PIC microcontroller with internal timer 0, as the 16-bit timer, and turn overflow interrupt. External microcontroller interrupt 0 pin is connected to the switch SW2, and set on the falling edge of the trigger. Be timed button press 0SW2 displayed when " Timer0 Start" , Timer 0 start working, LED display counting seconds, Timer 0 stops working and then press SW2 button displayed on the LCD " Timer0 Stop" , and the LCD displays the number of seconds, when pressed SW3, the display is reset.

S_Watch\18f452i.lkr
.......\ex4.c
.......\Ex4.cod
.......\Ex4.cof
.......\ex4.err
.......\Ex4.hex
.......\Ex4.lst
.......\Ex4.mcp
.......\Ex4.mcs
.......\ex4.mcw
.......\Ex4.mptags
.......\ex4.o
.......\Ex4.tagsrc
.......\P18F_LCD.h
.......\untitled.mcw
.......\WAP_LCD.c
.......\WAP_LCD.o
......._proteus\Last Loaded s_watch.DBK
...............\s_watch.DSN
...............\s_watch.PWI
S_Watch
S_Watch_proteus

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