Programming examples of stm32f1 and stm32subeide - production melody of PWM driven buzzer

PWM Drive buzzer to produce melody

Buzzer or buzzer is an audio signal device , It can be mechanical 、 Electromechanical or piezoelectric （ Piezoelectric for short ）. Its main function is to convert the signal from audio to sound . Generally, it is powered by DC voltage , For timer 、 a burglar alarm 、 The printer 、 a burglar alarm 、 Computer, etc. . According to different designs , It can produce different sounds , Like an alarm clock 、 music 、 Bells and sirens .

Buzzer is divided into active buzzer and passive buzzer . This example uses a passive buzzer , As shown in the figure above .

1、 Buzzer configuration

Development environment construction 、 System clock configuration 、 Debugging configuration and serial port configuration , Please refer to ：

• STM32F1 And STM32CubeIDE Quick start - Development environment construction
• STM32F1 And STM32CubeIDE Quick start -GPIO Overview and lighting LED
• STM32F1 And STM32CubeIDE Quick start -USART/UART Serial port communication

This instance passes the PWM Function driven buzzer . By designation PWM Output time length and adjustment PWM output frequency , Generate different sounds （ melody ）. The configuration is as follows ：