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National Instruments PC-DIO-24 manual

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Table of contents for the manual

  • Page 1

    © Copyright 1989, 1995 National Instruments Corporation. All Rights Reserved. PC-DIO-24 User Manual Digital I/O Board for the IBM PC/XT/AT September 1995 Edition Part Number 320288B-01[...]

  • Page 2

    National Instruments Corporate Headquarters 6504 Bridge Point Parkway Austin, TX 78730-5039 (512) 794-0100 Technical support fax: (800) 328-2203 (512) 794-5678 Branch Offices: Australia 03 9 879 9422, Austria 0662 45 79 90 0, Belgium 02 757 00 20, Canada (Ontario) 519 622 9310, Canada (Québec) 514 694 8521, Denmark 45 76 26 00, Finland 90 527 2321[...]

  • Page 3

    Limited Warranty The PC-DIO-24 is warranted against defects in materials and workmanship for a period of one year from the date of shipment, as evidenced by receipts or other documentation. National Instruments will, at its option, repair or replace equipment that proves to be defective during the warranty period. This warranty includes parts and l[...]

  • Page 4

    WARNING REGARDING MEDICAL AND CLINICAL USE OF NATIONAL INSTRUMENTS PRODUCTS National Instruments products are not designed with components and testing intended to ensure a level of reliability suitable for use in treatment and diagnosis of humans. Applications of National Instruments products involving medical or clinical treatment can create a pot[...]

  • Page 5

    FCC/DOC Radio Frequency Interference Compliance This equipment generates and uses radio frequency energy and, if not installed and used in strict accordance with the instructions in this manual, may cause interference to radio and television reception. This equipment has been tested and found to comply with the following two regulatory agencies: Fe[...]

  • Page 6

    © National Instruments Corporation vii PC-DIO-24 User Manual Contents About This Manual ............................................................................................................. xi Organization of This Manual ......................................................................................... xi Conventions Used in This Ma[...]

  • Page 7

    Contents PC-DIO-24 User Manual viii © National Instruments Corporation Chapter 4 Register-Level Programming ......................................................................................... 4-1 Introduction .................................................................................................................... 4-1 82C55A Modes [...]

  • Page 8

    Contents © National Instruments Corporation ix PC-DIO-24 User Manual Figures Figure 1-1. The Relationship between the Programming Environment, NI-DAQ, and Your Hardware ................................................................................................... 1-3 Figure 2-1. PC-DIO-24 Parts Locator Diagram ................................[...]

  • Page 9

    © National Instruments Corporation xi PC-DIO-24 User Manual About This Manual This manual describes the mechanical and electrical aspects of the PC-DIO-24 and contains information concerning its operation and programming. The PC-DIO-24 is a 24-bit parallel, digital I/O interface designed around an 82C55A programmable peripheral interface (PPI). Th[...]

  • Page 10

    About This Manual PC-DIO-24 User Manual xii © National Instruments Corporation • The Index alphabetically lists the topics in this manual, including the page where you can find each one. Conventions Used in This Manual The following conventions are used in this manual. bold Bold text denotes menus, menu items, or dialog box buttons or options. b[...]

  • Page 11

    About This Manual © National Instruments Corporation xiii PC-DIO-24 User Manual • Your SCXI hardware user manuals—If you are using SCXI, read these manuals next for detailed information about signal connections and module configuration. They also explain in greater detail how the module works and contain application hints. • Your DAQ hardwar[...]

  • Page 12

    © National Instruments Corporation 1-1 PC-DIO-24 User Manual Chapter 1 Introduction This chapter describes the PC-DIO-24, lists what you need to get started, describes software programming choices, optional equipment, and custom cables, and explains how to unpack the PC-DIO-24. About the PC-DIO-24 Thank you for purchasing the National Instruments [...]

  • Page 13

    Introduction Chapter 1 PC-DIO-24 User Manual 1-2 © National Instruments Corporation With the PC-DIO-24, the PC can serve as a digital I/O system controller for laboratory testing, production testing, and industrial process monitoring and control. Detailed specifications of the PC-DIO-24 are in Appendix A, Specifications . What You Need to Get Star[...]

