Revision 1:a6912eacfb20, committed 2015-08-10

Comitter:

ryuhs74

Date:

Mon Aug 10 01:02:07 2015 +0000

Parent:

0:86b2086be101

Commit message:

z

Changed in this revision

diff -r 86b2086be101 -r a6912eacfb20 hcsr04.cpp
--- a/hcsr04.cpp	Mon Apr 14 08:23:09 2014 +0000
+++ b/hcsr04.cpp	Mon Aug 10 01:02:07 2015 +0000
@@ -4,26 +4,26 @@
 *HCSR04.cpp
 */
 HCSR04::HCSR04(PinName t, PinName e) : trig(t), echo(e) {}
- long HCSR04::echo_duration() {
-        
+
+long HCSR04::echo_duration() {        
     timer.reset();  //reset timer
     trig=0;   // trigger low 
     wait_us(2); //  wait 
     trig=1;   //  trigger high
     wait_us(10);
     trig=0;  // trigger low
-         while(!echo); // start pulseIN
-      timer.start();
-     while(echo);
-      timer.stop();
-     return timer.read_us(); 
- 
+    
+    while(!echo); // start pulseIN
+        timer.start();
+    
+    while(echo);
+        timer.stop();
+    return timer.read_us(); 
 }
- 
+
 //return distance in cm 
 long HCSR04::distance(){
     duration = echo_duration();
-  distance_cm = (duration/2)/29.1  ;
-        return distance_cm;
-
+    distance_cm = (duration/2)/29.1  ;
+    return distance_cm;
 }
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