1.对射式红外传感器计次 

void EXTI_DeInit(void);        //把EXTI配置都清除，恢复到上电默认状态
void EXTI_Init(EXTI_InitTypeDef* EXTI_InitStruct//指向EXTI_InitTypeDef结构体的指针，其中包含了EXTI外设的基本信息);        //初始化
void EXTI_StructInit(EXTI_InitTypeDef* EXTI_InitStruct);        //
void EXTI_GenerateSWInterrupt(uint32_t EXTI_Line);        //软件触发外部中断
FlagStatus EXTI_GetFlagStatus(uint32_t EXTI_Line);
void EXTI_ClearFlag(uint32_t EXTI_Line);
ITStatus EXTI_GetITStatus(uint32_t EXTI_Line);        //获取中断标志位是否被置1
void EXTI_ClearITPendingBit(uint32_t EXTI_Line);        //清除中断标志位

void NVIC_PriorityGroupConfig(uint32_t NVIC_PriorityGroup);        //配置优先级分组：抢占优先级和响应优先级
void NVIC_Init(NVIC_InitTypeDef* NVIC_InitStruct//指向NVIC_InitTypeDef结构体的指针，该设备中含有NVIC外设的信息);        //根据NVIC_InitStruct中指定的参数初始化NVIC外设

（1）main.c

#include "Device/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:");while(1){OLED_ShowNum(1,7,countsensor_Get(),5);}
}

(2)countsensor.c

#include "Device/Include/stm32f10x.h"   // Device header
uint16_t countsensor_count;
void countsensor_Init()
{RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);GPIO_InitTypeDef GPIO_Initstructure;GPIO_Initstructure.GPIO_Mode=GPIO_Mode_IPU;GPIO_Initstructure.GPIO_Pin=GPIO_Pin_14;GPIO_Initstructure.GPIO_Speed=GPIO_Speed_50MHz;GPIO_Init(GPIOB,&GPIO_Initstructure);GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource14);//AFIO:选择要用做外部中断线源的GPIO端口：指定要配置的外部中断线EXTI_InitTypeDef EXTI_Initstructure;EXTI_Initstructure.EXTI_Line=EXTI_Line14;EXTI_Initstructure.EXTI_LineCmd=ENABLE;EXTI_Initstructure.EXTI_Mode=EXTI_Mode_Interrupt;EXTI_Initstructure.EXTI_Trigger=EXTI_Trigger_Falling;	//下降沿触发EXTI_Init(&EXTI_Initstructure);NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);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)
{if(EXTI_GetITStatus(EXTI_Line14)==SET)	//用于判断在该中断函数上的中断是否发生，若发生，标志位置1.{countsensor_count++;EXTI_ClearITPendingBit(EXTI_Line14);	//清除中断标志位，防止单片机检测到中断标志，重复进入中断}
}

 (3)countsensor.h

#ifndef __COUNT_SENSOR_H
#define __COUNT_SENSOR_Hvoid countsensor_Init(void);
uint16_t countsensor_Get(void);
//中断函数不需要调用，自动执行
#endif

 2.旋转编码器计数

(1)main.c

#include "Device/Include/stm32f10x.h"   // Device header
#include "Delay.h"
#include "OLED.h"
#include "encoder.h"
int16_t Num;
int main(void)
{OLED_Init();encode_Init();OLED_ShowString(1,1,"Num:");while(1){Num+=encoder_Get();OLED_ShowSignedNum(1,5,Num,5);}
}

（2）encoder.c

#include "Device/Include/stm32f10x.h"   // Device header
int16_t encodercount;
void encode_Init(void)
{RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);GPIO_InitTypeDef GPIO_Initstructure;GPIO_Initstructure.GPIO_Mode=GPIO_Mode_IPU;GPIO_Initstructure.GPIO_Pin=GPIO_Pin_0 | GPIO_Pin_1;GPIO_Initstructure.GPIO_Speed=GPIO_Speed_50MHz;GPIO_Init(GPIOB,&GPIO_Initstructure);GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource0);	//函数不能|，|后是两个数操作之后的值GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource1);//AFIO:选择要用做外部中断线源的GPIO端口：指定要配置的外部中断线EXTI_InitTypeDef EXTI_Initstructure;EXTI_Initstructure.EXTI_Line=EXTI_Line0|EXTI_Line1;EXTI_Initstructure.EXTI_LineCmd=ENABLE;EXTI_Initstructure.EXTI_Mode=EXTI_Mode_Interrupt;EXTI_Initstructure.EXTI_Trigger=EXTI_Trigger_Falling;	//下降沿触发EXTI_Init(&EXTI_Initstructure);//指向EXTI_InitTypeDef结构体的指针，其中包含了EXTI外设的基本信息   初始化NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);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);//指向NVIC_InitTypeDef结构体的指针，该设备中含有NVIC外设的信息//根据NVIC_InitStruct中指定的参数初始化NVIC外设NVIC_Initstructure.NVIC_IRQChannel=EXTI1_IRQn;NVIC_Initstructure.NVIC_IRQChannelCmd=ENABLE;NVIC_Initstructure.NVIC_IRQChannelPreemptionPriority=2;NVIC_Initstructure.NVIC_IRQChannelSubPriority=2;NVIC_Init(&NVIC_Initstructure);}
int16_t encoder_Get(void)
{int16_t temp;temp=encodercount;encodercount=0;return temp;
}
void EXTI0_IRQHandler(void)		//????????????
{if(EXTI_GetITStatus(EXTI_Line0)==SET)	//用于判断在该中断函数上的中断是否发生，若发生，标志位置1.{if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_1)==0){encodercount--;}EXTI_ClearITPendingBit(EXTI_Line0);	//清除中断标志位}
}
void EXTI1_IRQHandler(void)
{if(EXTI_GetITStatus(EXTI_Line1)==SET)	//中断标志位置1（SET），程序会跳到中断函数{if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_0)==0){encodercount++;}EXTI_ClearITPendingBit(EXTI_Line1);	//清除中断标志位}
}

（3）encoder.h

#ifndef __ENCODER_H
#define __ENCODER_Hvoid encode_Init(void);
int16_t encoder_Get(void);#endif