STM32输入捕获测频率&PWMI测频率占空比

本文待补充，暂只有流程代码

输入捕获

#include "stm32f10x.h"                  // Device header

void IC_Init(void)
{
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
    
    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
    
    TIM_InternalClockConfig(TIM3);
    
    TIM_TimeBaseInitTypeDef TIM_TimBaseInitStructure;
    TIM_TimBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimBaseInitStructure.TIM_Period = 65536 -1;
    TIM_TimBaseInitStructure.TIM_Prescaler = 72 -1;
    TIM_TimBaseInitStructure.TIM_RepetitionCounter =0;
    TIM_TimeBaseInit(TIM3, &TIM_TimBaseInitStructure);
    
    
    
    /*配置输入捕获*/
    TIM_ICInitTypeDef TIM_InitStructure;                                
    TIM_InitStructure.TIM_Channel = TIM_Channel_1;                        //配置通道
    TIM_InitStructure.TIM_ICFilter = 0xF  ;                                //配置滤波
    TIM_InitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;            //极性 配置上升沿触发
    TIM_InitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;                    //触发信号分频器 1分频就是不分配 每次触发都有效果
    TIM_InitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;        //输入信号交叉，选择直通，不交叉
    TIM_ICInit(TIM3, &TIM_InitStructure);
    
    /*配置主从模式*/
    TIM_SelectInputTrigger(TIM3,TIM_TS_TI1FP1);                            //配置触发源
    TIM_SelectSlaveMode(TIM3,TIM_SlaveMode_Reset);                        //配置从模式
    
    TIM_Cmd(TIM3,ENABLE);
}

/*获取频率*/
uint32_t IC_GetFreq(void)
{
        return 1000000 / (TIM_GetCapture1(TIM3) + 1);                   //可删除1不影响代码
}

PWMI

#include "stm32f10x.h"                  // Device header

void IC_Init(void)
{
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
    
    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
    
    TIM_InternalClockConfig(TIM3);
    
    TIM_TimeBaseInitTypeDef TIM_TimBaseInitStructure;
    TIM_TimBaseInitStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimBaseInitStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimBaseInitStructure.TIM_Period = 65536 -1;
    TIM_TimBaseInitStructure.TIM_Prescaler = 72 -1;
    TIM_TimBaseInitStructure.TIM_RepetitionCounter =0;
    TIM_TimeBaseInit(TIM3, &TIM_TimBaseInitStructure);
    
    
    
    /*配置输入捕获*/
    TIM_ICInitTypeDef TIM_InitStructure;                                
    TIM_InitStructure.TIM_Channel = TIM_Channel_1;                        //配置通道
    TIM_InitStructure.TIM_ICFilter = 0xF  ;                                //配置滤波
    TIM_InitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;            //极性 配置上升沿触发
    TIM_InitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;                    //触发信号分频器 1分频就是不分配 每次触发都有效果
    TIM_InitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;        //输入信号交叉，选择直通，不交叉
    TIM_ICInit(TIM3, &TIM_InitStructure);
    /*简化步骤，配置一条与上面代码不同通道的TIM_Channel和TIM_ICPolarity 实现交叉模式*/
    TIM_PWMIConfig(TIM3, &TIM_InitStructure); 
    
    /*配置主从模式*/
    TIM_SelectInputTrigger(TIM3,TIM_TS_TI1FP1);                            //配置触发源
    TIM_SelectSlaveMode(TIM3,TIM_SlaveMode_Reset);                        //配置从模式
    
    TIM_Cmd(TIM3,ENABLE);
}
/*获取频率*/
uint32_t IC_GetFreq(void)
{
    return 1000000 / (TIM_GetCapture1(TIM3) + 1);
}
/*获取占空比*/
uint16_t IC_GetDuty(void)
{
    return (TIM_GetCapture2(TIM3) + 1) * 100 / (TIM_GetCapture1(TIM3) + 1);
}