Welcome to Self-balancing Robot Car repository
03.Buzzer control(GPIO)
Buzzer control
Buzzer controlHardware connectionControl principleSoftware configurationPin definitionSoftware codeControl functionExperimental phenomenon
Tutorial on controlling the buzzer to sound.
The tutorial only introduces the standard library project code
Hardware connection
| Peripherals | Development board |
|---|---|
| Buzzer (active buzzer) | PA11 |
Control principle
| Buzzer | Features |
|---|---|
| Active buzzer | Internal oscillation source, high and low levels can control the sound, the sound frequency is fixed |
| Passive buzzer | Internal oscillation source is not provided, different oscillation pulse frequencies can be provided to emit different frequency sounds |
| Control pin | Output level | LED effect |
|---|---|---|
| PA11 | Output low level | Buzzer does not sound |
| PA11 | Output high level | Buzzer sounds |
Software configuration
Pin definition
| Main control chip | Pin | Main function (after reset) | Default multiplexing function | Redefine function |
|---|---|---|---|---|
| STM32F103RCT6 | PA11 | PA11 | USART1_CTS/USBDM/CAN_RX/TIM1_CH4 |
Software code
The default function of the PA11 pin is a normal IO pin function.
xxxxxxxxxxProduct supporting data source code path: Attachment → Source code summary → 1.Base_Course → 3.Beep
Control function
The tutorial only briefly introduces the code, you can open the project source code to read it.
Init_Beep
xxxxxxxxxxvoid Init_Beep(void){GPIO_InitTypeDef GPIO_InitStructure;RCC_APB2PeriphClockCmd(BEEP_RCC, ENABLE);GPIO_InitStructure.GPIO_Pin = BEEP_PIN;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;GPIO_Init(BEEP_PORT, &GPIO_InitStructure);BEEP_BEEP = 0;}
Experimental phenomenon
The BEEP.hex file generated by the project compilation is located in the OBJ folder of the Beep project. Find the BEEP.hex file corresponding to the project and use the FlyMcu software to download the program into the development board.
After the program is downloaded successfully, the buzzer switches its sounding state every 500ms.