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PCI-1761 User Manual 26

C.1 Overview

The PCI-1761 is delivered with an easy-to-use 32-bit DLL driver for user program-

ming under the Windows XP/Vista/7 operating system. We advise users to program

the PCI-1761sing the 32-bit DLL driver provided by Advantech to avoid the complex-

ity of low-level programming by register. The most important consideration in pro-

gramming the PCI-1761 the register level is to understand the function of the card's

registers. The information in the following sections is provided only for users who

would like to do their own low-level programming.

C.2 I/O Port Address Map

The PCI-1761 requires 32 consecutive addresses in the PC's I/O space. The address

of each register is specified as an offset from the card's base address. For example,

BASE+0 is the card's base address and BASE+7 is the base address plus seven

bytes. Table C-1 shows the function of each register of the PCI-1761 or driver and its

address relative to the card's base address.

Table C.1: Register Functions

Base Addr,

+ Hex

76543210

R Relay Output Status

RS7 RS6 RS5 RS4 RS3 RS2 RS1 RS0

W Relay Output

RO7 RO6 RO5 RO4 RO3 RO2 RO1 RO0

R Isolated Digital Input

IDI7 IDI IDI5 IDI4 IDI3 IDI2 IDI1 IDI0

WN/A

R Board ID Register

BD3 BD2 BD1 BD0

WN/A

R Interrupt Enable Status

IDI7EN IDI6EN IDI5EN IDI4EN IDI3EN IDI2EN IDI1EN IDI0EN

W Interrupt Enable Register

IDI7EN IDI6EN IDI5EN IDI4EN IDI3EN IDI2EN IDI1EN IDI0EN

R Interrupt Triggering Status

IDI7RF IDI6RF IDI5RF IDI4RF IDI3RF IDI2RF IDI1RF IDI0RF

W Interrupt Triggering Register

IDI7RF IDI6RF IDI5RF IDI4RF IDI3RF IDI2RF IDI1RF IDI0RF

R Interrupt Flag

IDI7F IDI6F IDI5F IDI4F IDI3F IDI2F IDI1F IDI0F

W Interrupt Clear Register

IDI7CLR IDI6CLR IDI5CLR IDI4CLR IDI3CLR IDI2CLR IDI1CLR IDI0CLR

1 2 ... 27 28 29 30 31 32 33 34 35 36

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