===== Change Pump Example =====

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

To do it 

  - Goto the "Software PLC" \\ \\ {{mycnc:plc:mycnc-charge-pump-001.png}} \\ \\
  - Press "Add" to add new PLC procedure \\ \\ {{mycnc:plc:mycnc-charge-pump-002-1.png}} \\ \\
  - Enter the procedure filename (CHARGE_PUMP), press "OK" button \\ \\ {{mycnc:plc:mycnc-charge-pump-002.png}} \\ \\
  - Enter source code for change pump \\ \\ <code C CHARGE_PUMP.plc>main() 
{
  n=0;
  port=0;

  do{
   n++;
   if (n&1) { portset(port); } else {portclr(port);};
  }while(1);

  exit(99);
};
</code> \\  \\ {{mycnc:plc:mycnc-charge-pump-004.png}} \\ \\
  - Press buttons "Save" and "Build"  \\ \\ {{mycnc:plc:mycnc-charge-pump-005.png}} \\ \\

Output pin defined "port" variable will start pulse generation.

<code C>
....
  port=0;
....
</code>

The result oscillogram is shown below

{{mycnc:plc:mycnc-charge-pump-006.png?800}}