Diff: hcsr04.h

Revision:

10:338191178cbf

Parent:

8:c69fe28366d8

diff -r 16b63cd4aba8 -r 338191178cbf hcsr04.h
--- a/hcsr04.h	Thu May 07 04:14:57 2015 +0000
+++ b/hcsr04.h	Mon May 18 00:44:59 2015 +0000
@@ -35,6 +35,7 @@
 {
 public:
     static const double kMicrosecondsToCentimeters = 343.0 / 20000;
+    static const double kBogusPulse = 500 / kMicrosecondsToCentimeters;
     
     /** Create a HCSR04 object connected to the specified pin
     * @param pin i/o pin to connect to
@@ -46,10 +47,11 @@
     * @param distance in cms and returns -1, in case of failure
     */
     double get_dist_cm(void);
+    double get_max_dist_cm(void);
     /** Return the pulse duration equal to sonic waves travelling to obstacle and back to receiver.
     * @param pulse duration in microseconds.
     */
-    unsigned int get_pulse_us(void);
+    int get_pulse_us(void);
     /** Generates the trigger pulse of 10us on the trigger PIN.
     */
     void start(void );
@@ -65,7 +67,8 @@
     Timer pulsetime;
     DigitalOut  trigger;
     InterruptIn echo;
-    unsigned int pulsedur;
+    int pulsedur;
+    int maxpulse;
 };
 
 #endif
\ No newline at end of file