输入捕获通道干扰

棒棒糖

#include "led.h"
#include "delay.h"
#include "sys.h"
#include "timer.h"
#include "usart.h"
#include "pid.h"

//ALIENTEK Mini STM32开发板范例代码9
//输入捕获实验   
//技术支持：www.openedv.com
//广州市星翼电子科技有限公司



extern u8  TIM2CH1_CAPTURE_STA; //输入捕获状态    
extern u16 TIM2CH1_CAPTURE_VAL; //输入捕获值


extern u8  TIM2CH2_CAPTURE_STA; //输入捕获状态    
extern u16 TIM2CH2_CAPTURE_VAL; //输入捕获值
 int main(void)
 {
 
u32 temp=0; 
u32 temp1=0; 
NVIC_Configuration();//设置NVIC中断分组2:2位抢占优先级，2位响应优先级  
delay_init();     //延时函数初始化
uart_init(9600); //串口初始化为9600  
LED_Init();   //初始化与LED连接的硬件接口
PID_init();
  TIM1_PWM_Init(7199,0); //不分频。PWM频率=72000/(899+1)=80Khz
  TIM2_Cap_Init(0XFFFF,71); //以1Mhz的频率计数
    while(1)
{

  TIM_SetCompare1(TIM1,72*PID_realize(temp1*1.0));
  TIM_SetCompare2(TIM1,0);
TIM_SetCompare3(TIM1,0);
  TIM_SetCompare4(TIM1,3600);
 

if(TIM2CH1_CAPTURE_STA&0X80)//成功捕获到了一次高电平
{
temp=TIM2CH1_CAPTURE_STA&0X3F;
temp*=65536; //溢出时间总和
temp+=TIM2CH1_CAPTURE_VAL; //得到总的高电平时间
printf("HIGH:%d us\r\n",temp); //打印总的高点平时间

  TIM2CH1_CAPTURE_STA=0; //开启下一次捕获
  }

if(TIM2CH2_CAPTURE_STA&0X80)//成功捕获到了一次高电平
{
temp1 =TIM2CH2_CAPTURE_STA&0X3F;
temp1*=65536; //溢出时间总和
temp1+=TIM2CH2_CAPTURE_VAL; //得到总的高电平时间
printf("HIGH2:%d us\r\n",temp1); //打印总的高点平时间

  TIM2CH2_CAPTURE_STA=0; //开启下一次捕获
  }


}
}

#include "timer.h"
#include "led.h"
#include "usart.h"
#include "sys.h"
//////////////////////////////////////////////////////////////////////////////////  
//本程序只供学习使用，未经作者许可，不得用于其它任何用途
//ALIENTEK Mini STM32开发板
//PWM  驱动代码   
//正点原子@ALIENTEK
//技术论坛:www.openedv.com
//修改日期:2010/12/03
//版本：V1.0
//版权所有，盗版必究。
//Copyright(C) 正点原子 2009-2019
//All rights reserved
//////////////////////////////////////////////////////////////////////////////////  

//PWM输出初始化
//arr：自动重装值
//psc：时钟预分频数
void TIM1_PWM_Init(u16 arr,u16 psc)
{  
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);// 
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA , ENABLE);  //使能GPIO外设时钟使能
                                                             
   //设置该引脚为复用输出功能,输出TIM1 CH1的PWM脉冲波形
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8  | GPIO_Pin_9
| GPIO_Pin_10 | GPIO_Pin_11 ; 
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //复用推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);


TIM_TimeBaseStructure.TIM_Period = arr; //设置在下一个更新事件装入活动的自动重装载寄存器周期的值 80K
TIM_TimeBaseStructure.TIM_Prescaler =psc; //设置用来作为TIMx时钟频率除数的预分频值  不分频
TIM_TimeBaseStructure.TIM_ClockDivision = 0; //设置时钟分割:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位

 
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //选择定时器模式:TIM脉冲宽度调制模式2
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //比较输出使能
TIM_OCInitStructure.TIM_Pulse = 0; //设置待装入捕获比较寄存器的脉冲值
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low  ; //输出极性:TIM输出比较极性高

