Multi-port switch

Library

Branching

Description

Dialog Box

Set parameters
number of inputs	2
zero base indexing (0), otherwise 1	1
rounding rule: int (0), round (1), ceil (2), floor (3)	3

• number of inputs: YYYY
• zero base indexing : YYYY
• rounding rule: int : YYYY

Default properties

• always active: no
• direct-feedthrough: yes
• zero-crossing: no
• mode: no
• number/sizes of inputs: 3 / 1 -1 -1
• number/sizes of outputs: 1 / -1
• number/sizes of activation inputs: 0 /
• number/sizes of activation outputs: 0 /
• continuous-time state: no
• discrete-time state: no
• name of computational function: mswitch

Interfacing function

scilab/macros/scicos_blocks/branching/M_SWITCH.sci

Computational function (type 4)

#include "scicos_block.h"
#include <math.h>

#define max(a,b) ((a) >= (b) ? (a) : (b))
#define min(a,b) ((a) <= (b) ? (a) : (b))

void  mswitch(scicos_block *block,int flag)
{
  int i,j;
  i=block->ipar[1];
  if (i==0) {
    if (*block->inptr[0]>0) {
      j=floor(*block->inptr[0]);
    }else{
      j=ceil(*block->inptr[0]);
    }
  }else if (i==1) {
    if (*block->inptr[0]>0) {
      j=floor(*block->inptr[0]+.5);
    }else{
      j=ceil(*block->inptr[0]-.5);
    }
  }else if (i==2) {
    j=ceil(*block->inptr[0]);
  }else if (i==3) {
    j=floor(*block->inptr[0]);
  }
  j=j+1-block->ipar[0];
  j=max(j,1);
  j=min(j,block->nin-1);
  for (i=0;i<block->insz[j];i++) {
    block->outptr[0][i]=block->inptr[j][i];
  }
}