  • Page 14

    Chapter 1 Introduction © National Instruments Corporation 1-3 PC-DIO-24 User Manual NI-DAQ Driver Software The NI-DAQ driver software is included at no charge with all National Instruments DAQ hardware. NI-DAQ is not packaged with SCXI or accessory products, except for the SCXI-1200. NI -DAQ has an extensive library of functions that you can call [...]

  • Page 15

    Introduction Chapter 1 PC-DIO-24 User Manual 1-4 © National Instruments Corporation Register-Level Programming The final option for programming any National Instruments DAQ hardware is to write register- level software. Writing register-level programming software can be very time-consuming and inefficient, and is not recommended for most users. Ev[...]

  • Page 16

    Chapter 1 Introduction © National Instruments Corporation 1-5 PC-DIO-24 User Manual • Electronic Products Division/3M (part number 3425-7650) • T&B/Ansley Corporation (part number 609-5041CE) The standard ribbon cable (50-conductor, 28 AWG, stranded) that can be used with these connectors is as follows: • Electronic Products Division/3M [...]

  • Page 17

    Introduction Chapter 1 PC-DIO-24 User Manual 1-6 © National Instruments Corporation Unpacking Your PC-DIO-24 board is shipped in an antistatic package to prevent electrostatic damage to the board. Electrostatic discharge can damage several components on the board. To avoid such damage in handling the board, take the following precautions: • Grou[...]

  • Page 18

    © National Instruments Corporation 2-1 PC-DIO-24 User Manual Chapter 2 Configuration and Installation This chapter describes how to configure and install the PC-DIO-24, including I/O connector signal descriptions, handshake timing diagrams, and cabling instructions. Board Configuration The PC-DIO-24 contains one DIP switch and two jumpers to confi[...]

  • Page 19

    Configuration and Installation Chapter 2 PC-DIO-24 User Manual 2-2 © National Instruments Corporation 4 3 2 1 NATION AL INSTRUMENTS    1U 2 2W 1 3F 1 4W 2 Figure 2-1. PC-DIO-24 Parts Locator Diagram Base I/O Address Settings The base I/O address for the PC-DIO-24 is determined by the switches at position U2 (see Figure 2-1). The switches [...]

  • Page 20

    Chapter 2 Configuration and Installation © National Instruments Corporation 2-3 PC-DIO-24 User Manual U2 DIP switches, press the side marked OFF to select a binary value of 1 for the corresponding address bit. Press the other side of the switch to select a binary value of 0 for the corresponding address bit. Figure 2-2 shows two possible switch se[...]

  • Page 21

    Configuration and Installation Chapter 2 PC-DIO-24 User Manual 2-4 © National Instruments Corporation Interrupt Selection There are two sets of jumpers for interrupt selection on the PC-DIO-24 board. W1 is used for selecting the interrupt enable line. W2 is for selecting the interrupt level. The location of these jumpers is shown in Figure 2-1. In[...]

  • Page 22

    Chapter 2 Configuration and Installation © National Instruments Corporation 2-5 PC-DIO-24 User Manual The PC-DIO-24 can share interrupt lines with other devices by using a tristate driver to drive its selected interrupt lines. Installation The PC-DIO-24 can be installed in any unused 8-bit or 16-bit expansion slot in your computer. After you make [...]

  • Page 23

    Configuration and Installation Chapter 2 PC-DIO-24 User Manual 2-6 © National Instruments Corporation Signal Connections I/O Connector Pin Description Figure 2-5 shows the pin assignments for the PC-DIO-24 digital I/O connector. Warning: Connections that exceed any of the maximum ratings of input or output signals on the PC-DIO-24 may result in da[...]

  • Page 24

    Chapter 2 Configuration and Installation © National Instruments Corporation 2-7 PC-DIO-24 User Manual Signal Connection Descriptions Pin Signal Name Description 1, 3, 5, 7, 9, 11, 13, 15 PC<7..0> Port C—Bidirectional data lines for port C. PC7 is the MSB, PC0 the LSB. 17, 19, 21, 23, 25, 27, 29, 31 PB<7..0> Port B—Bidirectional dat[...]

