USE OF PIC18F4520 INTERNAL TIMERS FOR
TIME KEEPING APPLICATIONS
LAB REPORT
Timers are frequently needed in control oriented applications. The
basic function of timers is to time an application and generate a
delay. PIC 18F4520 has 4 programmable timers which can be used
in many tasks. In this lab, we developed a program that uses two
timers simultaneously to time an application and count at the same
time. We used timer-0 and timer-1 for this purpose. Timer-0 can be
used in either 16 bit or 8 bit mode while timer-1 is a 16 bit timer.
We used timer-0 in 8 bit mode to make an LED go on and off
periodically after 0.5 sec delay. At the same time we used timer-1
in 16 bit mode count from 0 to 59 sec and then reset .We did the
counting in two digit BCD code. We displayed the LED on port C
of microcontroller. To display the seconds count we send the
output on port D and displayed it on segment of trainer.
USE OF PIC18F4520 INTERNAL TIMERS FOR
TIME KEEPING APPLICATIONS
LAB REPORT
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