一.对射式红外传感器计次

1.原理

 

2.硬件连接

3.程序

CountSensor.c:

#include "stm32f10x.h"                  // Device header
#include "Delay.h"

uint16_t CountSensor_Count;

void CountSensor_Init(void)
{
	//配置RCC时钟：
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
	//EXTI和NVIC时钟一直是打开的
	
	//配置GPIO,端口为输入模式：
	GPIO_InitTypeDef GPIO_InitStruture;
	GPIO_InitStruture.GPIO_Mode = GPIO_Mode_IPU;//上拉输入，可参考手册建议选择
	GPIO_InitStruture.GPIO_Pin = GPIO_Pin_14;
	GPIO_InitStruture.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOB,&GPIO_InitStruture);
	
	//配置AFIO，选择用上一步的GPIO，连接到后面的EXTI:
	GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource14);//配置AFIO的数据选择器
	//将PB14号引脚的电平信号通过AFIO进入到EXTI
	
	//配置EXTI（选择边沿触发方式，选择触发响应方式）:
	EXTI_InitTypeDef EXTI_InitStructure;
	EXTI_InitStructure.EXTI_Line = EXTI_Line14;
	EXTI_InitStructure.EXTI_LineCmd = ENABLE;
	EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;//中断模式
	EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;//下降沿触发
	EXTI_Init(&EXTI_InitStructure);
	
	//配置NVIC（选择优先级）:
	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
	//2 bits for pre-emption priority,2 bits for subpriority
	//pre-emption抢占优先级 subpriority响应优先级
	NVIC_InitTypeDef NVIC_InitStructure;
	NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
	NVIC_Init(&NVIC_InitStructure);
}

uint16_t CountSensor_Get(void)
{
	return CountSensor_Count;
}

void EXTI15_10_IRQHandler(void)//中断函数
{
	if(EXTI_GetITStatus(EXTI_Line14)==SET)//进行中断标志位的判断
	{
		Delay_ms(300);//消抖
		//开始中断函数：
		CountSensor_Count ++;
		EXTI_ClearITPendingBit(EXTI_Line14);//将中断标志位清除，以防无限中断
	}
}

CountSensor.h:

#ifndef __COUNT_SENSOR_H
#define __COUNT_SENSOR_H

void CountSensor_Init(void);
uint16_t CountSensor_Get(void);

#endif

main.c:

#include "stm32f10x.h"                  // Device header
#include "Delay.h"
#include "OLED.h"
#include "CountSensor.h"


int main(void)
{
	OLED_Init();
	CountSensor_Init();
	
	OLED_ShowString(1,1,"Count:");//显示字符串
	
	while(1)
	{
		OLED_ShowNum(1,7,CountSensor_Get(),5);
	}
}

二.旋转编码计次

1.硬件连接

2.程序

Encoder.c:

#include "stm32f10x.h"                  // Device header

int16_t Encoder_Count;

void Encoder_Init(void)
{
	//配置RCC时钟：
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
	//EXTI和NVIC时钟一直是打开的
	
	//配置GPIO,端口为输入模式：
	GPIO_InitTypeDef GPIO_InitStruture;
	GPIO_InitStruture.GPIO_Mode = GPIO_Mode_IPU;//上拉输入，可参考手册建议选择
	GPIO_InitStruture.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1;
	GPIO_InitStruture.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_Init(GPIOB,&GPIO_InitStruture);
	
	//配置AFIO，选择用上一步的GPIO，连接到后面的EXTI:
	GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource0);//配置AFIO的数据选择器
	//将PB0号引脚的电平信号通过AFIO进入到EXTI
	GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource1);//配置AFIO的数据选择器
	//将PB1号引脚的电平信号通过AFIO进入到EXTI
	
	//配置EXTI（选择边沿触发方式，选择触发响应方式）:
	EXTI_InitTypeDef EXTI_InitStructure;
	EXTI_InitStructure.EXTI_Line = EXTI_Line0 | EXTI_Line1;
	EXTI_InitStructure.EXTI_LineCmd = ENABLE;
	EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;//中断模式
	EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;//下降沿触发
	EXTI_Init(&EXTI_InitStructure);
	
	//配置NVIC（选择优先级）:
	NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
	//2 bits for pre-emption priority,2 bits for subpriority
	//pre-emption抢占优先级 subpriority响应优先级
	NVIC_InitTypeDef NVIC_InitStructure;
	NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
	NVIC_Init(&NVIC_InitStructure);
	
	NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
	NVIC_Init(&NVIC_InitStructure);

}

int16_t Encoder_Get(void)
{
	int16_t Temp;
	Temp = Encoder_Count;
	Encoder_Count = 0;
	return Temp;
}

void EXTI0_IRQHandler(void)
{
	if(EXTI_GetITStatus(EXTI_Line0) == SET)
	{
		//防止抖动
		if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_0) == 0)
		{
			if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_1) == 0)//是的话就是反转
			{
				Encoder_Count --;
			}
		}
		EXTI_ClearITPendingBit(EXTI_Line0);
	}
}

void EXTI1_IRQHandler(void)
{
	if(EXTI_GetITStatus(EXTI_Line1) == SET)
	{
		if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_1) == 0)
	    {
			if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_0) == 0)//是的话就是反转
			{
				Encoder_Count ++;
			}
	    }
		EXTI_ClearITPendingBit(EXTI_Line1);
	}
}

 Encoder.h:

#ifndef __ENCODER_H
#define __ENCODER_H
void Encoder_Init(void);
int16_t Encoder_Get(void);
#endif

main.c:

#include "stm32f10x.h"                  // Device header
#include "Delay.h"
#include "OLED.h"
#include "Encoder.h"

int16_t Num;

int main(void)
{
	OLED_Init();
	Encoder_Init();
	
	OLED_ShowString(1,1,"Num:");//显示字符串
	
	while(1)
	{
		Num += Encoder_Get();
		OLED_ShowSignedNum(1,5,Num,5);
	}
}

四.调试

出现了两个问题：

1.旋转无反应，调试发现因为有的面包板中间不相连，所以要用跳线相连。

2.旋转太慢时记不上数，最后在中断代码那里加了一个if语句防抖