  • Page 25

    Configuration and Installation Chapter 2 PC-DIO-24 User Manual 2-8 © National Instruments Corporation Timing Specifications This section lists the timing specifications for handshaking with the PC-DIO-24. The handshaking lines STB* and IBF synchronize input transfers. The handshaking lines OBF* and ACK* synchronize output transfers. The following [...]

  • Page 26

    Chapter 2 Configuration and Installation © National Instruments Corporation 2-9 PC-DIO-24 User Manual Mode 1 Input Timing The following figure illustrates the timing specifications for an input transfer in mode 1. T3 T5 T6 T7 T4 T1 T2 STB* IBF INTR RD* D ATA Name Description Minimum Maximum T1 STB* pulse width 100 – T2 STB* = 0 to IBF = 1 – 15[...]

  • Page 27

    Configuration and Installation Chapter 2 PC-DIO-24 User Manual 2-10 © National Instruments Corporation Mode 1 Output Timing The following figure illustrates the timing specifications for an output transfer in mode 1. T2 T3 WR* OBF* INTR DA T A T4 T6 T5 ACK* T1 Name Description Minimum Maximum T1 WR* = 0 to INTR = 0 – 250 T2 WR* = 1 to output –[...]

  • Page 28

    Chapter 2 Configuration and Installation © National Instruments Corporation 2-11 PC-DIO-24 User Manual Mode 2 Bidirectional Timing The following figure illustrates the timing specifications for bidirectional transfers in mode 2. T2 T1 WR* OBF* INTR ACK* D ATA T6 T7 T3 T4 T10 STB* T9 T8 T5 IBF RD* Name Description Minimum Maximum T1 WR* = 1 to OBF*[...]

  • Page 29

    © National Instruments Corporation 3-1 PC-DIO-24 User Manual Chapter 3 Theory of Operation This chapter contains a functional overview of the PC-DIO-24 board and explains the operation of each functional unit making up the PC-DIO-24. The block diagram in Figure 3-1 illustrates the key functional components of the PC-DIO-24 board. I/O Connector Int[...]

  • Page 30

    Theory of Operation Chapter 3 PC-DIO-24 User Manual 3-2 © National Instruments Corporation Address Decoder The base address used by the board is determined by an onboard switch setting. The address on the PC I/O Channel bus is monitored by the address decoder. If the address on the bus matches the selected I/O base address of the board, the board [...]

  • Page 31

    © National Instruments Corporation 4-1 PC-DIO-24 User Manual Chapter 4 Register-Level Programming This chapter describes in detail the address and function of each of the PC-DIO-24 control and status registers. This chapter also includes important information related to register-level programming the PC-DIO-24. The PC-DIO-24 is a parallel, digital[...]

  • Page 32

    Register-Level Programming Chapter 4 PC-DIO-24 User Manual 4-2 © National Instruments Corporation Mode 0 This mode can be used for simple input and output operations for each of the ports. No handshaking is required; data is simply written to or read from a selected port. Mode 0 has the following features: • Two 8-bit ports (A and B) and two 4-b[...]

  • Page 33

    Chapter 4 Register-Level Programming © National Instruments Corporation 4-3 PC-DIO-24 User Manual Register Map The following table lists the address map for the PC-DIO-24. The registers PORTA, PORTB, PORTC, and CNFG are 8-bit registers in the 82C55A. Table 4-1. PC-DIO-24 Address Map Register Offset Address (Hex) Size Type PORTA PORTB PORTC CNFG 0x[...]

  • Page 34

    Register-Level Programming Chapter 4 PC-DIO-24 User Manual 4-4 © National Instruments Corporation D2 D1 D0 D5 D4 D3 D7 D6  (high nibble) 1 = input 0 = output Control W ord Flag 1 = mode set  00 = mode 0 01 = mode 1 1X = mode 2 Mode Selection  1 = input 0 = output Port A Port C  (lo w nibble) 1 = input 0 = output[...]

