This the example of buzzer interfacing code

Buzzer Example\Abstract.txt
..............\Blinky.c
..............\Blinky.uvgui
..............\Blinky.uvgui.AbdulMoeez
..............\Blinky.uvgui_AbdulMoeez.bak
..............\Blinky.uvopt
..............\Blinky.uvproj
..............\Blinky_STM32F407 Flash.dep
..............\Blinky_STM32F407 RAM.dep
..............\Blinky_uvopt.bak
..............\Blinky_uvproj.bak
..............\Dbg_RAM.ini
..............\Flash\Blinky.axf
..............\.....\Blinky.build_log.htm
..............\.....\blinky.crf
..............\.....\blinky.d
..............\.....\Blinky.htm
..............\.....\Blinky.lnp
..............\.....\Blinky.map
..............\.....\blinky.o
..............\.....\Blinky.plg
..............\.....\Blinky.sct
..............\.....\Blinky.tra
..............\.....\ExtDll.iex
..............\.....\led.crf
..............\.....\led.d
..............\.....\led.o
..............\.....\startup_stm32f40xx.d
..............\.....\startup_stm32f40xx.lst
..............\.....\startup_stm32f40xx.o
..............\.....\system_stm32f4xx.crf
..............\.....\system_stm32f4xx.d
..............\.....\system_stm32f4xx.o
..............\RAM\Blinky.axf
..............\...\Blinky.build_log.htm
..............\...\blinky.crf
..............\...\blinky.d
..............\...\Blinky.htm
..............\...\Blinky.lnp
..............\...\Blinky.map
..............\...\blinky.o
..............\...\Blinky.sct
..............\...\startup_stm32f40xx.d
..............\...\startup_stm32f40xx.lst
..............\...\startup_stm32f40xx.o
..............\...\system_stm32f4xx.crf
..............\...\system_stm32f4xx.d
..............\...\system_stm32f4xx.o
..............\startup_stm32f40xx.s
..............\system_stm32f4xx.c
..............\Flash
..............\RAM
Buzzer Example

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