counter.cpp

00001 #include "mbed.h"
00002 #include "dispBoB.h"
00003 
00004 dispBoB db(p28, p27, p26);          //instantiate a dispBoB object
00005 InterruptIn trigger(p12);           //set up the trigger as an external interrupt
00006 
00007 int counter = 0;                    //initialise counter object to zero
00008 
00009 void count(){                       //function to call upon interrupt
00010     counter++;                      //increment counter object
00011     db.locate(0);
00012     db.printf("%06d", counter);     //print counter info to dispBoB 
00013 }
00014 
00015 int main() {
00016     trigger.mode(PullUp);           //activate internal pull up (hardware specific)
00017     db.init();
00018     db.cls();                       //clear screen
00019     trigger.rise(&count);           //attach count() to interrupt on rising edge of trigger
00020     db.printf("%06d", counter);     //display an inital count "000000"
00021 }