TIM_OC1Init(TIM1, &TIM_OCInitStructure);  //根据TIM_OCInitStruct中指定的参数初始化外设TIMx
TIM_OC2Init(TIM1, &TIM_OCInitStructure);  //根据TIM_OCInitStruct中指定的参数初始化外设TIMx
TIM_OC3Init(TIM1, &TIM_OCInitStructure);  //根据TIM_OCInitStruct中指定的参数初始化外设TIMx
TIM_OC4Init(TIM1, &TIM_OCInitStructure);  //根据TIM_OCInitStruct中指定的参数初始化外设TIMx

  TIM_CtrlPWMOutputs(TIM1,ENABLE); //MOE 主输出使能

TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);  //CH1预装载使能
  TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);  //CH1预装载使能  
  TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);  //CH1预装载使能  
  TIM_OC4PreloadConfig(TIM1, TIM_OCPreload_Enable);  //CH1预装载使能  


TIM_ARRPreloadConfig(TIM1, ENABLE); //使能TIMx在ARR上的预装载寄存器

TIM_Cmd(TIM1, ENABLE);  //使能TIM1
 
   
}

//定时器2通道1输入捕获配置

TIM_ICInitTypeDef  TIM2_ICInitStructure;

void TIM2_Cap_Init(u16 arr,u16 psc)
{  
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
  NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); //使能TIM2时钟
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);  //使能GPIOA时钟

GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3;  //PA0 清除之前设置  
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; //PA0 输入  
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_ResetBits(GPIOA,GPIO_Pin_0); //PA0 下拉

//初始化定时器2 TIM2  
TIM_TimeBaseStructure.TIM_Period = arr; //设定计数器自动重装值 
TIM_TimeBaseStructure.TIM_Prescaler =psc; //预分频器   
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //设置时钟分割:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIM向上计数模式
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); //根据TIM_TimeBaseInitStruct中指定的参数初始化TIMx的时间基数单位
  
//初始化TIM2输入捕获参数
TIM2_ICInitStructure.TIM_Channel = TIM_Channel_1; //CC1S=01 选择输入端 IC1映射到TI1上
  TIM2_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //上升沿捕获
  TIM2_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //映射到TI1上
  TIM2_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; //配置输入分频,不分频 
  TIM2_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 配置输入滤波器 不滤波
  TIM_ICInit(TIM2, &TIM2_ICInitStructure);

  TIM2_ICInitStructure.TIM_Channel = TIM_Channel_2;
 TIM2_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //上升沿捕获
  TIM2_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //映射到TI1上
  TIM2_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; //配置输入分频,不分频 
  TIM2_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 配置输入滤波器 不滤波
  TIM_ICInit(TIM2, &TIM2_ICInitStructure);

 TIM2_ICInitStructure.TIM_Channel = TIM_Channel_3;
TIM2_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //上升沿捕获
  TIM2_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //映射到TI1上
  TIM2_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; //配置输入分频,不分频 
  TIM2_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 配置输入滤波器 不滤波
  TIM_ICInit(TIM2, &TIM2_ICInitStructure);

 TIM2_ICInitStructure.TIM_Channel = TIM_Channel_4;
 TIM2_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising; //上升沿捕获
  TIM2_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI; //映射到TI1上
  TIM2_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1; //配置输入分频,不分频 
  TIM2_ICInitStructure.TIM_ICFilter = 0x00;//IC1F=0000 配置输入滤波器 不滤波
  TIM_ICInit(TIM2, &TIM2_ICInitStructure);


//中断分组初始化
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;  //TIM2中断
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;  //先占优先级2级
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;  //从优先级0级
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能
NVIC_Init(&NVIC_InitStructure);  //根据NVIC_InitStruct中指定的参数初始化外设NVIC寄存器 

