OK2440 development board application, realize the button control a buzzer response.

7.1 key-bell\Init.s
............\main.c
............\OK2440_Keyboard.mcp
............\..............._Data\CWSettingsWindows.stg
............\....................\Debug\TargetDataWindows.tdt
............\....................\.....Rel\ObjectCode\Init.o
............\....................\........\..........\main.o
............\....................\........\OK2440_Keyboard.axf
............\....................\........\OK2440_Keyboard.bin
............\....................\........\TargetDataWindows.tdt
............\....................\Release\TargetDataWindows.tdt
............\....................\DebugRel\ObjectCode
............\....................\Debug
............\....................\DebugRel
............\....................\Release
............\OK2440_Keyboard_Data
7.1 key-bell

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