1单纯统计进出人数
#define pin_RED1 PA0
#define pin_RED2 PA1
int people_useNum=0;
int state_RED1=0;// 红外1
int state_RED2=0;// 红外2
int car_state[2]={0,0};
int car_oldstate[2]={0,0};
void setup(){
Serial.begin(9600);
pinMode(pin_RED1, INPUT);
pinMode(pin_RED2, INPUT);
}
void loop(){
String Lightmsg="People Num:"+String(people_useNum);
String Lightmsg1="IN_RED1:"+String(state_RED1);
String Lightmsg2="OUT_RED2:"+String(state_RED2);
state_RED1=!digitalRead(pin_RED1);
state_RED2=!digitalRead(pin_RED2);
car_state[0]=state_RED1;
car_state[1]=state_RED2;
if( car_state[0]==1){
if(car_oldstate[0]==0){
Serial.println("有人进入入口闸机");
car_oldstate[0]=1;
}
else{
Serial.println("人在入口闸机尚未离开");
}
}
else{
if(car_oldstate[0]==0){
Serial.println("入口等待有人进来");
}
else{
Serial.println("人已经离开入口闸机，人数+1");
people_useNum=people_useNum+1;
car_oldstate[0]=0;
}
}
if( car_state[1]==1){
if(car_oldstate[1]==0){
Serial.println("有人进入出口闸机");
car_oldstate[1]=1;
}
else{
Serial.println("人在出口闸机尚未离开");
}
}
else{
if(car_oldstate[1]==0){
//Serial.println("出口闸机等待有人进来");
}
else{
Serial.println("人已经离开出口闸机，人数-1");
people_useNum=people_useNum-1;
if(people_useNum<0){people_useNum=0;}
car_oldstate[1]=0;
}
}
Serial.print("当前人数：");Serial.println(people_useNum);
delay(1000);
}
标签：RED2,RED1,car,oldstate,stm32,state,例子,Serial,人数 From： https://www.cnblogs.com/gooutlook/p/18148165