TIM_ITConfig(TIM2,TIM_IT_Update|TIM_IT_CC1,ENABLE);//允许更新中断 ,允许CC1IE捕获中断
  TIM_ITConfig(TIM2,TIM_IT_Update|TIM_IT_CC2,ENABLE);
  TIM_ITConfig(TIM2,TIM_IT_Update|TIM_IT_CC3,ENABLE);
  TIM_ITConfig(TIM2,TIM_IT_Update|TIM_IT_CC4,ENABLE);

  TIM_Cmd(TIM2,ENABLE ); //使能定时器2
 
}


u8  TIM2CH1_CAPTURE_STA=0; //输入捕获状态    
u16 TIM2CH1_CAPTURE_VAL; //输入捕获值
u8  TIM2CH2_CAPTURE_STA=0; //输入捕获状态    
u16 TIM2CH2_CAPTURE_VAL; //输入捕获值
u8  TIM2CH3_CAPTURE_STA=0; //输入捕获状态    
u16 TIM2CH3_CAPTURE_VAL; //输入捕获值
u8  TIM2CH4_CAPTURE_STA=0; //输入捕获状态    
u16 TIM2CH4_CAPTURE_VAL; //输入捕获值
 
//定时器5中断服务程序  
void TIM2_IRQHandler(void)
{ 

  if((TIM2CH1_CAPTURE_STA&0X80)==0)//还未成功捕获
{  
if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
 
{    
if(TIM2CH1_CAPTURE_STA&0X40)//已经捕获到高电平了
{
if((TIM2CH1_CAPTURE_STA&0X3F)==0X3F)//高电平太长了
{
TIM2CH1_CAPTURE_STA|=0X80;//标记成功捕获了一次
TIM2CH1_CAPTURE_VAL=0XFFFF;
}else TIM2CH1_CAPTURE_STA++;
}  
}
if (TIM_GetITStatus(TIM2, TIM_IT_CC1) != RESET)//捕获1发生捕获事件
{
if(TIM2CH1_CAPTURE_STA&0X40) //捕获到一个下降沿
{  
TIM2CH1_CAPTURE_STA|=0X80; //标记成功捕获到一次上升沿
TIM2CH1_CAPTURE_VAL=TIM_GetCapture1(TIM2);
  TIM_OC1PolarityConfig(TIM2,TIM_ICPolarity_Rising); //CC1P=0 设置为上升沿捕获
}else   //还未开始,第一次捕获上升沿
{
TIM2CH1_CAPTURE_STA=0; //清空
TIM2CH1_CAPTURE_VAL=0;
TIM_SetCounter(TIM2,0);
TIM2CH1_CAPTURE_STA|=0X40; //标记捕获到了上升沿
  TIM_OC1PolarityConfig(TIM2,TIM_ICPolarity_Falling); //CC1P=1 设置为下降沿捕获
}    
}           
  }


if((TIM2CH2_CAPTURE_STA&0X80)==0)//还未成功捕获
{  
if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
 
{    
if(TIM2CH2_CAPTURE_STA&0X40)//已经捕获到高电平了
{
if((TIM2CH2_CAPTURE_STA&0X3F)==0X3F)//高电平太长了
{
TIM2CH2_CAPTURE_STA|=0X80;//标记成功捕获了一次
TIM2CH2_CAPTURE_VAL=0XFFFF;
}else TIM2CH2_CAPTURE_STA++;
}  
}
if (TIM_GetITStatus(TIM2, TIM_IT_CC2) != RESET)//捕获1发生捕获事件
{
if(TIM2CH2_CAPTURE_STA&0X40) //捕获到一个下降沿
{  
TIM2CH2_CAPTURE_STA|=0X80; //标记成功捕获到一次上升沿
TIM2CH2_CAPTURE_VAL=TIM_GetCapture2(TIM2);
  TIM_OC2PolarityConfig(TIM2,TIM_ICPolarity_Rising); //CC1P=0 设置为上升沿捕获
}else   //还未开始,第一次捕获上升沿
{
TIM2CH2_CAPTURE_STA=0; //清空
TIM2CH2_CAPTURE_VAL=0;
TIM_SetCounter(TIM2,0);
TIM2CH2_CAPTURE_STA|=0X40; //标记捕获到了上升沿
  TIM_OC2PolarityConfig(TIM2,TIM_ICPolarity_Falling); //CC1P=1 设置为下降沿捕获
}    
}           
  }

if((TIM2CH3_CAPTURE_STA&0X80)==0)//还未成功捕获
{  
if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
 