  • Page 35

    Chapter 4 Register-Level Programming © National Instruments Corporation 4-5 PC-DIO-24 User Manual Table 4-2. Port C Set/Reset Control Words Number Bit Set Bit Reset Bit Set or Control Word Control Word Reset in Port C 0 0xxx0001 0xxx0000 xxxxxxxn 1 0xxx0011 0xxx0010 xxxxxxnx 2 0xxx0101 0xxx0100 xxxxxnxx 3 0xxx0111 0xxx0110 xxxxnxxx 4 0xxx1001 0xxx[...]

  • Page 36

    Register-Level Programming Chapter 4 PC-DIO-24 User Manual 4-6 © National Instruments Corporation Table 4-3. Mode 0 I/O Configurations Control Word Group A Group B Number Bit Port A Port C 1 Port B Port C 2 76543210 0 10000000 Output Output Output Output 1 10000001 Output Output Output Input 2 10000010 Output Output Input Output 3 10000011 Output [...]

  • Page 37

    Chapter 4 Register-Level Programming © National Instruments Corporation 4-7 PC-DIO-24 User Manual /* EXAMPLE 1*/ outp(cnfg,0x80); /* Ports A, B, and C are outputs. */ outp(porta,0x12); /* Write data to port A. */ outp(portb,0x34); /* Write data to port B. */ outp(portc,0x56); /* Write data to port C. */ /* EXAMPLE 2*/ outp(cnfg,0x90); /* Port A is[...]

  • Page 38

    Register-Level Programming Chapter 4 PC-DIO-24 User Manual 4-8 © National Instruments Corporation During a mode 1 data read transfer, the status of the handshaking lines and interrupt signals can be obtained by reading port C. The port C status-word bit definitions for an input transfer are shown as follows. The following are the port C status-wor[...]

  • Page 39

    Chapter 4 Register-Level Programming © National Instruments Corporation 4-9 PC-DIO-24 User Manual Mode 1 Input Programming Example Main() { #define BASE_ADDRESS 0x210 /* Board located at address 210. */ #define PORTAoffset 0x00 /* Offset for port A */ #define PORTBoffset 0x01 /* Offset for port B */ #define PORTCoffset 0x02 /* Offset for port C */[...]

  • Page 40

    Register-Level Programming Chapter 4 PC-DIO-24 User Manual 4-10 © National Instruments Corporation The control word written to the CNFG Register to configure port B for output in mode 1 is shown as follows. Notice that port B does not have extra input or output lines from port C. 1 XXX X 10X 76543210 During a mode 1 data write transfer, the status[...]

  • Page 41

    Chapter 4 Register-Level Programming © National Instruments Corporation 4-11 PC-DIO-24 User Manual At the digital I/O connector, port C has the following pin assignments when in mode 1 output. Notice that the status of ACKA* and ACKB* is not included when port C is read. PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0 OBF A* ACKA* I/O?[...]

  • Page 42

    Register-Level Programming Chapter 4 PC-DIO-24 User Manual 4-12 © National Instruments Corporation Mode 2–Bidirectional Bus Mode 2 has an 8-bit bus that can transfer both input and output without changing the configuration. The data transfers are synchronized with handshaking lines in port C. This mode uses only port A; however, port B can be us[...]

  • Page 43

    Chapter 4 Register-Level Programming © National Instruments Corporation 4-13 PC-DIO-24 User Manual Bit Name Description (continued) 4 INTE2 Interrupt Enable Bit for Input—If this bit is set, interrupts are enabled from the 82C55A for IBFA. Controlled by bit set/reset of PC4. 3 INTRA Interrupt Request Status—If INTE1 is high and IBFA is high, t[...]

  • Page 44

    Register-Level Programming Chapter 4 PC-DIO-24 User Manual 4-14 © National Instruments Corporation /* EXAMPLE 1*/ outp(cnfg,0xC0); /* Port A is in mode 2. */ while (!(inp(portc) & 0x80)); /* Wait until OBFA* is set, indicating that the data last written to port A has been read.*/ outp(porta,0x67); /* Write the data to port A. */ while (!(inp(p[...]

  • Page 45

    Chapter 4 Register-Level Programming © National Instruments Corporation 4-15 PC-DIO-24 User Manual /* EXAMPLE 3–Set up interrupts for mode 1 output for port A. Select PC4 as the interrupt enable bit. */ outp(cnfg,0xA0); /* Port A is an output in mode 1. */ outp(cnfg,0x0D); /* Set PC6 to enable interrupts from 82C55A. */ outp(cnfg,0x0C); /* Clear[...]

