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Manual PCI-DIO-48JP/JPS

17

INTERRUPT EXAMPLES

A rising edge with at least a microsecond hold time will be latched if the IEN jumper is in place and if any
address decoded by the board has been read or written to. Interrupts are disabled on ‘power up’. An
interrupt service routine may clear all interrupts from the board by writing any value to Base Fh.

Example 1:

Internal interrupt (generated by software)

The interrupt option jumper for the group must be in the IEN position. Configure port C Low as an output
and set bit C3 low. Enable interrupts globally by writing to Base Bh. Toggle bit C3 high for at least
1 uS then low. Note that this pulse will show up at pin 5 or 41 of the connector.

Example 2:

External

interrupt

The interrupt option jumper for the group must be in the IEN position. Configure port C Low as an input and
enable interrupts globally by reading any address decoded by the board. The pulse at pins 9 or 59 (bit C3)
must go high for at least 1 uS then low.

Example 3:

Gating the external interrupt

An open-collector (or open-drain) driver must connect to pin 5 or 41 to avoid contention (this is critical).
Write 0XXX (where X is ‘don’t care’) to port C Low. To gate the external interrupt ‘off’ configure port C Low
as an output (don’t change the value of the most significant bit). To gate the external interrupt ‘on’ configure
port C Low as an input.

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Содержание PCI-DIO-48JP

Страница 1: ...23 Roselle Street San Diego CA 92121 858 550 9559 FAX 858 550 7322 contactus accesio com www accesio com DIGITAL INPUT OUTPUT CARD Models PCI DIO 48JP and PCI DIO 48JPS USER MANUAL File MPCI DIO 48JPS A1e ...

Страница 2: ...CCES 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 1998 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 ALWAYS TURN COMPUTER POWER OFF BEFORE INSTALLING A CARD CONNECTI...

Страница 3: ... or parts not excluded by warranty Warranty commences with equipment shipment Following Years Throughout your equipment s lifetime ACCES stands ready to provide on site or in plant service at reasonable rates similar to those of other manufacturers in the industry Equipment Not Manufactured by ACCES Equipment provided but not manufactured by ACCES is warranted and will be repaired according to the...

Страница 4: ...ess Selection 10 Chapter 5 Software 11 Chapter 6 Programming 13 Table 6 1 Address Assignment Table 13 Table 6 2 Control Register Bit Assignment 14 Table 6 3 Control Register Configuration 15 Table 6 4 Change of State Interrupt Enable Register 16 Chapter 7 Connector Pin Assignments 18 Table 7 1 Connector Pin Assignments 18 Figure 7 1 68 Pin Female SCSI Pin Locations 18 Table 7 2 Connector Pin Assig...

Страница 5: ... interface to 48 lines Each PPI provides three 8 bit ports A B and C Each 8 bit port can be software configured to function either as inputs or as latched outputs Port C can also be software configured for four inputs and four latched outputs Pull ups on the cards assure that there are no erroneous outputs at power up until the card is initialized by system software The feature that distinguishes ...

Страница 6: ...address space The base address is selected by the system An illustrated setup program is provided on the diskette or CD shipped with your card Interactive displays show locations and proper configuration of jumpers to set up the interrupt enable function Also sample programs in Turbo C and Turbo Pascal are presented in the Software section of this manual PCI BUS CONTROL LOGIC INTERRUPT ENABLE PPI ...

Страница 7: ...ons for usage of the various card options CD Software Installation The following instructions assume the CD ROM drive is drive D Please substitute the appropriate drive letter for your system as necessary DOS 1 Place the CD into your CD ROM drive 2 Type B to change the active drive to the CD ROM drive 3 Type GLQR JJ to run the install program 4 Follow the on screen prompts to install the software ...

Страница 8: ...gned resources 10 Run one of the provided sample programs that was copied to the newly created card directory from the CD to test and validate your installation The base address assigned by BIOS or the operating system can change each time new hardware is installed into or removed from the computer Please recheck PCIFind or Device Manager if the hardware configuration is changed Software you write...

Страница 9: ...ing or disabling the 74LS245 input output buffers under program control is provided at the jumper position labeled TST BEN When the jumper is in the BEN Buffer Enable position the I O buffers are always enabled When the jumper is in the TST Tristate position enabled disabled state is controlled by a control register See the programming section of this manual for a description NOTE A jumper must be...