{    
if(TIM2CH3_CAPTURE_STA&0X40)//已经捕获到高电平了
{
if((TIM2CH3_CAPTURE_STA&0X3F)==0X3F)//高电平太长了
{
TIM2CH3_CAPTURE_STA|=0X80;//标记成功捕获了一次
TIM2CH3_CAPTURE_VAL=0XFFFF;
}else TIM2CH3_CAPTURE_STA++;
}  
}
if (TIM_GetITStatus(TIM2, TIM_IT_CC3) != RESET)//捕获1发生捕获事件
{
if(TIM2CH3_CAPTURE_STA&0X40) //捕获到一个下降沿
{  
TIM2CH3_CAPTURE_STA|=0X80; //标记成功捕获到一次上升沿
TIM2CH3_CAPTURE_VAL=TIM_GetCapture3(TIM2);
  TIM_OC3PolarityConfig(TIM2,TIM_ICPolarity_Rising); //CC1P=0 设置为上升沿捕获
}else   //还未开始,第一次捕获上升沿
{
TIM2CH3_CAPTURE_STA=0; //清空
TIM2CH3_CAPTURE_VAL=0;
TIM_SetCounter(TIM2,0);
TIM2CH3_CAPTURE_STA|=0X40; //标记捕获到了上升沿
  TIM_OC3PolarityConfig(TIM2,TIM_ICPolarity_Falling); //CC1P=1 设置为下降沿捕获
}    
}           
  }

if((TIM2CH4_CAPTURE_STA&0X80)==0)//还未成功捕获
{  
if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
 
{    
if(TIM2CH4_CAPTURE_STA&0X40)//已经捕获到高电平了
{
if((TIM2CH4_CAPTURE_STA&0X3F)==0X3F)//高电平太长了
{
TIM2CH4_CAPTURE_STA|=0X80;//标记成功捕获了一次
TIM2CH4_CAPTURE_VAL=0XFFFF;
}else TIM2CH4_CAPTURE_STA++;
}  
}
if (TIM_GetITStatus(TIM2, TIM_IT_CC4) != RESET)//捕获1发生捕获事件
{
if(TIM2CH4_CAPTURE_STA&0X40) //捕获到一个下降沿
{  
TIM2CH4_CAPTURE_STA|=0X80; //标记成功捕获到一次上升沿
TIM2CH4_CAPTURE_VAL=TIM_GetCapture4(TIM2);
  TIM_OC4PolarityConfig(TIM2,TIM_ICPolarity_Rising); //CC1P=0 设置为上升沿捕获
}else   //还未开始,第一次捕获上升沿
{
TIM2CH4_CAPTURE_STA=0; //清空
TIM2CH4_CAPTURE_VAL=0;
TIM_SetCounter(TIM2,0);
TIM2CH4_CAPTURE_STA|=0X40; //标记捕获到了上升沿
  TIM_OC4PolarityConfig(TIM2,TIM_ICPolarity_Falling); //CC1P=1 设置为下降沿捕获
}    
}           
  }


    TIM_ClearITPendingBit(TIM2, TIM_IT_CC1|TIM_IT_Update); //清除中断标志位
    TIM_ClearITPendingBit(TIM2, TIM_IT_CC2|TIM_IT_Update); //清除中断标志位
 TIM_ClearITPendingBit(TIM2, TIM_IT_CC3|TIM_IT_Update); //清除中断标志位
 TIM_ClearITPendingBit(TIM2, TIM_IT_CC4|TIM_IT_Update); //清除中断标志位
 
}
3通道接收时候4通道也会显示跟3通道相同的内容

正点原子

仿真找问题。