VXi VT1529A/B 사용자 설명서

This section describes how algorithms access hardware and software 
resources provided by the VT1422A. The resources are listed below:

•

I/O channels.

•

Remote Scan Status variables.

•

Global variables defined before algorithms are defined.

•

The constant ALG_NUM which the VT1422A makes available to the 

algorithms. ALG_NUM = 1 for ALG1, 2 for ALG2, etc.

•

User defined functions defined with the ALG:FUNC:DEF command. 

•

The Current Value Table (CVT) and the data FIFO buffer (FIFO) to 

output algorithm data to the application program.

•

VXIbus Interrupts.

/* GLOBALS you define with ALG:DEF GLOBALS...  go here */

/* global variable First_loop equals 1 until all algorithms called  */
static float First_loop; /* global value set to 1 at each INIT */
/**************************** function main() ****************************/
/*The VT1422A driver creates main() at INIT time. This example 
shows a main created after 2 algorithms have been defined. */
main()
{

/********* declaration of variables local to main() ********/
static float State_1, Ratio_1, Count_1;  /* created if alg1 defined */
static float State_2, Ratio_2, Count_2;  /* created if alg2 defined */

/********* this section created if ALG1 is defined ********/
Count_1 = Count_1 - 1; /* Count_1 used for ALG:SCAN:RATIO */
if (Count_1 <= 0) {         /* test for ratio met (<=0 means execute)*/ 

Count_1 = Ratio_1;   /* Count_1 = ALG:SCAN:RATIO setting  */
if (State_1) alg1();     /* if ALG:STATE ALG1,ON, call alg1       */

}

/********* this section created if ALG2 is defined ********/
Count_2 = Count_2 - 1; /* Count_2 used for ALG:SCAN:RATIO */
if (Count_2 <= 0) {         /* test for ratio met (<=0 means execute)*/ 

Count_2 = Ratio_2;   /* Count_2 = ALG:SCAN:RATIO setting  */
if (State_2) alg2();     /* if ALG:STATE ALG2,ON, call alg2        */

}
First_loop = 0;   /* reset First_loop after last alg has been called */

}
/* ************************ end function main() *************************/

ALG1()  /* this function shell created by ALG:DEF 'ALG1'....    */
{
const int ALG_NUM = 1; /* created by driver to ID this algorithm */

/********* Your algorithm code goes here **********/
}

ALG2()  /* this function shell created by ALG:DEF 'ALG2'....    */
{
const int ALG_NUM = 2; /* created by driver to ID this algorithm */

/********* Your algorithm code goes here **********/
}

(built by VT1422A's driver)

(built by VT1422A's driver)

First_loop declared by

VT1422A's driver