buzzer.py Source Code

The Python source code of buzzer.py is provided for your reference.

'''
Please make sure the buzzer is connected to the correct pins.
The following table describes how to connect the buzzer to the 40-pin header.
-----------------------------------------
Passive Buzzer___Pin Number_____Pin Name
    VCC             1         3.3V Power
    GND             6           GND
    I/O             18          GPIO51
-----------------------------------------
'''

import VisionFive.gpio as GPIO
import time

buzz_pin = 18
ErrOutOfRange = 0

def setup():
    #Configure the direction of buzz_pin as out.
    GPIO.setup(buzz_pin, GPIO.OUT)
    #Configure the voltage level of buzz_pin as high.
    GPIO.output(buzz_pin, GPIO.HIGH)

def pitch_in_check():
    val_in = input('Enter Pitch (200 to 20000): ')
    val = float(val_in)

    if 200 <= val <= 20000:
        return val
    else:
        print('The input data is out of range (200 to 20,000 Hz). Please re-enter.')
        return ErrOutOfRange

def loop(pitch, cycle):
    delay = 1.0 / pitch
    cycle = int((cycle * pitch)/2)

    #Buzzer beeps.
    while cycle >= 0:
        GPIO.output(buzz_pin, GPIO.LOW)
        time.sleep(delay)
        GPIO.output(buzz_pin, GPIO.HIGH)
        time.sleep(delay)

        cycle = cycle - 1

def destroy():
    GPIO.output(buzz_pin, GPIO.HIGH)
    GPIO.cleanup()

if __name__ == '__main__':
    setup()
    try:
        #Input value of pitch (200 to 20,000 Hz).
        pitch = pitch_in_check()
        while pitch == 0:
            pitch = pitch_in_check()

        #Input value of cycle time (seconds).
        cycle_in = input("Enter Cycle (seconds): ")
        cycle = int(cycle_in)

        #The buzzer beeps with the specified pitch and cycle.
        loop(pitch, cycle)
    finally:
        destroy()