PIC microcontroller internal timer 0 as a 16-bit timer, and open the overflow interrupt. MCU external interrupt 0 pin is connected to switch SW2, and set to the falling edge of the trigger. The microcontroller UART interface operates in full-duplex asynchronous mode, one start bit, 8 data bits, 1 stop bit, baud rate of 9600, and open to receive interrupt communication with the PC. Write a program to achieve functional: SW2 button is pressed, the display on the LCD Timer0 Start " to, timer 0 start work, and then displayed on the LCD Timer0 Working" When UART receives commands sent to the PC, " P" , the timer 0 stop working, the Timer0 Stop " is displayed on the LCD, and the timing time is sent back to the PC. And to use ICD2 emulator for procedural programming and simulation debugging.

中断系统应用
............\18f452i.lkr
............\Ex4.cod
............\Ex4.cof
............\Ex4.hex
............\Ex4.lst
............\Ex4.mcp
............\Ex4.mcs
............\Ex4.mptags
............\Ex4.tagsrc
............\P18F_LCD.h
............\WAP_LCD.c
............\WAP_LCD.o
............\ex4.c
............\ex4.mcw
............\ex4.o
............\untitled.mcw

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