stm32蜂鸣器程序代码
时间: 2023-09-20 21:09:05 浏览: 96
以下是使用STM32的定时器和GPIO来控制蜂鸣器的示例代码:
```c
#include "stm32f10x.h"
void Delay(__IO uint32_t nCount);
int main(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
// 使能GPIOB和TIM3时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
// 将PB0配置为推挽输出
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
// 配置TIM3为PWM模式1,频率为1kHz
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);
// 配置TIM3通道1为PWM输出
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 0;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init(TIM3, &TIM_OCInitStructure);
// 启动TIM3
TIM_Cmd(TIM3, ENABLE);
while (1)
{
// 使能蜂鸣器
TIM_SetCompare1(TIM3, 500);
Delay(100);
// 关闭蜂鸣器
TIM_SetCompare1(TIM3, 0);
Delay(100);
}
}
// 简单的延时函数
void Delay(__IO uint32_t nCount)
{
for (; nCount != 0; nCount--);
}
```
在此示例中,我们使用PB0引脚控制蜂鸣器,使用TIM3输出PWM信号来控制蜂鸣器的声音。在主循环中,我们交替在蜂鸣器上产生500Hz的PWM信号和关闭蜂鸣器,以模拟蜂鸣器响声的效果。
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