使用stm32cube型号为stm32f407vet6输出正弦波

您可以使用STM32Cube软件包中的库函数来生成正弦波。以下是一个基本的示例代码，用于生成正弦波并将其输出到DAC通道：

#include "stm32f4xx.h"
#include "stm32f4xx_hal.h"

#define DAC_CHANNEL DAC_CHANNEL_1

#define DAC_RESOLUTION 4095
#define DAC_AMPLITUDE (DAC_RESOLUTION / 2)
#define DAC_FREQUENCY 1000 // 正弦波频率，单位为Hz
#define DAC_SAMPLE_RATE 10000 // DAC采样率，单位为Hz
#define DAC_BUFFER_SIZE (DAC_SAMPLE_RATE / DAC_FREQUENCY)

// 正弦波表
const uint16_t sineWave[DAC_BUFFER_SIZE] = {
    2047, 2447, 2831, 3185, 3495, 3750, 3939, 4056, 4095, 4056, 3939, 3750,
    3495, 3185, 2831, 2447, 2047, 1647, 1263, 909, 599, 344, 155, 38, 0, 38,
    155, 344, 599, 909, 1263, 1647
};

DAC_HandleTypeDef hdac;

// 初始化DAC
void DAC_Init(void)
{
    DAC_ChannelConfTypeDef sConfig;

    // 使能DAC时钟
    __HAL_RCC_DAC_CLK_ENABLE();

    hdac.Instance = DAC;
    HAL_DAC_Init(&hdac);

    sConfig.DAC_Trigger = DAC_TRIGGER_NONE;
    sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;

    HAL_DAC_ConfigChannel(&hdac, &sConfig, DAC_CHANNEL);
}

// 启动DAC
void DAC_Start(void)
{
    HAL_DAC_Start(&hdac, DAC_CHANNEL);
}

// 设置DAC输出值
void DAC_SetValue(uint16_t value)
{
    HAL_DAC_SetValue(&hdac, DAC_CHANNEL, DAC_ALIGN_12B_R, value);
}

// 生成正弦波
void GenerateSineWave(void)
{
    uint32_t i = 0;

    while (1)
    {
        DAC_SetValue(sineWave[i]);

        i++;
        if (i == DAC_BUFFER_SIZE)
        {
            i = 0;
        }

        HAL_Delay(1000 / DAC_SAMPLE_RATE);
    }
}

int main(void)
{
    HAL_Init();
    DAC_Init();
    DAC_Start();
    GenerateSineWave();

    while (1)
    {
    }
}

请注意，此示例代码将正弦波输出到DAC通道1。您可以根据需要进行修改。此外，确保您已正确配置系统时钟和DAC引脚。