Create the prototype of metronome
Create the prototype of buzzer beep function
Finish the basic implementation of metronome (Need to write the hardware driver)
Rename the metronome_beat_count variable
Create the tuner task
Merge branch 'metronome' into UI
FFT for 1024 points of data
Create testing data for fft_1024
Using fft_1024 in tuner task
Add path of library but not working
Define ARM_MATH_CM4 marco in Makefile
Add correspond file to Makefile
Add ui_metronome_task, and ui_draw_beat

TODO:
    change to double buffer
fix typo
Add the prototype of semaphore
Modify the argument definition semaphore's prototype function
Create new task block status for semaphore
Try to implement signal and wait function
Merge branch 'semaphore' of https://github.com/rtenv-plus-stm32f4/rtenv-plus-stm32f4
Rearrange the header file