programming Articles Typical RS232-Hardware Configuration 27 Category:Serial Programming 28 27 http://en.wikibooks.org/wiki/Serial%20Programming%3ATypical%20RS232-Hardware% 20Configuration 28 http://en.wikibooks.org/wiki/Category%3ASerial%20Programming 26
Page 1 and 2: Serial Programming Wikibooks.org
Page 3 and 4: Contents 1 Introduction and OSI Mod
Page 6 and 7: 1 Introduction and OSI Model 1.1 In
Page 8 and 9: Software Examples • Serial Networ
Page 10 and 11: 2 RS-232 Connections 2.1 Introducti
Page 12 and 13: Data Terminal/Communications Equipm
Page 14 and 15: Data Terminal/Communications Equipm
Page 16 and 17: Connection Types Figure 1 Female DB
Page 18 and 19: Connection Types Figure 5 mini-ster
Page 20 and 21: Wiring Pins Explained One thing to
Page 22 and 23: Baud Rates Explained 2.4.9 RI (Ring
Page 24 and 25: Baud Rates Explained 2.5.1 Modems E
Page 26 and 27: Signal Bits 2.6.3 Parity Bit To hel
Page 30 and 31: 3 8250 UART Programming 3.1 Introdu
Page 32 and 33: 8086 I/O ports char test; test = 25
Page 34 and 35: x86 Processor Interrupts 3.3.2 Inte
Page 36 and 37: 8259 PIC (Programmable Interrupt Co
Page 38 and 39: Serial COM Port Memory and I/O Allo
Page 40 and 41: UART Registers UART Registers Base
Page 42 and 43: UART Registers Divisor Latch Byte V
Page 44 and 45: UART Registers The Received Data in
Page 46 and 47: UART Registers When you are writing
Page 48 and 49: UART Registers these to a logical "
Page 50 and 51: UART Registers Each bit the data po
Page 52 and 53: UART Registers Line Status Register
Page 54 and 55: UART Registers Bits 7 and 6 are dir
Page 56 and 57: External References Read the value
Page 58 and 59: 4 Serial DOS 4.1 Introduction It is
Page 60 and 61: Finding the Port I/O Address for th
Page 62 and 63: Making modifications to UART Regist
Page 64 and 65: Basic Serial Input 4.5.1 Polling th
Page 66 and 67: Interrupt Drivers in DOS 4.6 Interr
Page 68 and 69: Interrupt Drivers in DOS able to us
Page 70 and 71: Interrupt Drivers in DOS Interrupt
Page 72 and 73: Terminal Program Revisited Port[Com
Page 74 and 75: Terminal Program Revisited RBR = 0;
Page 76: Terminal Program Revisited build a
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Serial Linux Classic Unix systems o
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Serial Linux 1. Terminals/teletypes
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Serial Linux for more information t
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Serial Linux signal and trap that s
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Serial Linux 5.2.6 uucp Overview Uu
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6 Serial Java 6.1 Using Java for Se
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Using Java for Serial Communication
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JavaComm API 6.2.2 Download & Insta
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JavaComm API wantedPortName); Syste
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JavaComm API 6.2.4 Simple Data Tran
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JavaComm API Before going into deta
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JavaComm API // makes sense to enab
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JavaComm API /** * Clear the buffer
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JavaComm API } } start = i; } retur
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RxTx Like with any other particular
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See also • SerialIO has a free tr
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Forming Data Packets • The footer
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Forming Data Packets bitrate or raw
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8 Error Correction Methods 8.1 Intr
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ACK-NAK A 1-bit sequence number (al
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combination If it sends a message b
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9 Appendex A:Modems and AT Commands
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Introduction forms the base for pro
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Introduction can still also be used
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Modem Programming Basics • By loo
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Modem Programming Basics Whatever i
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Modem Programming Basics 9.2.5 Char
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Changing State 9.4 Changing State 9
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AT Commands with the exception of #
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Result Codes Description: Result
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10 Contributors Edits User 10 Adrig
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List of Figures • GFDL: Gnu Free
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List of Figures 1 GFDL 2 User Mike1
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from that copyright holder, and you
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