LPC2131 board buzzer debugging development process, phenomenon, intermittent buzzer sound

12313\led test.hex
.....\led test.mcp
.....\..._test_Data\CWSettingsWindows.stg
.....\.............\DebugInFLASH\led test.axf
.....\.............\............\led test.i32
.....\.............\............\ObjectCode\IRQ.o
.....\.............\............\..........\main.o
.....\.............\............\..........\Startup.o
.....\.............\............\..........\target.o
.....\.............\............\TargetDataWindows.tdt
.....\.............\.......RAM\led test.axf
.....\.............\..........\led test.i32
.....\.............\..........\ObjectCode\IRQ.o
.....\.............\..........\..........\main.o
.....\.............\..........\..........\Startup.o
.....\.............\..........\..........\target.o
.....\.............\..........\TargetDataWindows.tdt
.....\src\config.h
.....\...\IRQ.s
.....\...\LPC2294.h
.....\...\main.c
.....\...\mem_a.scf
.....\...\mem_b.scf
.....\...\mem_c.scf
.....\...\Startup.s
.....\...\target.c
.....\...\target.h
.....\led_test_Data\DebugInFLASH\ObjectCode
.....\.............\.......RAM\ObjectCode
.....\.............\DebugInFLASH
.....\.............\DebugInRAM
.....\.............\RelInFLASH
.....\led_test_Data
.....\src
12313

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