stm32蜂鸣器程序代码
时间: 2023-07-20 07:29:58 浏览: 75
下面是一个简单的使用STM32的TIM定时器控制蜂鸣器的程序代码,使用的是PWM输出方式:
```
#include "stm32f10x.h"
#define BEEP_GPIO_CLK RCC_APB2Periph_GPIOB
#define BEEP_GPIO_PORT GPIOB
#define BEEP_GPIO_PIN GPIO_Pin_8
void TIM3_PWM_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(BEEP_GPIO_CLK, ENABLE);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Pin = BEEP_GPIO_PIN;
GPIO_Init(BEEP_GPIO_PORT, &GPIO_InitStructure);
}
void TIM3_PWM_Init(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
TIM_TimeBaseStructure.TIM_Period = 999;
TIM_TimeBaseStructure.TIM_Prescaler = 71;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 500;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC2Init(TIM3, &TIM_OCInitStructure);
TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);
TIM_ARRPreloadConfig(TIM3, ENABLE);
TIM_Cmd(TIM3, ENABLE);
}
int main(void)
{
TIM3_PWM_GPIO_Init();
TIM3_PWM_Init();
while (1)
{
}
}
```
在程序中,我们使用TIM3的PWM输出控制蜂鸣器。在TIM3_PWM_GPIO_Init函数中,初始化GPIOB的8号引脚为复用推挽输出模式,并且开启GPIOB的时钟。在TIM3_PWM_Init函数中,我们配置了TIM3的计数频率为1MHz,PWM输出频率为1kHz,占空比为50%。在main函数中,我们只是让程序在一个死循环中运行,实际上可以根据需要在事件中触发蜂鸣器的控制。