  • Page 46

    Register-Level Programming Chapter 4 PC-DIO-24 User Manual 4-16 © National Instruments Corporation Table 4-4. Interrupt Enable Signals for All Mode Combinations Port A Port A Port B Port B Port A Port A Port B Port A Interrupt Mode 2 Mode 2 Mode 1 Mode 1 Mode 1 Mode 1 Mode 0 Mode 0 Enable Output Input Output Input Output Input Bit No No No No No N[...]

  • Page 47

    © National Instruments Corporation A-1 PC-DIO-24 User Manual Appendix A Specifications This appendix lists the specifications for the PC-DIO-24 board. These specifications are typical at 25 ° C, unless otherwise stated. The operating temperature range is 0 ° to 70 ° C. Digital I/O Number of channels .............................................[...]

  • Page 48

    Specifications Appendix A PC-DIO-24 User Manual A-2 © National Instruments Corporation Physical Dimensions .................................................................. 17.5 by 9.9 cm (6.9 in. by 3.9 in.) I/O connector ............................................................... 50-pin male ribbon-cable connector Power Requirement (from PC[...]

  • Page 49

    © National Instruments Corporation B-1 PC-DIO-24 User Manual Appendix B I/O Connector This appendix describes the pinout and signal names for the I/O connector on the PC-DIO-24. Figure B-1 shows the PC-DIO-24 digital I/O connector. 12 34 56 78 9 10 1 1 12 13   14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 4[...]

  • Page 50

    © Na t ion a l I ns tr u men ts C or po ra ti o n C- 1 PC -DIO-24 User Manual Appendix C OKI 82C55A Data Sheet * T h is appen d ix conta in s t h e man u factur er d ata s h ee t fo r the OK I Se m ic o nd u ctor 8 2C5 5 A CMO S pr ogr amma ble p er iphera l int e rfa c e (PPI ). Th i s in terfac e i s u s e d on th e DAQCard-DI O-24. * C o py r i[...]

  • Page 51

    Appendix C OKI 82C55A Data Sheet PC -DIO-24 User Manual C- 2 © Natio nal Inst rument s Corpora tion[...]

  • Page 52

    Appendix C OKI 82C55A Dat a Sheet © Na t ion a l I ns tr u men ts C or po ra ti o n C- 3 PC -DIO-24 User M anual[...]

  • Page 53

    Appendix C O KI 82C55A Data Sheet PC -DIO-24 User Manual C- 4 © Natio nal Inst rument s Corpora tion[...]

  • Page 54

    Appendix C OKI 82C55A Dat a Sheet © Na t ion a l I ns tr u men ts C or po ra ti o n C- 5 PC -DIO-24 User M anual[...]

  • Page 55

    Appendix C O KI 82C55A Data Sheet PC -DIO-24 User Manual C- 6 © Natio nal Inst rument s Corpora tion[...]

  • Page 56

    Appendix C OKI 82C55A Dat a Sheet © Na t ion a l I ns tr u men ts C or po ra ti o n C- 7 PC -DIO-24 User M anual[...]

  • Page 57

    Appendix C O KI 82C55A Data Sheet PC -DIO-24 User Manual C- 8 © Natio nal Inst rument s Corpora tion[...]

  • Page 58

    Appendix C OKI 82C55A Dat a Sheet © Na t ion a l I ns tr u men ts C or po ra ti o n C- 9 PC -DIO-24 User M anual[...]

  • Page 59

    Appendix C O KI 82C55A Data Sheet PC -DIO-24 User Manual C- 10 © Natio nal Inst rument s Corpora tion[...]

  • Page 60

    Appendix C OKI 82C55A Dat a Sheet © N at ion a l I ns t ru me nt s Co rp or at i on C-1 1 PC -DIO-24 User M anual[...]

  • Page 61

    Appendix C O KI 82C55A Data Sheet PC -DIO-24 User Manual C- 12 © Natio nal Inst rument s Corpora tion[...]

