Pepper Computer Modular Computers RS232 User Manual

SMART I/O User’s Manual

©1996 PEP Modular Computers GmbH

October 01, 1996

Page 5 - 113

Chapter 5  Analog Modules

The SM-DAC1 library of functions smartio.l provide a convenient way of

accessing the SM-DAC1 module.

• All functions are written in ANSI C;

• Prototypes are to be found in the file dac1lib.h.

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

• SM-DAC1 Module.

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 SMDAC1Init must first be

called. This allocates the requested resources and should be noted that it is

not designed for multi-tasking. Furthermore, this function needs to be called

for each SM-DAC1 Module  called within the task. Upon completion of the

application, the function SMDAC1DeInit needs to be called for each SM-

DAC1 Module that has been initialised.

In order to illustrate the use of the SM-DAC1 library, an application example

called demodac1.c can be found in the SMART I/O application directory

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