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Table of Contents
Registers Format .....................................................................20
3.1
PCI PnP Registers ...............................................................20
3.2
I/O Address Map ..................................................................21
Operation Theorem..................................................................22
4.1
Digital I/O Ports ....................................................................22
4.1.1
Introduction.....................................................................................22
4.1.2
8255 Mode 0...................................................................................22
4.1.3
Special Function of the DIO Signals ...............................................22
4.1.4
Digital I/O Port Programming..........................................................23
4.1.5
Control Word ..................................................................................23
4.1.6
Power on Configuration ..................................................................24
4.1.7
Note for Output Data.......................................................................24
4.1.8
Note for cPCI-7249R ......................................................................24
4.2
Timer/Counter Operation......................................................25
4.2.1
Introduction.....................................................................................25
4.2.2
General Purpose Timer/Counter.....................................................25
4.2.2
Cascaded 32 Bits Timer .................................................................26
4.2.3
Event Counter and Edge Control ....................................................26
4.3
Interrupt Multiplexing ............................................................26
4.3.1
Architecture ....................................................................................26
4.3.2
IRQ Level Setting............................................................................27
4.3.3
Note for Dual Interrupts ..................................................................27
4.3.4
Interrupt Source Control .................................................................28
4.4
12V and 5V Power Supply ...................................................29
C/C++ Libraries ........................................................................30
5.1
Libraries Installation ............................................................30
5.2
Programming Guide .............................................................31
5.2.1
Naming Convention ........................................................................31
5.2.2
Data Types .....................................................................................31
5.3
_7248/96_Initial ....................................................................32
5.4
Digital Input...........................................................................33
5.5
Digital Output........................................................................35
5.6
Configuration Port ................................................................36
5.7
Configuration Channel..........................................................37
5.8
Set Interrupt Control .............................................................39
5.9
Timer Start............................................................................40
5.10
Timer Read...........................................................................41
5.11
Timer Stop ............................................................................42
5.12
Cascaded Timer ...................................................................43
5.13
Get IRQ Status .....................................................................44
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