![]() Thus the operation of an interrupt is as follows :ĭetection of an event → Interruption of the main program → Execution of the interrupt code → The processor picks up where it left off. Interrupts allow detecting an event in real-time while letting the microcontroller processor do other tasks. We can’t process real-time external events. So we can tell the microcontroller to do other tasks in the loop(), but in this case, the microcontroller will only look at the state of the button once at each iteration of the loop(). ![]() The problem is that this task keeps the microcontroller’s processor busy. Copy the code given below in that file and save it.Const int buttonPin = 33 const int ledPin = 2 // Push button status int buttonState = 0 void setup () Open your Arduino IDE and go to File > New. ![]() LOW: This is used to trigger the interrupt when the pin is in a low state.ĬHANGE: This is used to trigger the interrupt when the pin changes its state (HIGH-LOW or LOW-HIGH)Īrduino Sketch: Blinking LED using millis() The following four parameters are used to specify the mode: ![]()
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