void measure(void)							//frequenzmessung
{
	unsigned long low_byte=0;
	unsigned long high_byte=0;

	TR0=0;							//timer 0 stopp
	TF0=0;							//owerflow flag löschen
	TL0=0;							//start wert
	TH0=0;			
	ET0=1;							//enable interrupt timer t1
	
	TMOD &= 0xF0;						// TMOD Timer 0: 16 bit counter: 11.0592 MHz:
    TMOD |= 0x05;							//timer1 is incrementet by 1 to 0 input T1 pin14
	
    TR0=1;							//timer1 start
	
	DelayT0(5000);						//1s warten
	TR0=0;							//timer stop
	ET0=0;							//disable interrupt timer1
 
	low_byte=TL0;
	high_byte=TH0;
	
	CountBuf=(high_byte*0x80+low_byte)*2;
	if(owerflow ==1){
		CountBuf+=0x10000;
		owerflow=0;
	}

}