National Instruments AutoCode NI MATRIX - Manual (Page 146)

Chapter 5 Generated Code Architecture
AutoCode Reference 5-38 ni.com
Parameterized UCB Callout
A UCB can be defined with %var parameterized data for the UCB’s real
parameters (
RP ) and integer parameters ( IP ). When used, AutoCode
generates code that passes the %var variable as the actual of the UCB
callout. A new option,
-ucbparams , creates a temporary array within the
subsystem code and passes the temporary arrays as actuals of the UCB
callout. The temporary arrays are initialized with the values of the %var
when the code was generated. Using the temporary arrays allows the UCB
to change its
RP / IP parameters without affecting the %var.
Example 5-18 clarifies this. Assume a UCB is parameterized with the %var
named
floatdata for the UCB’s real parameters and the %var named
integerdata for the UCB’s integer parameters.
Example 5-18 Relevant Code for UCB Call
/*-------------------------------------*/
/* USRxx(INFO,T,U,NU,X,XDOT,NX,Y,NY,RP,IP) */
usr01(&I->usr01_13_i, TIME, &usr01_13_u[0], 1, &dummp_f[0],
&dummy_f[0], 0, &usr01_13_y[0], 1, &floatdata[0],
&integerdata[0]);
/*-------------------------------------*/
Relevant code for UCB call with -ucbparams option
/*------------------------------------------------------------*/
static RT_INTEGER I_P[4];
static RT_FLOAT R_P[3];
static const RT_INTEGER _I_P[4] = {3, 5, 30, 40};
static const RT_FLOAT _R_P[3] = {2.05, 3.45, 7.63};
if (SUBSYS_PREINIT[1]) {
for( cnt=0;cnt<4;cnt++) {
I_P[cnt] = _I_P[cnt];
}
for( cnt=0;cnt<3;cnt++) {
R_P[cnt] = _R_P[cnt];
}
}
/* USRxx(INFO,T,U,NU,X,XDOT,NX,Y,NY,RP,IP)*/
usr01(&I->usr01_13_i, TIME, &usr01_13_u[0], 1, &dummp_f[0], &dummy_f[0],
0, &usr01_13_y[0], 1, &R_P[0], &I_P[0]);
/*------------------------------------------------------------*/