Diff: HCSR04.h

Revision:

2:3ebde19131af

Parent:

0:5461d44a187c

diff -r 68ad9acbec81 -r 3ebde19131af HCSR04.h
--- a/HCSR04.h	Mon Dec 02 23:14:26 2013 +0000
+++ b/HCSR04.h	Thu Dec 12 17:22:48 2013 +0000
@@ -43,19 +43,24 @@
 
 #include "mbed.h"
 
+#define MTRS_TO_INCH   (39.3701)
+
 typedef enum
 {
     RANGE_MEAS_INVALID,
     RANGE_MEAS_VALID
 } etHCSR04_RANGE_STATUS;
 
+
+
 class HCSR04
 {
 public:
     HCSR04( PinName pinTrigger, PinName pinEcho );
     void startMeas(void);
     etHCSR04_RANGE_STATUS getMeas(float &rRangeMeters);
-
+    
+    
 private:
     DigitalOut trigger;
     Ticker triggerTicker;
@@ -63,6 +68,8 @@
     Timer echoTimer;
     unsigned long measTimeStart_us;
     unsigned long measTimeStop_us;
+    unsigned long dTime_us;
+    etHCSR04_RANGE_STATUS status;
     
     void triggerTicker_cb(void);    // trigger ticker callback function
     void ISR_echoRising(void);      // ISR for rising edge