28-5个外中断测试
................\EXTI.Opt
................\EXTI.Uv2
................\EXTI.plg
................\EXTI_Uv2.Bak
................\Exti.c
................\Exti.h
................\STC15Fxxxx.H
................\config.h
................\list
................\....\EXTI
................\....\EXTI.hex
................\....\EXTI.lnp
................\....\EXTI.plg
................\main.c
................\timer.c
................\timer.h