MATLAB SIMULINK 7 - DEVELOPING S-FUNCTIONS Guida Utente Scaricare il pdf (Pagina 143)

The C MEX S-Function SimStruct

3-99

ssSetOptions

(S,options)

Used in mdlInitializeSizes t o set any of the following options.

These options must be joined using the OR operator. For example:

ssSetOption(S, (SS_OPTION_EXCEPTION_FREE_CODE |

SS_OPTION_DISCRETE_VALUED_OUTPUT));

SS_OPTION_EXCEPTION_FREE_CODE

— If your S-function does not

use

mexErrMsgTxt, mxCalloc, or a ny other routines that can throw

an exception when called, you can set this option for improved

performance.

SS_OPTION_DISCRETE_VALUED_OUTPUT — Specify this if your

S-function has discrete valued outputs. This is checked when your

S-function is placed within an algebraic loop. If your S-function has

discrete valued outputs, then its outputs will not be assigned

algebraic variables.

SS_OPTION_PLACE_ASAP — Used to specify that your S-function

should be placed as soon as possible. This is typically used by

devices connecting to hardware.

SS_OPTION_ALLOW_INPUT_SCALAR_EXPANSION — Used t o specify

that the input to your S-function input ports can be either 1 or the

size specified by the port, which is usually referred t o as the block

width.

Table 3-5: General SimStruct Macros (Continued)

Macro Description

1 2 ... 138 139 140 141 142 143 144 145 146 147 148 ... 209 210

Nessun commento

MATLAB SIMULINK 7 - DEVELOPING S-FUNCTIONS Guida Utente Pagina 143