STM32学习--5-1 对射式红外传感器计次

接线图

原理图：

CountSensor.c

#include "stm32f10x.h"                  // Device headeruint16_t CountSensor_Count;void CountSensor_Init(void)
{RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE); // 开启APB2Periph外设GPIOB时钟RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);  // 开启APB2Periph外设AFIO时钟// 配置GPIOGPIO_InitTypeDef GPIO_InitStructure;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;  // 中断输入设置为上拉输入GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_Init(GPIOB,&GPIO_InitStructure);// 配置EXTIGPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource14); // 配置中断GPIOB、pin14EXTI_InitTypeDef EXTI_InitStructure;  // 配置EXTI_InitStructure参数EXTI_InitStructure.EXTI_Line = EXTI_Line14;  // 线14EXTI_InitStructure.EXTI_LineCmd = ENABLE;  // 开启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NVICNVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); // 设置2位响应优先级2位抢占NVIC_InitTypeDef NVIC_InitStruct;NVIC_InitStruct.NVIC_IRQChannel= EXTI15_10_IRQn; // 设置15-10NVIC_InitStruct.NVIC_IRQChannelCmd= ENABLE;NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority= 1; //设置抢占Preemption和响应优先级为1NVIC_InitStruct.NVIC_IRQChannelSubPriority= 1;NVIC_Init(&NVIC_InitStruct);
}uint16_t CountSensor_Get(void)
{return CountSensor_Count;
}void EXTI15_10_IRQHandler(void)
{if (EXTI_GetITStatus(EXTI_Line14) == SET)// 10-15都能进来，判断是否是14进入，取值SET、RESET{CountSensor_Count ++; // 每执行一次中断计数加一EXTI_ClearITPendingBit(EXTI_Line14); // 每次中断结束后，清除标志位，要不会卡死}
}

CountSensor.h

#ifndef __COUNTSENSOR_H
#define __COUNTSENSOR_Hvoid CountSensor_Init(void);
// 中断函数不需要导入，会自动执行
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:");  // 字符串用双引号括起来//OLED_ShowString(1,3,"    "); //清除某一部分while(1){OLED_ShowNum(1,7,CountSensor_Get(),3);}
}

效果图