Homework2.cpp

00001 #include "mbed.h"
00002 
00003 DigitalIn button(p17); // Sets input to pin 17
00004 DigitalOut led1(LED1); // defines the first output to LED1
00005 DigitalOut led2(LED2); // defines the second output to LED2
00006 Serial pc(USBTX,USBRX);
00007 int counter; // defines an integer to counter
00008 int x; // defines an integer to x
00009 
00010 int main()
00011 {
00012     while(1) {
00013         x=button.read(); // "x" is equal to 1 or 0, depending on the state of the button
00014         if(counter>=10) { // when the integer "counter" is greater than or equal to 10, LED1 turns on
00015             led1=1;
00016         } else { // if the integer "x" is less than 10, LED1 is off
00017             led1=0;
00018         }
00019         if (x==1) { // if "x" equals one, LED2 turns on and off at one second frequency
00020             led2=1;
00021             wait(1);
00022             led2=0;
00023             wait(1);
00024         } else { // if "x" doesn't equal one (i.e. it equals zero), LED2 turns on and off at a 0.3 second frequency
00025             led2=1;
00026             wait(0.3);
00027             led2=0;
00028             wait(0.3);
00029         }
00030         if (button.read() != x) { // for every change in the button's state, 1 is added to the integer "counter"
00031             counter=counter+1;
00032             pc.printf("Instance: %i\r\n", counter);
00033 
00034         }
00035     }
00036 }