edgetrig.c File Reference

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

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Functions
void	edgetrig (scicos_block *block, int flag)

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Function Documentation

void edgetrig	(	scicos_block *	block,
		int	flag
	)

Definition at line 5 of file edgetrig.c.

References scicos_block::inptr, scicos_block::ipar, scicos_block::ng, scicos_block::outptr, sciprint(), set_block_error(), scicos_block::z, and z.

{
  double z= block->z[0],u=block->inptr[0][0];
  if(flag==2||flag==6){
    block->z[0]=u;
  }else if(flag==1){
    if(block->ipar[0]!=0){
      z=z*block->ipar[0];
      u=u*block->ipar[0];
      if(((z<=0)&(u>0))||((z<0)&(u>=0))) {
        block->outptr[0][0]=1.;
      }else{
        block->outptr[0][0]=0.;
      }
    } else{ /* rising and falling edge */
      if(((z<=0)&(u>0))||((z<0)&(u>=0))||((z>0)&(u<=0))||((z>=0)&(u<0))){
        block->outptr[0][0]=1.;
      }else{
        block->outptr[0][0]=0.;
      }
    }
  }else if (flag==4) {
    if (block->ng>0){
      set_block_error(-1);
      sciprint("Trigger block must have discrete time input.");
      return;
    }
  }
}

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