STM32定时器四通道捕获求助

2023-01-13

本文主要是 STM32定时器四通道捕获求助 相关的知识问答，如果你也了解，请帮忙补充。

参考知识1 #include"CAM.h"
#define TIMER TIM2

void init_tim2_cam(u16 psc, u16 arr, u8 way, u8 dir)

RCC->APB1ENR |= 1 << 0; //使能定时器2时钟
RCC->APB2ENR |= 1 << 2; //使能PortA

switch (way)

case 1:
GPIOA->CRL &= 0xfffffff0;
GPIOA->CRL |= 0x00000008;
break;
case 2:
GPIOA->CRL &= 0xffffff00;
GPIOA->CRL |= 0x00000088;
break;
case 3:
GPIOA->CRL &= 0xfffff000;
GPIOA->CRL |= 0x00000888;
break;
case 4:
GPIOA->CRL &= 0xffff0000;
GPIOA->CRL |= 0x00008888;
break;


TIMER->PSC = psc;
TIMER->ARR = arr;

switch (way)

case 4:
TIMER->CCMR2 |= 1 << 8;
if (dir == 0)
TIMER->CCER |= 1 << 13; //下降沿捕获
else
TIMER->CCER &= ~(1 << 13); //上升沿捕获
TIMER->CCER |= 1 << 12;
TIMER->DIER |= 1 << 4;
case 3: //CCR3 PA2
TIMER->CCMR2 |= 1 << 0;
if (dir == 0)
TIMER->CCER |= 1 << 9; //下降沿捕获
else
TIMER->CCER &= ~(1 << 9); //上升沿捕获
TIMER->CCER |= 1 << 8;
TIMER->DIER |= 1 << 3;
case 2: //CCR2 PA1
TIMER->CCMR1 |= 1 << 8; //CCR2配置通道方向:输入
if (dir == 0)
TIMER->CCER |= 1 << 5; //下降沿捕获
else
TIMER->CCER &= ~(1 << 5); //上升沿捕获
TIMER->CCER |= 1 << 4; //CCR2通道捕获使能
TIMER->DIER |= 1 << 2; //CCR2通道允许捕获中断
case 1: //>CCR1 PA0
TIMER->CCMR1 |= 1 << 0; //CCR1配置通道方向：输入
if (dir == 0)
TIMER->CCER |= 1 << 1; //下降沿捕获
else
TIMER->CCER &= ~(1 << 1); //上升沿捕获
TIMER->CCER |= 1 << 0; //CCR1捕获使能
TIMER->DIER |= 1 << 1; //CCR1通道允许捕获中断
break;

TIMER->DIER |= 1 << 0; //允许更新中断
MY_NVIC_Init(1, 2, TIM2_IRQChannel, 2); //中断
TIMER->CR1 = 0x01; //使能定时器
TIMER->SR &= ~(1 << 0);


以前写的头文件 可以配置定时器2的四路捕获，你参考下嘛，可以正常工作的转载，仅供参考。本回答被提问者和网友采纳