// pa9 ledka na xplained modulku

	PORT->Group[0].DIRSET.reg = PORT_PA09;
	PORT->Group[0].CTRL.reg = PORT_PA09; // enable synchronizer (faster reading)
	PORT->Group[0].PINCFG[9].reg = PORT_PINCFG_DRVSTR;
  
  
  // scan tlačítka
  if (PORT->Group[0].IN.reg & PORT_PA25)
	{
		PORT->Group[0].OUTSET.reg = PORT_PA09;
	}
	else
	{
		PORT->Group[0].OUTCLR.reg = PORT_PA09;
	}