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URGENT!....how do i write a program for timing??


anyone out there..pls help me out!..

im having problems writing a program using uVision2 for a 8052 developement kit.

problem no.1: I have a Waveform of unknown freq from a swipe card which has TTL voltage of 0 and 5v. we need to design a program using C to count the time between the very 1st 2 high voltage
(1st 2 high V)

problem no.2: Next we hav to decode the waveform using a table. Basically its a Magnetic Swipecard we hav to decode, track 2 (eg 411557, 5bits per character)

half the program has been written so far but we can;t seem to output it to the LCD display...


HELP ME ANYONE PLEASE!!!...
Desperate.
ps: any qns, pls feel free to email me
arelius@visto.com

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