stm32 pwm输出正弦波
时间: 2023-09-29 20:02:12 浏览: 87
你可以使用STM32的定时器和DAC功能来实现PWM输出正弦波。首先,你需要开启定时器,然后使用SineWave_Data函数生成正弦波的数据,并将其传输到DAC通道。以下是一个示例代码:
```c
// 开启定时器
HAL_TIM_Base_Start(&htim6);
// 生成正弦波的点数函数
void SineWave_Data(uint16_t num, uint16_t *D, float U) {
float Pi = 3.1415926;
for (uint16_t i = 0; i < num; i++) {
D[i = (uint16_t)((U * sin((1.0 * i / (num - 1)) * 2 * Pi)) * 4095 / 3.3);
}
}
// 设置正弦波的点数和输出电压峰值
uint16_t num = 100; // 正弦波的点数
float U = 1.5; // 输出电压峰值(0~1.5V)
uint16_t DualSine12bit[num];
// 生成正弦波数据
SineWave_Data(num, DualSine12bit, U);
// 启动DAC通道,输出正弦波
HAL_DAC_Start_DMA(&hdac, DAC_CHANNEL_1, (uint32_t *)DualSine12bit, num, DAC_ALIGN_12B_R);
```
这段代码将会使用定时器TIM6和DAC通道1来输出一个包含100个点的正弦波。你可以根据需要调整点数和输出电压峰值。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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