Страница 10: ...h of the cards and the respective IRQs allotted Alternatively some operating systems Windows95 and WindowsNT 5 0 can be queried to determine which resources were assigned In these operating systems you can use either PCIFind or the Device Manager utility from the System Properties Applet of the control panel The cards are installed in the Data Acquisition class of the Device Manager list Selecting...

Страница 11: ...sions are in the form of a DLL a GBL and a VisualBASIC sample Together these files allow you to access the port and main memory space in a fashion similar to BASIC QuickBASIC Pascal C C Assembly and most other standard languages To use these files in a VisualBASIC program you must create a MAK file File l New Project similar to the sample provided or else modify your existing project file and incl...

Страница 12: ...nt less intuitive All integers in BASIC are signed numbers wherein data are stored in two s complement form All bit patterns must be converted to and from this two s complement form if meaningful display is required Otherwise values returned from the InPortb function will be 128 to 127 rather than 0 to 255 An alternative is to perform all assignments in hexadecimal rather then decimal form Before ...

Страница 13: ... 0 Port C Group 0 Control Group 0 Port A Group 1 Port B Group 1 Port C Group 1 Control Group 1 Enable Disable Buffer Grp 0 Enable Disable Buffer Grp 1 Enable Chg of St Interrupt Clear Chg of St Interrupt Read Write Read Write Read Write Write Only Read Write Read Write Read Write Write Only Write Only Write Only Write Only Write Only Table 6 1 Address Assignment Table These cards use two type 8255...

Страница 14: ...ssociated PPI chip as well as the mode can be set For example a write to Base Address 3 with data bit D7 high programs port direction at group 0 ports A B and C If for example hex 80 is sent to Base Address 3 the group 0 PPI will be configured in mode 0 with ports A B and C as outputs At the same time data bit D7 is also latched in a buffer controller for the associated PPI chip A high state disab...

Страница 15: ...low See item d above outportb BASE_ADDRESS 3 0x09 PROGRAMMING EXAMPLE BASIC The following example in BASIC is provided as a guide to assist you in developing your working software In this example the card base address is 2D0 hex and the I O lines of group 0 are to be setup as follows Port A Input Port B Output Port C Hi Input Port C Lo Output The first step is to configure the control register Con...

Страница 16: ...rite to the Control Register with bit D7 low If you wish to subsequently disable the buffers you can write to the Control Register with bit D7 high In this way you can enable disable the output buffers without programming the PPI mode Note When writing a command byte to these cards while the TST jumper is installed the PPI output buffers are disabled Thus when you desire to to change the mode you ...

Страница 17: ...ddress Bh Toggle bit C3 high for at least 1 uS then low Note that this pulse will show up at pin 5 or 41 of the connector Example 2 External interrupt The interrupt option jumper for the group must be in the IEN position Configure port C Low as an input and enable interrupts globally by reading any address decoded by the board The pulse at pins 9 or 59 bit C3 must go high for at least 1 uS then lo...

Страница 18: ...p 0 Port B Group 0 Port B Group 0 Port B Group 0 Port B Group 0 Port B Group 0 Port B Group 0 Port B Group 0 Port B Group 0 Port A Group 0 Port A Group 0 Port A Group 0 Port A Group 0 Port A Group 0 Port A Group 0 Port A Group 0 Port A 5 VDC PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0 PB7 PB6 PB5 PB4 PB3 PB2 PB1 PB0 PA7 PA6 PA5 PA4 PA3 PA2 PA1 PA0 1 2 3 4 5 6 7 8 13 14 15 16 17 18 19 20 25 26 27 28 29 30 31 3...

Страница 19: ...ort B Group 1 Port B Group 1 Port B Group 1 Port B Group 1 Port A Group 1 Port A Group 1 Port A Group 1 Port A Group 1 Port A Group 1 Port A Group 1 Port A Group 1 Port A 5 VDC PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0 PB7 PB6 PB5 PB4 PB3 PB2 PB1 PB0 PA7 PA6 PA5 PA4 PA3 PA2 PA1 PA0 37 38 39 40 41 42 43 44 49 50 51 52 53 54 55 56 59 60 61 62 63 64 65 66 67 Ground Ground 35 36 45 46 47 48 57 58 This line is a...

Страница 20: ...s 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 858 550 9559 FAX 858 550 7322 www accesio com ...

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