Pepper Computer RS232, RS485 8 ‘C’ Programming 5.5.8.1 SM-DAC1 Library, Hardware Requirements

Chapter 5 Analog Modules SMART I/O User’s Manual

5.5.8‘C’ Programming 5.5.8.1 SM-DAC1 Library

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.

Hardware Requirements

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

•SM-DAC1 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 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).

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