How to measure how long I pressed a button ?

[richard]

you have set timer1 to overflow every 16.38 mS , you never count the overflows
also adding 65535 to a word var seems very odd do you actually intend to subtract 1


i can't see how any of this can work, i makes no sense to me

while durata < longpress
    	if T1CON.0 == 1 then
        	overflow_counter_low = overflow_counter_low + 1
        	if overflow_counter_low == 65535 then
            		overflow_counter_low = 0
            		durata = durata + 65535
        	endif
    	endif    
    	durata = durata + (TMR1H * 256 + TMR1L)
wend