Charge pump output can be easily implemented in the Software PLC.

To do it

1. Goto the “Software PLC”
   
   
   
   
2. Press “Add” to add new PLC procedure
   
   
   
   
3. Enter the procedure filename (CHARGE_PUMP), press “OK” button
   
   
   
   
4. Enter source code for change pump
   
   

   CHARGE_PUMP.plc

   main() 
   {
     n=0;
     port=0;
    
     do{
      n++;
      if (n&1) { portset(port); } else {portclr(port);};
     }while(1);
    
     exit(99);
   };

   
   
   
   
   

5. Press buttons “Save” and “Build”
   
   
   
   

Output pin defined “port” variable will start pulse generation.

....
  port=0;
....

The result oscillogram is shown below