stm32pwm控制蜂鸣器发出音乐示例代码
时间: 2023-10-06 20:10:48 浏览: 50
好的,以下是一个使用 STM32 的 PWM 控制蜂鸣器发出音乐的示例代码:
```
#include "stm32f10x.h"
//定义乐曲数组
unsigned int music[] =
{
262, 294, 330, 349, 392, 440, 494,
523, 880, 494, 523, 440, 392, 349,
330, 262, 330, 294, 262, 262, 330,
330, 330, 349, 392, 392, 349, 330,
294, 262, 262, 294, 294, 330, 262,
294, 330, 349, 392, 440, 494, 523,
262, 392, 392, 440, 440, 494, 392,
330, 262, 294, 262, 330, 392, 440,
494, 523, 587, 659, 698, 784, 880,
262, 294, 330, 349, 392, 440, 494,
523, 880, 494, 523, 440, 392, 349,
330, 262, 330, 294, 262, 262, 330,
330, 330, 349, 392, 392, 349, 330,
294, 262, 262, 294, 294, 330, 262,
294, 330, 349, 392, 440, 494, 523,
262, 392, 392, 440, 440, 494, 392,
330, 262, 294, 262, 330, 392, 440,
494, 523, 587, 659, 698, 784, 880,
};
int main()
{
//初始化 GPIO 和 PWM 设置
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
TIM_TimeBaseInitTypeDef TIM_TimeBase_InitStructure;
TIM_TimeBase_InitStructure.TIM_Period = 500;
TIM_TimeBase_InitStructure.TIM_Prescaler = 72;
TIM_TimeBase_InitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBase_InitStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBase_InitStructure);
TIM_OCInitTypeDef TIM_OC_InitStructure;
TIM_OC_InitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OC_InitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OC_InitStructure.TIM_Pulse = 0;
TIM_OC_InitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC1Init(TIM2, &TIM_OC_InitStructure);
//播放乐曲
while(1)
{
for(int i = 0; i < sizeof(music)/sizeof(unsigned int); i++)
{
//设置 PWM 占空比和频率
int period = 72000000 / (72 * music[i]);
TIM_SetAutoreload(TIM2, period);
TIM_SetCompare1(TIM2, period / 2);
//短暂延时以控制节奏
for(int j = 0; j < 10000; j++);
//静音
TIM_SetCompare1(TIM2, 0);
}
}
return 0;
}
```
这段代码使用了 STM32 的 PWM 功能来产生蜂鸣器的声音,在 main 函数中播放了一个储存在 music 数组中的乐曲。关于如何连接蜂鸣器到 STM32,可以参考相应的硬件连接图。