为什么我的代码不断循环电机 function 代码？

Question

Essentially as the title says the motor moving function keeps looping. And it stops printing the IR values to the serial, essentially it just keeps running the motor function.

I know this is probably stupid simple, and i should know it but the thing is that this is hacked together with code snippets online and i dont have any experience with c++ so.............. |{o_o}|

//why? i have no idea but platformio put it here so must be important
#include <arduino.h>
//include the ir remote stuff
#include <IRremote.h> 

//Controls speed of motors
int MAX_PWM_VOLTAGE = 150;

// the pin where you connect the output pin of IR sensor
int RECV_PIN = D5;
IRrecv irrecv(RECV_PIN);
decode_results results;
unsigned long key_value = 0; // variable to store the key value

void setup() 
{
    //Right Motor
    pinMode(D1, OUTPUT);
    pinMode(D2, OUTPUT);

    //Left Motor
    pinMode(D3, OUTPUT);
    pinMode(D4, OUTPUT);

    Serial.begin(9600);
    irrecv.enableIRIn();
}

void loop() 
{
    if (irrecv.decode(&results))
    {
        if (results.value == 0xFFFFFFFF) // if the value is equal to 0xFFFFFFFF
        {
            results.value = key_value; // set the value to the key value
        }

        Serial.println(" ");     
        Serial.print("Code: ");     
        Serial.println(results.value); //prints the value a a button press

    }

    key_value = results.value; // store the value as key_value
    irrecv.resume(); // reset the receiver for the next code
    
    //WHY DOES IT KEEP LOOPING & WHY ARE NO OTHER COMMANDS COMING IN??????
    if (results.value == 0xFF30CF)
    {
        Forward();
    }
    irrecv.resume();

}

void Reverse()
{
    digitalWrite(D2, LOW);
    digitalWrite(D3, LOW);
    analogWrite(D1, MAX_PWM_VOLTAGE);
    analogWrite(D4, MAX_PWM_VOLTAGE);
    delay(500);
    motorOff();
}

void Forward()
{
    digitalWrite(D1, LOW);
    digitalWrite(D4, LOW);
    analogWrite(D2, MAX_PWM_VOLTAGE);
    analogWrite(D3, MAX_PWM_VOLTAGE);
    delay(5000);
    motorOff();
}
    
void TurnLeft()
{
    digitalWrite(D1, LOW);
    digitalWrite(D3, LOW);
    
    analogWrite(D2, MAX_PWM_VOLTAGE);
    analogWrite(D4, MAX_PWM_VOLTAGE);
    motorOff();
}

void TurnRight()
{
    digitalWrite(D2, LOW);
    digitalWrite(D4, LOW);
    analogWrite(D1, MAX_PWM_VOLTAGE);
    analogWrite(D3, MAX_PWM_VOLTAGE);
    motorOff();
}

void motorOff()
{
    digitalWrite(D1, LOW);
    digitalWrite(D2, LOW);
    digitalWrite(D3,LOW);
    digitalWrite(D4,LOW);
}

Answer 1

Try to put a volatile qualifier in the declaration of the results:

volatile decode_results results;

Here is some info on why is it necessary to use volatile: https://www.arduino.cc/reference/en/language/variables/variable-scope-qualifiers/volatile/