SunFounder 3in1 Kit - Page 217

SunFounder 3in1 Kit
How it works?
1. Initialize the buttons and LEDs, 2 interrupt are used here to read the button status.
void setup()
{
...
attachInterrupt(digitalPinToInterrupt(buttonPin1), pressed1, FALLING);
attachInterrupt(digitalPinToInterrupt(buttonPin2), pressed2, FALLING);
...
}
2. If the rstBtn button is pressed, the game starts again. At a random time between 2 and 5ms, make one of the
LEDs light up.
void loop()
{
if (flag == -1 && digitalRead(rstBtn) == LOW) {
digitalWrite(ledPin1, LOW);
digitalWrite(ledPin2, LOW);
Serial.println("Waiting...");
int randomTime = random(2000, 5000);
delay(randomTime);
timer = millis();
flag = randomTime % 2;
Serial.println("Light!");
if (flag == 0) {
digitalWrite(ledPin1, HIGH);
} else if (flag == 1) {
digitalWrite(ledPin2, HIGH);
}
}
delay(200);
}
• When flag is -1 and rstBtn button is pressed, use random() function to generate a random time
of 2-5s.
• This time is then used to control the lighting of the LEDs.
• Also the lighting of 2 LEDs is randomly generated by randomTime % 2 with 0 and 1. If flag is
0, then LED1 is lit; if 1, then LED2 is lit.
3. About pressed1() function
void pressed1() {
if (flag == -1) {
return;
}
if (flag == 0) {
int currentTime = millis();
Serial.print("Correct! You reaction time is : ");
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4.6. 6. Funny Project 213