main.cpp

#include <mbed.h>

// Variable to hold button State, this needs to be globally avaialable
int buttonState;

// Hander Function for our Buton Press
void handler(){
      printf("Update Button State\n");
      buttonState = !buttonState;
    } 

int main() {

  // put your setup code here, to run once:
  //Setup the LED1 pin to be a digital output called ledOne
  DigitalOut ledOne(LED1);
  
  //Setup the User Buton as an Input
  InterruptIn theButton(USER_BUTTON);

  //Bind the interupt to a function
  theButton.rise(&handler);

  while(1) {
    // put your main code here, to run repeatedly:

    //Print the State of our button
    printf("Button State is %d\n", buttonState);
    

    //Is the Button Pressed
    if (buttonState) { 
      ledOne = 1;
      thread_sleep_for(2000);
      ledOne = 0;
      thread_sleep_for(2000);
    }
    else{
      ledOne = 1;
      thread_sleep_for(500);
      ledOne = 0;
      thread_sleep_for(500);
    }
  }
}