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Acces I/O products PCI-COM422/4 User Manual

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Acces I/O products PCI-COM422/4 User Manual

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Summary of Contents for Acces I/O products PCI-COM422/4

  • Page 1 Artisan Technology Group is your source for quality new and certified-used/pre-owned equipment SERVICE CENTER REPAIRS WE BUY USED EQUIPMENT • FAST SHIPPING AND DELIVERY Experienced engineers and technicians on staff Sell your excess, underutilized, and idle used equipment at our full-service, in-house repair center We also offer credit for buy-backs and trade-ins •...
  • Page 2 10623 Roselle Street, San Diego, CA 92121 • (858) 550-9559 • FAX (858) 550-7322 contactus@accesio.com • www.accesio.com MODEL PCI-COM422/4 USER MANUAL FILE: MPCICOM422-4.E1d...
  • Page 3 ACCES, nor the rights of others. IBM PC, PC/XT, and PC/AT are registered trademarks of the International Business Machines Corporation. Printed in USA. Copyright 1995, 2005 by ACCES I/O Products Inc, 10623 Roselle Street, San Diego, CA 92121. All rights reserved. WARNING!! ALWAYS CONNECT AND DISCONNECT YOUR FIELD CABLING WITH THE COMPUTER POWER OFF.
  • Page 4 Warranty Prior to shipment, ACCES equipment is thoroughly inspected and tested to applicable specifications. However, should equipment failure occur, ACCES assures its customers that prompt service and support will be available. All equipment originally manufactured by ACCES which is found to be defective will be repaired or replaced subject to the following considerations.

  • Page 5: Table Of Contents

    Table of Contents Chapter 1: Introduction....................5 Figure 1-1: Block Diagram(Only One Serial Channel Shown) ............7 Chapter 2: Installation....................8 Chapter 3: Option Selection ..................10 Figure 3-1: Simplified Termination Schematic................... 10 Figure 3-2: Option Selection Map...................... 12 Chapter 4: Address Selection ..................13 Chapter 5: Programming ....................

  • Page 6: Chapter 1: Introduction

    Chapter 1: Introduction The card was designed for effective transmission in RS422 (EIA422) protocol. The card is 6.1 inches long and may be installed in PCI-bus slots of IBM PC or compatible computers. The card features four independent, asynchronous RS422 serial ports, type 16550 buffered UARTs, and, for Windows compatibility, automatic control to transparently enable/disable the transmission drivers.
  • Page 7 Specifications Communications Interface • I/O Connection: 9-pin D-sub connectors • Serial Ports: Four shielded male D-sub 9-pin IBM AT style connectors compatible with RS422 specifications. (Note: On model an external "spider" or breakout cable terminates with four female D-sub 9-pin connectors.) •...
  • Page 8 Figure 1-1: Block Diagram(Only One Serial Channel Shown) Manual PCI-COM-422/4...

  • Page 9: Chapter 2: Installation

    Chapter 2: Installation A printed Quick-Start Guide (QSG) is packed with the card for your convenience. If you’ve already performed the steps from the QSG, you may find this chapter to be redundant and may skip forward to begin developing your application. The software provided with this card is on CD and must be installed onto your hard disk prior to use.
  • Page 10 Hardware Installation Make sure to set switches and jumpers from either the Option Selection section of this manual or from the suggestions of SETUP.EXE. Do not install card into the computer until the software has been fully installed. Turn OFF computer power AND unplug AC power from the system. Remove the computer cover.

  • Page 11: Chapter 3: Option Selection

    Chapter 3: Option Selection To help you locate the jumpers described in this section, refer to Figure 3-2, Option Selection Map at the end of this section. Operation of the serial communications section is determined by jumper installation as described in the following paragraphs. Terminations A transmission line should be terminated at the receiving end in its characteristic impedance.
  • Page 12 MSDN library, documentid:mk:@ivt:nt40res/D15/S55FC.HTM, also available in the WindowsNT Resource Kit. The text enclosed in brackets ("[ ]") denotes a comment by the editors. The Microsoft serial driver can be used to control many dumb multiport serial cards. Dumb indicates that the control includes no on-board processor.
  • Page 13 Figure 3-2: Option Selection Map Manual PCI-COM-422/4...

  • Page 14: Chapter 4: Address Selection

    Chapter 4: Address Selection The card uses four separate address spaces. COM A occupies 16 consecutive register locations and COM B, COM C, and COM D each occupy eight consecutive register locations. PCI architecture is Plug-and-Play. This means that the BIOS or Operating System determines the resources assigned to PCI cards rather than you selecting those resources with switches or jumpers.

  • Page 15: Chapter 5: Programming

    Chapter 5: Programming Sample Programs There are sample programs provided with the card in C, Pascal, QuickBASIC, and several Windows languages. DOS samples are located in the DOS directory and Windows samples are located in the WIN32 directory. Windows Programming The card installs into Windows as COM ports.
  • Page 16 Initialization Initializing the chip requires knowledge of the UART's register set. The first step is to set the baud rate divisor. You do this by first setting the DLAB (Divisor Latch Access Bit) high. This bit is Bit 7 at Base Address +3.
  • Page 17 Bit 7 is the DLAB discussed earlier. It must be set to zero after the divisor is loaded or else there will be no communications. The C command to set the UART for an 8-bit word, no parity, and one stop bit is: outportb(BASEADDR +3, 0x03) The final initialization step is to flush the receiver buffers.
  • Page 18 The following C code fragment demonstrates this process: outportb(BASEADDR +4, inportb(BASEADDR +4)|0x02); /*Set RTS bit without altering states of other bits*/ while(data[i]); /*While there is data to send*/ while(!(inportb(BASEADDR +5)&0x20)); /*Wait until transmitter is empty*/ outportb(BASEADDR,data[i]); i++; outportb(BASEADDR +4, inportb(BASEADDR +4)&0xFD); /*Reset RTS bit without altering states of other bits*/ Manual PCI-COM-422/4...

  • Page 19: Chapter 6: Connector Pin Assignments

    Chapter 6: Connector Pin Assignments The popular 9-pin D subminiature connector is used for interfacing to communication lines. The connector is equipped with 4-40 threaded standoffs (female screw lock) to provide strain relief. Pin No. RS422 Signals GND Ground Table 6-1: Connector Pin Assignments Manual PCI-COM-422/4...
  • Page 20 Customer Comments If you experience any problems with this manual or just want to give us some feedback, please email us at: manuals@accesio.com. Please detail any errors you find and include your mailing address so that we can send you any manual updates. 10623 Roselle Street, San Diego CA 92121 Tel.
  • Page 21 Artisan Technology Group is your source for quality new and certified-used/pre-owned equipment SERVICE CENTER REPAIRS WE BUY USED EQUIPMENT • FAST SHIPPING AND DELIVERY Experienced engineers and technicians on staff Sell your excess, underutilized, and idle used equipment at our full-service, in-house repair center We also offer credit for buy-backs and trade-ins •...