Week Ligong development board, lpc2292 external interrupt realize the experiment, through experiments me audible signal device and infrared sending- receiving pipe through the external interrupt realize the sound generator.

Interrupt
.........\EXTINT
.........\......\extint.c
.........\......\extint.h
.........\Hex Files
.........\.........\interrupt.hex
.........\Interrupt.mcp
.........\Interrupt_Data
.........\..............\CWSettingsWindows.stg
.........\..............\Debug
.........\..............\DebugRel
.........\..............\........\TargetDataWindows.tdt
.........\..............\Release
.........\LED
.........\...\Led.c
.........\...\Led.h
.........\Main
.........\....\main.c
.........\Sounder
.........\.......\sounder.c
.........\.......\sounder.h
.........\startcode
.........\.........\config.h
.........\.........\Desktop.ini
.........\.........\heap.s
.........\.........\IRQ.s
.........\.........\LPC2200.h
.........\.........\stack.s
.........\.........\Startup.s
.........\.........\target.c
.........\.........\target.h

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