Arduino 向中断引脚发送错误信号

Question

我已将投币器和投币器连接到一个 arduino uno，投币器连接到引脚 2，投币器连接到引脚 3 - 传感器和引脚 7 - 继电器。投币器开关继电器时，正在执行投币中断

我的代码：

#define SENSOR  3
#define RELAY   7
#define ACCEPTOR 2

volatile boolean insert = false;

int pulse=0,count;               
char sen;
int temp=0;
unsigned long int timer;             

void setup()
{
  Serial.begin(9600);
  pinMode(SENSOR,INPUT_PULLUP);
  pinMode(RELAY,OUTPUT);
  sen=digitalRead(SENSOR);
  digitalWrite(RELAY, HIGH);
  attachInterrupt(digitalPinToInterrupt(ACCEPTOR), coinInterrupt, RISING);
}

void loop()
{
  if (insert) {
    insert = false;
    Serial.println("coin");
    delay(1000);
  }

  if(Serial.available())
  {
    timer=millis();
    // temp is amount to dispense send to arduino
    temp=Serial.parseInt();
    if(temp>0){
      digitalWrite(RELAY,LOW);}
  }

  sen=(sen<<1)|digitalRead(SENSOR);
  
  // if hopper sensor read drop coin
  if(sen==1)
  {
    timer=millis();
    pulse++;
    sen&=0x03;
    Serial.println("out 1");
    
    //if dispensed coins equal with coins to dispense stop engine
    if(pulse==temp)
    {
      digitalWrite(RELAY,HIGH);
      pulse=0;
      temp=0;
    }
  }

  // if amount dispensed is not equal with amount to dispense and engine running, stop
  if((digitalRead(RELAY)==LOW)&(millis()-timer>2000))
  {
    digitalWrite(RELAY,HIGH);
    pulse=0;
    temp=0;
  }
}

void coinInterrupt() {
  insert = true;
}

我试图更改引脚（arduino uno 仅支持引脚 2 和 3 上的中断）但问题仍然出现所以我猜代码中存在问题

Answer 1

您的草图不会在此状态下运行： 首先修复错误：

将 insert 声明为 volatile

删除 cpulse（未在任何地方使用）

将“if()”更改为（我想）“if（插入）....”

使用“sen”var 删除内容：只需使用 if(digitalRead(SENSOR)) 或 if(!digitalRead(SENSOR)) 除非你需要存储中继状态。

使用 || 等逻辑运算符或 && 除非你真的需要按位运算

结果草图示例：

#define SENSOR  3
#define RELAY   7

volatile boolean insert = false;
byte amountToDispense = 0;

int pulse = 0;
int temp = 0;
unsigned long int timer;

void setup()
{
  Serial.begin(9600);
  pinMode(SENSOR, INPUT_PULLUP);
  pinMode(RELAY, OUTPUT);
  digitalWrite(RELAY, HIGH);
  attachInterrupt(digitalPinToInterrupt(2), coinInterrupt, RISING);
}

void loop()
{
  if (insert ) {
    insert = false;
    Serial.println("coin");
    delay(1000);
  }

  if (Serial.available())
  {
    timer = millis();
    temp = Serial.parseInt();
    if (temp > 0) {
      //amountToDispense = Serial.read() - 48;
      digitalWrite(RELAY, LOW);
    }
  }

  if (digitalRead(SENSOR))
  {
    timer = millis();
    pulse++;
    Serial.println("out 1");
    if (pulse >= temp)
    {
      digitalWrite(RELAY, HIGH);
      pulse = 0;
      temp = 0;
    }
  }

  if (!digitalRead(RELAY) && (millis() - timer > 2000))
  {
    digitalWrite(RELAY, HIGH);
    pulse = 0;
    temp = 0;
  }
}

void coinInterrupt() {
  insert = true;
}