Alexandre Kabla / HC_SR04_Ultrasonic_Library

Updated version of the library to deal with the constructor without onUpdate callback function.

Fork of HC_SR04_Ultrasonic_Library by EJ Teb

Files at this revision

API Documentation at this revision

Revision 5:abbb418bf10f, committed 2018-04-02

Comitter:
akabla
Date:
Mon Apr 02 15:16:16 2018 +0000
Parent:
4:e0f9c9fb4cf3
Commit message:
Changes to allow the library to run without the updateMethod callback function specified in the constructor.

Changed in this revision

ultrasonic.cpp Show annotated file Show diff for this revision Revisions of this file 
--- a/ultrasonic.cpp	Mon Nov 24 20:23:07 2014 +0000
+++ b/ultrasonic.cpp	Mon Apr 02 15:16:16 2018 +0000
@@ -2,8 +2,10 @@
     
     ultrasonic::ultrasonic(PinName trigPin, PinName echoPin, float updateSpeed, float timeout):_trig(trigPin), _echo(echoPin)
     {
+        _onUpdateMethod=NULL;
         _updateSpeed = updateSpeed;
         _timeout = timeout;
+        _t.start ();
     }
     
     ultrasonic::ultrasonic(PinName trigPin, PinName echoPin, float updateSpeed, float timeout, void onUpdate(int))
@@ -81,6 +83,6 @@
     {
         if(isUpdated())
         {
-            (*_onUpdateMethod)(_distance);
+            if (_onUpdateMethod) (*_onUpdateMethod)(_distance);
         }
     }