蓝桥杯嵌入式——TIM.输出比较 and 输入捕获

一、基本资料

1. 快速编写：6-STM32固件库代码V3.5版\stm32f10x_stdperiph_lib\STM32F10x_StdPeriph_Lib_V3.5.0\Project\STM32F10x_StdPeriph_Examples\TIM*输出比较：PWM_Output或者OCToggle* 输入捕获：InputCapture
2. 中断服务函数在同目录下的stm32f10x_it.h中
3. 计算时间是多少ms用下面的公式，
   例如50ms=（（499+0）*（7199+1））/72

TimeOut = （（Prescaler + 1） * （Period + 1） ） / TimeClockFren;

二、主要代码

tim.c

#include "tim.h"

void TIM2_Init(unsigned short arr,unsigned short psc)
{
	TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
	TIM_ICInitTypeDef  TIM_ICInitStructure;
	GPIO_InitTypeDef GPIO_InitStructure;
	NVIC_InitTypeDef NVIC_InitStructure;

	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);

	GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_8 | GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

	TIM_TimeBaseStructure.TIM_Period = arr;
    TIM_TimeBaseStructure.TIM_Prescaler = psc;
    TIM_TimeBaseStructure.TIM_ClockDivision = 0;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
	TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

    TIM_ICInitStructure.TIM_Channel = TIM_Channel_2;
    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(TIM3, &TIM_ICInitStructure);

	TIM_ICInitStructure.TIM_Channel = TIM_Channel_1;
    TIM_ICInit(TIM3, &TIM_ICInitStructure);
   
    /* TIM enable counter */
    TIM_Cmd(TIM3, ENABLE);

    /* Enable the CC2 Interrupt Request */
    TIM_ITConfig(TIM3, TIM_IT_Update|TIM_IT_CC2|TIM_IT_CC1, ENABLE);
}

void TIM3_Init(unsigned short arr,unsigned short psc)
{
	TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
	TIM_OCInitTypeDef  TIM_OCInitStructure;	
	GPIO_InitTypeDef GPIO_InitStructure;
	NVIC_InitTypeDef NVIC_InitStructure;

	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
	
	GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_6 | GPIO_Pin_7;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

	TIM_TimeBaseStructure.TIM_Period = arr;
    TIM_TimeBaseStructure.TIM_Prescaler = psc;
    TIM_TimeBaseStructure.TIM_ClockDivision = 0;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

    /* PWM1 Mode configuration: Channel1 */
    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
//    TIM_OCInitStructure.TIM_Pulse = CCR1_Val;
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

    TIM_OC1Init(TIM3, &TIM_OCInitStructure);

    TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);

    /* PWM1 Mode configuration: Channel2 */
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
//    TIM_OCInitStructure.TIM_Pulse = CCR2_Val;

    TIM_OC2Init(TIM3, &TIM_OCInitStructure);

    TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);	   

	TIM_ITConfig(TIM3, TIM_IT_CC1 | TIM_IT_CC2 , ENABLE);

}

tim.h

#ifndef  __TIM_H_
#define  __TIM_H_

#include "stm32f10x.h"

void TIM2_Init(unsigned short arr,unsigned short psc);		
void TIM3_Init(unsigned short arr,unsigned short psc);

#endif

三、文献参考
1.Zach_z作者代码
2.（1）fei…作者代码
2.(2)作者代码
3.NanKing-芒果作者代码
4.ReCclay作者代码