Pepper-computer Modular Computers RS485 Bedienungsanleitung PDF herunterladen (Seite 172)

SMART I/O User’s Manual

March 12, 1996

Page 5 - 16

Chapter 5 Analog Modules

5.1.8 ‘C’ Programming

5.1.8.1 SM-DAD1 Library

The SM-DAD1 library of functions smartio.l provide a convenient way of

accessing the SM-DAD1 module.

• All functions are written in ANSI C;

• Prototypes are to be found in the file dad1lib.h.

Hardware Requirements

• SMART I/O Base Module or Base Module and Extension unit;

• SM-DAD1 Module.

Software Requirements

The compiler from one of the following:

• Ultra C Version 1.1.2 or higher;

• FasTrak 2.0.2 or higher.

The leftmost SM-Module has number 0 assigned to it a far as programming

is concerned although physically this is slot 1!

Before a library function can be used, the function SMDAD1Init must first be

called. This allocates the requested resources. Furthermore, this function

needs to be called for each SM-DAD1 Module called within the task. Upon

completion of the application, the function SMDAD1DeInit needs to be

called for each SM-DAD1 Module that has been initialized.

In order to illustrate the use of the SM-DAD1 library, an application example

called demodad1.c can be found in the SMART I/O application directory

(normally found in /<device>/APPLIC/SMART/CMDS).

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Pepper-computer Modular Computers RS485 Bedienungsanleitung Seite 172