  • Page 62

    Appendix C OKI 82C55A Dat a Sheet © N at ion a l I ns t ru me nt s Co rp or at i on C-1 3 PC -DIO-24 User M anual[...]

  • Page 63

    Appendix C O KI 82C55A Data Sheet PC -DIO-24 User Manual C- 14 © Natio nal Inst rument s Corpora tion[...]

  • Page 64

    Appendix C OKI 82C55A Dat a Sheet © N at ion a l I ns t ru me nt s Co rp or at i on C-1 5 PC -DIO-24 User M anual[...]

  • Page 65

    Appendix C O KI 82C55A Data Sheet PC -DIO-24 User Manual C- 16 © Natio nal Inst rument s Corpora tion[...]

  • Page 66

    Appendix C OKI 82C55A Dat a Sheet © National Instruments Corporation C-17 PC-DIO-24 User Manual[...]

  • Page 67

    © National Instruments Corporation D - 1 PC-DIO-24 User Manual Appendix D Customer Communication __________________________________________________ _ For your convenience, this appendix contains forms to help you gather the information necessary to help us solve technical problems you might have as well as a form you can use to comment on the prod[...]

  • Page 68

    Technical Support Form ___________________________________________________ Photocopy this form and update it each time you make changes to your software or hardware, and use the completed copy of this form as a reference for your current configuration. Completing this form accurately before contacting National Instruments for technical support help[...]

  • Page 69

    PC-DIO-24 Hardware and Software Configuration Form ___________________________________________________ Record the settings and revisions of your hardware and software on the line to the right of each item. Complete a new copy of this form each time you revise your software or hardware configuration, and use this form as a reference for your current[...]

  • Page 70

    Documentation Comment Form ___________________________________________________ National Instruments encourages you to comment on the documentation supplied with our products. This information helps us provide quality products to meet your needs. Title: PC-DIO-24 User Manual Edition Date: September 1995 Part Number: 320288B-01 Please comment on the [...]

  • Page 71

    © National Instruments Corporation Glossary-1 PC-DIO-24 User Manual Glossary ___________________________________________________ Prefix Meaning Value µ - micro- 10 -6 m- milli- 10 -3 k- kilo- 10 3 M- mega- 10 6 ° degrees Ω ohms % percent A amperes AWG American Wire Gauge BCD binary-coded decimal C Celsius DMA direct memory access hex hexadecim[...]

  • Page 72

    © National Instruments Corporation Index- 1 PC-DIO-24 User Manual Index Special Characters +5 V signal (table), 2-7 82C55A Programmable Peripheral Interface. See OKI 82C55A Programmable Peripheral Interface. A ACK* signal description (table), 2-8 mode 1 output timing, 2-10 mode 2 bidirectional timing, 2-11 address, setting. See base I/O address. a[...]

  • Page 73

    Index PC-DIO-24 User Manual Index- 2 © National Instruments Corporation I IBF signal description (table), 2-8 mode 1 input timing, 2-9 mode 2 bidirectional timing, 2-11 IBFA bit, Port C, 4-8, 4-12 IBFB bit, Port C, 4-8 installation. See also configuration. procedure for, 2-5 unpacking the PC-DIO-24, 1-6 INTE1 bit, Port C, 4-12 INTE2 bit, Port C, 4[...]

  • Page 74

    Index © National Instruments Corporation Index- 3 PC-DIO-24 User Manual N NI-DAQ driver software, 1-3 O OBF* signal description (table), 2-8 mode 1 output timing, 2-10 mode 2 bidirectional timing, 2-11 OBFA* bit, Port C, 4-10 OBFB* bit, Port C, 4-10, 4-12 OKI 82C55A Programmable Peripheral Interface capabilities, 1-1 data sheet, C-1 to C-17 modes [...]

  • Page 75

    Index PC-DIO-24 User Manual Index- 4 © National Instruments Corporation mode 1 strobed output, 4-9 to 4-11 control words written to CNFG register (figure), 4-9 to 4-10 Port C pin assignments (figure), 4-11 Port C status-word bit definitions, 4-10 programming example, 4-11 mode 2 bidirectional bus, 4-12 to 4-14 control word written to CNFG Register[...]