Experimental Physics and
Industrial Control System

Song Hu <[email protected]> · Thu, 21 Mar 2013 09:58:28 -0600

Hi, 

I would like to trigger some actions when a binary PV changes from 0 to 1. No action should be taken when it changes from 1 to 0. I made some code like: 

int bin;                  assign bin to "abc:bin";                                    monitor bin;
                                evflag  binFlag;                                                    sync  bin   binFlag;
ss ttt
{
  state testState
  {
     when(efTestAndClear(binFlag)&&(bin == 1))
     {     
           printf("Received a trigger!!\n");  
     }state testState
  }
}

When abc:bin changes from 0 to 1 and then quickly go back to 0, it is not working every time. 

What is the appropriate way to implement such positive edge only trigger?

Thanks in advance for your help.

Song 

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System