main.cpp

00001 #include "mbed.h"
00002 #include "ultrasonic.h"
00003 
00004  void dist(int distance)
00005 {
00006     //put code here to execute when the distance has changed
00007     if(distance*0.00328084 < 40) {
00008     printf("Distance %f ft\r\n", distance*0.00328084);
00009     }
00010 }
00011 
00012 ultrasonic mu(p6, p7, .1, 1, &dist);    //Set the trigger pin to D8 and the echo pin to D9
00013                                         //have updates every .1 seconds and a timeout after 1
00014                                         //second, and call dist when the distance changes
00015 
00016 int main()
00017 {
00018     mu.startUpdates();//start measuring the distance
00019     while(1)
00020     {
00021         //Do something else here
00022         mu.checkDistance();     //call checkDistance() as much as possible, as this is where
00023                                 //the class checks if dist needs to be called.
00024     }
00025 }