stm32f103vet6蜂鸣器音乐

要在STM32F103VE上播放音乐，可以使用蜂鸣器作为输出设备。以下是一个简单的示例程序，可以在STM32F103VE上播放“Mary Had a Little Lamb”的曲调：

#include "stm32f10x.h"

// 定义曲调
#define NOTE_C4  382
#define NOTE_D4  340
#define NOTE_E4  303
#define NOTE_F4  286
#define NOTE_G4  255
#define NOTE_A4  227
#define NOTE_B4  202

// 定义时间
#define Q 600
#define H 1200

// 定义曲谱
uint16_t melody[] = {
  NOTE_E4, NOTE_D4, NOTE_C4, NOTE_D4, NOTE_E4, NOTE_E4, NOTE_E4,
  NOTE_D4, NOTE_D4, NOTE_D4, NOTE_E4, NOTE_G4, NOTE_G4,
  NOTE_E4, NOTE_D4, NOTE_C4, NOTE_D4, NOTE_E4, NOTE_E4, NOTE_E4,
  NOTE_E4, NOTE_D4, NOTE_D4, NOTE_E4, NOTE_D4, NOTE_C4
};

uint16_t noteDurations[] = {
  Q, Q, Q, Q, Q, Q, H,
  Q, Q, Q, Q, Q, H,
  Q, Q, Q, Q, Q, Q, H,
  Q, Q, Q, Q, Q, H
};

void delay_us(uint32_t nus)
{
    uint32_t temp;
    SysTick->LOAD = 9*nus;
    SysTick->VAL = 0;
    SysTick->CTRL = 0x01;
    do {
        temp = SysTick->CTRL;
    } while ((temp & 0x01) && (!(temp & (1 << 16))));
    SysTick->CTRL = 0x00;
    SysTick->VAL = 0;
}

void delay_ms(uint32_t nms)
{
    uint32_t temp;
    SysTick->LOAD = 9000*nms;
    SysTick->VAL = 0;
    SysTick->CTRL = 0x01;
    do {
        temp = SysTick->CTRL;
    } while ((temp & 0x01) && (!(temp & (1 << 16))));
    SysTick->CTRL = 0x00;
    SysTick->VAL = 0;
}

int main(void)
{
    // 初始化SysTick定时器
    SysTick->CTRL = 0;
    SysTick->LOAD = 0xffffff;
    SysTick->VAL = 0;
    SysTick->CTRL = 5;

    // 初始化GPIO口
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOC, &GPIO_InitStructure);

    // 播放曲调
    for (int i = 0; i < sizeof(melody) / sizeof(uint16_t); i++) {
        uint16_t noteDuration = noteDurations[i];
        uint32_t delayTime = noteDuration * 1000 / melody[i];
        for (int j = 0; j < delayTime; j++) {
            GPIO_SetBits(GPIOC, GPIO_Pin_13);
            delay_us(melody[i] / 2);
            GPIO_ResetBits(GPIOC, GPIO_Pin_13);
            delay_us(melody[i] / 2);
        }
        delay_ms(noteDuration * 0.3);
    }

    while (1) {
    }
}

这个程序使用SysTick定时器来生成延迟，然后使用GPIO口控制蜂鸣器。在循环中，它遍历曲调和持续时间数组，并使用延迟计算出每个音符播放的时间。然后，它使用GPIO口控制蜂鸣器播放音符。