stm32 pwm接收程序

您好！针对您的问题，这是一个使用STM32的PWM接收程序的示例代码：

#include "stm32f4xx.h"

void TIM4_IRQHandler(void)
{
    if (TIM_GetITStatus(TIM4, TIM_IT_CC1) != RESET)
    {
        // 在此处处理接收到PWM信号的逻辑
        // 例如读取捕获寄存器的值来获取PWM信号的占空比等信息
        uint16_t capturedValue = TIM_GetCapture1(TIM4);
        
        // 清除中断标志位
        TIM_ClearITPendingBit(TIM4, TIM_IT_CC1);
    }
}

int main(void)
{
    // 初始化GPIO和定时器
    // ...

    // 配置定时器为输入捕获模式
    TIM_ICInitTypeDef TIM_ICInitStructure;
    TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
    TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
    TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
    TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
    TIM_ICInitStructure.TIM_ICFilter = 0x0;
    TIM_ICInit(TIM4, &TIM_ICInitStructure);

    // 使能定时器中断
    NVIC_InitTypeDef NVIC_InitStructure;
    NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    // 使能定时器
    TIM_Cmd(TIM4, ENABLE);

    while (