stm32f407 正弦波过零捕获
时间: 2023-07-30 17:04:09 浏览: 220
对于STM32F407微控制器,可以通过使用定时器的输入捕获功能来实现正弦波过零捕获。下面是一个简单的示例代码:
```c
#include "stm32f4xx.h"
// 定义输入捕获相关参数
TIM_HandleTypeDef htim;
TIM_IC_InitTypeDef sConfig;
// 正弦波过零捕获回调函数
void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim)
{
if (htim->Channel == HAL_TIM_ACTIVE_CHANNEL_1)
{
// 在这里处理正弦波过零的逻辑
// ...
}
}
int main(void)
{
// 初始化定时器和GPIO引脚
// ...
// 配置输入捕获
sConfig.ICPolarity = TIM_ICPOLARITY_RISING; // 上升沿触发
sConfig.ICSelection = TIM_ICSELECTION_DIRECTTI;
sConfig.ICPrescaler = TIM_ICPSC_DIV1;
sConfig.ICFilter = 0;
HAL_TIM_IC_ConfigChannel(&htim, &sConfig, TIM_CHANNEL_1);
// 注册输入捕获回调函数
HAL_TIM_IC_Start_IT(&htim, TIM_CHANNEL_1);
while (1)
{
// 主循环
// ...
}
}
```
上述代码中,我们使用`HAL_TIM_IC_CaptureCallback`函数作为输入捕获的回调函数,在回调函数中可以处理正弦波过零的逻辑。请根据你的具体需求进行适当的修改和补充。
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